CN115842520A - Oscillator system and processor - Google Patents
Oscillator system and processor Download PDFInfo
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- CN115842520A CN115842520A CN202310116547.7A CN202310116547A CN115842520A CN 115842520 A CN115842520 A CN 115842520A CN 202310116547 A CN202310116547 A CN 202310116547A CN 115842520 A CN115842520 A CN 115842520A
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Abstract
The present application relates to an oscillator system and a processor. The current reference generating circuit in the system is not started when the system is powered on, so that the local voltage regulator transmits a generated first signal to the starting circuit, and the starting circuit transmits a second signal to the current reference generating circuit according to the first signal; and the current reference generating circuit is started when receiving the second signal, so that the local voltage stabilizing source outputs a voltage stabilizing signal, the voltage stabilizing signal output by the local voltage stabilizing source is transmitted to the RC network circuit and the reverse gain circuit, and low-power-consumption oscillation output is realized through frequency selection of the RC network circuit and gain amplification of the reverse gain circuit. The band-gap reference and the operational amplifier in the traditional mode and the analog circuit of the divider resistor and the like are not needed, the required current branch can be reduced to the minimum degree, the band-gap reference and the operational amplifier are applicable to the application with extremely low standby power consumption, and meanwhile, the band-gap reference and the operational amplifier still have the application occasions with higher efficiency under low driving current, so that the power consumption of the circuit is reduced, and meanwhile, the bias current is low, the range of the driving current is wide, and the energy efficiency is high.
Description
Technical Field
The present application relates to the field of circuit processing technologies, and in particular, to an oscillator system and a processor.
Background
In the processing chip, a battery with a millimeter size is often required to supply power, so the total energy of the processing chip is limited. In order to reduce power and prolong service life, the internal systems of the processing chip are high-load cycles, are in a sleep mode most of the time, and wake up intermittently to measure environmental signals, process measurement data and transmit the data to the outside wirelessly. Therefore, the lower the power consumption of the oscillator used in the sleep mode, the better, and the power consumption of the system can be greatly reduced when the oscillator is applied to a battery-powered device.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the existing oscillator system contains more analog circuits, and the power consumption is still high.
Disclosure of Invention
In view of the above, it is desirable to provide an oscillator system and a processor that can reduce circuit power consumption, have a low bias current, a wide drive current range, and are energy efficient.
In a first aspect, the present application provides an oscillator system comprising:
the voltage stabilizing circuit comprises a starting circuit, a current reference generating circuit and a local voltage stabilizing source; the current reference generating circuit is connected between the starting circuit and a local voltage stabilizing source, and the output end of the local voltage stabilizing source is connected with the starting circuit; the current reference generating circuit is configured to be not started when the system is powered on, so that the local voltage stabilizing source transmits a generated first signal to the starting circuit, and the starting circuit transmits a second signal to the current reference generating circuit according to the first signal; the current reference generation circuit is also configured to be started when receiving the second signal so as to enable the local voltage regulator to output a voltage-stabilizing signal;
the oscillation circuit comprises an RC network circuit and a reverse gain circuit; the RC network circuit is connected with a reverse gain circuit, and the reverse gain circuit is connected with the output end of the local voltage stabilizing source.
Optionally, the starting circuit includes a first type switch tube, a second type switch tube, a third type switch tube, a fourth type switch tube, a first type switch tube and a second type switch tube;
the source electrode of the first one-way switching tube is connected with a power supply, the grid electrode of the first one-way switching tube is connected with the drain electrode of the first one-way switching tube, and the drain electrode of the first one-way switching tube is connected with the source electrode of the second one-way switching tube; the drain electrode of the second type switch tube is connected with the source electrode of the third type switch tube, the drain electrode of the third type switch tube is connected with the source electrode of the fourth type switch tube, the drain electrode of the fourth type switch tube is connected with the drain electrode of the first type switch tube, and the source electrode of the first type switch tube is connected with the ground wire; the grid electrode of the second type-I switch tube, the grid electrode of the third type-I switch tube, the grid electrode of the fourth type-I switch tube and the grid electrode of the first type-I switch tube are respectively connected with the output end of the local voltage stabilizing source;
the grid electrode of the second type switch tube is connected with the drain electrode of the fourth type switch tube, the drain electrode of the second type switch tube is connected with the current reference generating circuit, and the source electrode of the second type switch tube is connected with the ground wire.
Optionally, the current reference generating circuit includes a fifth type switching tube, a sixth type switching tube, a third type switching tube, a fourth type switching tube, a first triode, a second triode, and a first resistor;
the source electrode of the fifth type switch tube is connected with a power supply, the drain electrode of the fifth type switch tube is connected with the drain electrode of the third type switch tube, and the grid electrode of the fifth type switch tube is connected with the grid electrode of the sixth type switch tube;
the source electrode of the sixth type switch tube is connected with a power supply, and the drain electrode of the sixth type switch tube is respectively connected with the grid electrode of the sixth type switch tube, the drain electrode of the fourth type switch tube, the drain electrode of the second type switch tube and the local voltage-stabilizing source;
the drain electrode of the third type switch tube is connected with the grid electrode of the third type switch tube, the source electrode of the third type switch tube is connected with the collector electrode of the first triode, and the grid electrode of the third type switch tube is connected with the grid electrode of the third type switch tube; the source electrode of the fourth type switching tube is connected with the first end of the first resistor, and the second end of the first resistor is connected with the collector electrode of the second triode; the grid electrode of the second triode is respectively connected with the grid electrode of the first triode and the emitting electrode of the second triode; and the emitting electrode of the first triode and the emitting electrode of the second triode are respectively connected with the ground wire.
Optionally, the local voltage regulator includes a seventh type switch tube, an eighth type switch tube, a fifth type switch tube and a sixth type switch tube;
the grid electrode of the seventh type switch tube is connected with the drain electrode of the sixth type switch tube, the source electrode of the seventh type switch tube is connected with the power supply, and the drain electrode of the seventh type switch tube is respectively connected with the drain electrode of the fifth type switch tube and the grid electrode of the sixth type switch tube;
the source electrode of the fifth type switching tube is connected with the source electrode of the eighth type switching tube, the drain electrode of the eighth type switching tube is connected with the ground wire, and the grid electrode of the eighth type switching tube is connected with the drain electrode of the eighth type switching tube; the drain electrode of the sixth type switch tube is connected with a power supply, and the source electrode of the sixth type switch tube is respectively connected with the grid electrode, the oscillating circuit and the starting circuit of the fifth type switch tube.
Optionally, the local voltage regulator further includes a first capacitor;
the first end of the first capacitor is connected with the source electrode of the sixth type switch tube, and the second end of the first capacitor is connected with the ground wire.
Optionally, the inverse gain circuit includes a first inverse gain unit and a second inverse gain unit;
the first reverse gain unit and the second reverse gain unit are respectively connected with the output end of the local voltage stabilizing source; the RC network circuit is connected between the first reverse gain unit and the second reverse gain unit.
Optionally, the RC network circuit includes a second resistor and a second capacitor;
the first end of the second capacitor is connected with the first reverse gain unit, and the second end of the second capacitor is connected with the second reverse gain unit; the first end of the second resistor is connected with the first reverse gain unit, and the second end of the second resistor is connected with the second reverse gain unit.
Optionally, the first reverse gain unit includes a ninth type switching tube, an eleventh type switching tube, a tenth type switching tube, a seventh type switching tube, an eighth type switching tube, and a ninth type switching tube;
the source electrode of the ninth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the ninth type switch tube is connected with the drain electrode of the seventh type switch tube, and the source electrode of the seventh type switch tube is connected with the ground wire; the grid electrode of the ninth type switch tube is respectively connected with the grid electrode of the seventh type switch tube, the first end of the second resistor and the second reverse gain unit;
the source electrode of the eleventh type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the eleventh type switch tube is connected with the drain electrode of the eighth type switch tube, and the source electrode of the eighth type switch tube is connected with the ground wire; the grid electrode of the eleventh type switch tube is respectively connected with the grid electrode of the eighth type switch tube, the drain electrode of the ninth type switch tube and the drain electrode of the seventh type switch tube;
the source electrode of the eleventh type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the eleventh type switch tube is respectively connected with the drain electrode of the ninth type switch tube and the first end of the second capacitor, and the source electrode of the ninth type switch tube is connected with the ground wire; and the grid electrode of the eleventh type switch tube is respectively connected with the grid electrode of the ninth type switch tube, the drain electrode of the eleventh type switch tube and the drain electrode of the eighth type switch tube.
Optionally, the second reverse gain unit includes a twelfth type switch tube, a thirteenth type switch tube, a fourteenth type switch tube, a fifteenth type switch tube, a sixteenth type switch tube, a twelfth type switch tube, an eleventh type switch tube, a twelfth type switch tube, a thirteenth type switch tube and a fourteenth type switch tube;
the source electrode of the twelfth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the twelfth type switch tube is connected with the drain electrode of the twelfth type switch tube, and the source electrode of the twelfth type switch tube is connected with the ground wire; the grid electrode of the twelfth type switching tube is respectively connected with the grid electrode of the twelfth type switching tube, the second end of the second capacitor and the second end of the second resistor;
the source electrode of the thirteenth type switching tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the thirteenth type switching tube is connected with the drain electrode of the eleventh type switching tube, and the source electrode of the eleventh type switching tube is connected with the ground wire; the grid electrode of the thirteenth type switching tube is respectively connected with the grid electrode of the eleventh type switching tube, the drain electrode of the twelfth type switching tube and the drain electrode of the twelfth type switching tube;
the source electrode of the fourteenth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the fourteenth type switch tube is connected with the drain electrode of the twelfth type switch tube, and the source electrode of the twelfth type switch tube is connected with the ground wire; the grid electrode of the fourteenth type switch tube is respectively connected with the grid electrode of the twelfth type switch tube, the drain electrode of the thirteenth type switch tube and the drain electrode of the eleventh type switch tube;
the source electrode of the fifteenth type switching tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the fifteenth type switching tube is connected with the drain electrode of the thirteenth type switching tube, and the source electrode of the thirteenth type switching tube is connected with the ground wire; the grid electrode of the fifteenth type switch tube is respectively connected with the grid electrode of the thirteenth type switch tube, the drain electrode of the fourteenth type switch tube and the drain electrode of the twelfth type switch tube;
the source electrode of the sixteenth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the sixteenth type switch tube is respectively connected with the drain electrode of the fourteenth type switch tube, the grid electrode of the ninth type switch tube, the grid electrode of the seventh type switch tube and the first end of the second resistor, and the source electrode of the fourteenth type switch tube is connected with the ground wire; the grid electrode of the sixteenth type switch tube is respectively connected with the grid electrode of the fourteenth type switch tube, the drain electrode of the fifteenth type switch tube and the drain electrode of the thirteenth type switch tube.
In a second aspect, the present application provides a processor comprising the oscillator system of any one of the above.
One of the above technical solutions has the following advantages and beneficial effects:
the oscillator system comprises a voltage stabilizing circuit and an oscillating circuit, wherein the voltage stabilizing circuit comprises a starting circuit, a current reference generating circuit and a local voltage stabilizing source; the current reference generating circuit is connected between the starting circuit and a local voltage stabilizing source, and the output end of the local voltage stabilizing source is connected with the starting circuit; the oscillation circuit comprises an RC network circuit and a reverse gain circuit; the RC network circuit is connected with the reverse gain circuit, and the reverse gain circuit is connected with the output end of the local voltage stabilizing source; the current reference generating circuit is configured to be not started when the system is powered on, so that the local voltage stabilizing source transmits a generated first signal to the starting circuit, and the starting circuit transmits a second signal to the current reference generating circuit according to the first signal; the current reference generating circuit is also configured to be started when receiving the second signal, so that the local voltage regulator outputs a voltage-stabilizing signal, the voltage-stabilizing signal output by the local voltage regulator is transmitted to the RC network circuit and the reverse gain circuit, and low-power-consumption oscillation output is realized through frequency selection of the RC network circuit and gain amplification of the reverse gain circuit. The band-gap reference and the operational amplifier in the traditional mode and more analog circuits such as the divider resistor are not needed, the required current branch can be reduced to the lowest degree, the low-standby power consumption is suitable for the application occasions with extremely low standby power consumption, high efficiency is still achieved under low driving current, the power consumption of the circuit is reduced, meanwhile, the bias current is low, the range of the driving current is wide, and the energy efficiency is high.
Drawings
Fig. 1 is a schematic circuit diagram of a conventional oscillator system;
FIG. 2 is a schematic circuit diagram of a conventional oscillator;
FIG. 3 is a schematic diagram of a first circuit configuration of an oscillator system in one embodiment;
FIG. 4 is a schematic diagram of a circuit configuration of a voltage regulator circuit according to an embodiment;
FIG. 5 is a schematic diagram of a second circuit configuration of an oscillator system in accordance with one embodiment;
fig. 6 is a schematic circuit diagram of an oscillation circuit according to an embodiment.
Reference numerals:
100. a voltage stabilizing circuit; 110. a start-up circuit; 120. a current reference generating circuit; 130. a local voltage regulator; 200. an oscillation circuit; 210. an RC network circuit; 220. an inverting gain circuit; 230. a first inverse gain unit; 240. a second inverse gain unit; p1, a first one-type switch tube; p2, a second first-type switch tube; p3, a third first-type switch tube; p4, a fourth first-type switch tube; p5, a fifth type switch tube; p6, a sixth first-type switch tube; p7, a seventh first type switch tube; p8, an eighth first-type switch tube; p9, a ninth first-type switch tube; p10, an eleventh switch tube; p11, an eleventh type switch tube; p12, a twelfth type switch tube; p13, a thirteenth type switch tube; p14, a fourteenth type switch tube; p15, fifteenth switching tube; p16, sixteenth type switching tube; n1, a first type switch tube; n2, a second type switch tube; n3, a third type switch tube; n4, a fourth type switch tube; n5, a fifth type switch tube; n6, a sixth type switch tube; n7, a seventh type switch tube; n8, eighth type switch tube; n9, a ninth type switch tube; n10, a twelfth type switch tube; n11, eleventh type switch tube; n12, a twelfth type switch tube; n13, type thirteen switch tube; n14, a fourteenth type switch tube; q1, a first triode; q2 and a second triode; r1 and a first resistor; r2 and a second resistor; c1, a first capacitor; c2 and a second capacitor.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The conventional oscillator system includes a linear regulator, a bandgap reference circuit and an oscillator circuit, as shown in fig. 1: the traditional linear voltage stabilizer needs a band gap reference circuit to provide stable reference voltage which does not change along with temperature and voltage, and then a closed loop driving circuit formed by an operational amplifier and negative feedback generates stable output voltage. The linear voltage stabilizer is composed of an OTA (operational transconductance amplifier), divider resistors R10 and R20 and a driving tube MP1, wherein the error amplifier adjusts the grid voltage of the power tube MP1 by amplifying the difference value of the feedback voltage and the reference voltage, so that the current provided by the power tube MP1 is increased or reduced, and the output voltage is stabilized.
A schematic diagram of a conventional oscillator is shown in fig. 2, and the conventional oscillator is composed of a switching tube MN1, a switching tube MN2, a switching tube MP3, a capacitor C10, a capacitor C20, a comparator CMP1, a comparator CMP2, an RS flip-flop, and a current source reference IREF. The current reference IREF charges the capacitor C10 and the capacitor C20 through the switch tube MP2 and the switch tube MP3 respectively, the switch tube MN1 and the switch tube MN2 discharge the capacitor C10 and the capacitor C20, the charging voltage is controlled by two comparators (CMP 1 and CMP 2), and the output of the comparators is fed back to the switch tube MN1 and the switch tube MN2 after passing through the RS trigger to form a positive feedback loop. The output of the RS flip-flop is taken as the constant output. From the power consumption point of view, the conventional vibrator system includes many analog circuits, and the power consumption is still high.
In order to solve the above-mentioned problems in the conventional oscillator system, in one embodiment, as shown in fig. 3, an oscillator system is provided, which includes a voltage stabilizing circuit 100 and an oscillating circuit 200.
The voltage stabilizing circuit 100 comprises a starting circuit 110, a current reference generating circuit 120 and a local voltage stabilizing source 130; the current reference generating circuit 120 is connected between the starting circuit 110 and the local voltage regulator 130, and the output end of the local voltage regulator 130 is connected with the starting circuit 110; the current reference generating circuit 120 is configured to be not turned on when the system is powered on, so that the local voltage regulator 130 transmits the generated first signal to the starting circuit 110, and the starting circuit 110 transmits a second signal to the current reference generating circuit 120 according to the first signal; the current reference generating circuit 120 is further configured to turn on when receiving the second signal, so that the local regulator 130 outputs the regulated signal; the oscillating circuit 200 includes an RC network circuit 210 and an inverse gain circuit 220; the RC network circuit 210 is coupled to a reverse gain circuit 220, and the reverse gain circuit 220 is coupled to the output of the local regulator 130.
The voltage regulator circuit 100 may be used in a power circuit that maintains a substantially constant output voltage even when the input grid voltage fluctuates or the load changes. The voltage stabilizing circuit 100 includes a start-up circuit 110, a current reference generating circuit 120 and a local regulator 130, wherein the start-up circuit 110 is used for driving the current reference generating circuit 120 to be turned on. The current reference generating circuit 120 may generate a current reference according to the driving of the starting circuit 110, so that the local regulator 130 outputs a regulated signal.
The current reference generation circuit 120 is connected between the starting circuit 110 and the local voltage stabilizing source 130, the output end of the local voltage stabilizing source 130 is connected with the starting circuit 110, when the system is powered on and started, the starting circuit 110 is not started, the current reference generation circuit 120 is not started, the local voltage stabilizing source 130 generates a first signal, and the first signal is transmitted to the starting circuit 110. The start-up circuit 110 is activated according to the first signal, and the start-up circuit 110 generates a second signal and transmits the second signal to the current reference generating circuit 120. The current reference generating circuit 120 is turned on according to the received second signal, and further provides a current reference to the local regulator 130, so that the local regulator 130 outputs a regulated signal. Illustratively, the first signal may be a low level signal and the second signal may be a low level signal.
The oscillating circuit 200 refers to a circuit that generates an oscillating current, which is a current that periodically changes in magnitude and direction. The oscillating circuit 200 includes an RC network circuit 210 and an inverse gain circuit 220, wherein the RC network circuit 210 is a frequency-selecting network circuit composed of a resistor R and a capacitor C, and the inverse gain circuit 220 plays a role of gain amplification.
The RC network based circuit 210 is connected to a reverse gain circuit 220, and the reverse gain circuit 220 is connected to an output terminal of the local regulator 130. And the regulated voltage signal output by the local regulator 130 is transmitted to the RC network circuit 210 and the reverse gain circuit 220, amplified by the frequency selection of the RC network circuit 210 and the gain of the reverse gain circuit 220, and then output an oscillation signal.
In the above embodiment, the current reference based generating circuit 120 is connected between the starting circuit 110 and the local regulator 130, and the output terminal of the local regulator 130 is connected to the starting circuit 110; the RC network circuit 210 is connected with a reverse gain circuit 220, and the reverse gain circuit 220 is connected with the output end of the local voltage stabilizing source 130; the current reference generating circuit 120 is configured not to be turned on when the system is powered on, so that the local regulator 130 transmits the generated first signal to the starting circuit 110, and the starting circuit 110 transmits a second signal to the current reference generating circuit 120 according to the first signal; the current reference generating circuit 120 is further configured to be turned on when receiving the second signal, so that the local regulator 130 outputs a regulated voltage signal, and then the regulated voltage signal output by the local regulator 130 is transmitted to the RC network circuit 210 and the reverse gain circuit 220, and low power consumption oscillation output is realized through frequency selection of the RC network circuit 210 and gain amplification of the reverse gain circuit 220. The band-gap reference and the operational amplifier in the traditional mode and more analog circuits such as the divider resistor are not needed, the required current branch can be reduced to the lowest degree, the low-standby power consumption is suitable for the application occasions with extremely low standby power consumption, high efficiency is still achieved under low driving current, the power consumption of the circuit is reduced, meanwhile, the bias current is low, the range of the driving current is wide, and the energy efficiency is high.
In one example, as shown in fig. 4, the starting circuit 110 includes a first type switch P1, a second type switch P2, a third type switch P3, a fourth type switch P4, a first type switch N1, and a second type switch N2. The source electrode of the first one-way switch tube P1 is connected with a power supply, the grid electrode of the first one-way switch tube P1 is connected with the drain electrode of the first one-way switch tube P1, and the drain electrode of the first one-way switch tube P1 is connected with the source electrode of the second one-way switch tube P2; the drain electrode of the second type switch tube P2 is connected with the source electrode of the third type switch tube P3, the drain electrode of the third type switch tube P3 is connected with the source electrode of the fourth type switch tube P4, the drain electrode of the fourth type switch tube P4 is connected with the drain electrode of the first type switch tube N1, and the source electrode of the first type switch tube N1 is connected with the ground wire; the grid electrode of the second type-I switch tube P2, the grid electrode of the third type-I switch tube P3, the grid electrode of the fourth type-I switch tube P4 and the grid electrode of the first type-II switch tube N1 are respectively connected with the output end of the local voltage-stabilizing source 130; the gate of the second type switch N2 is connected to the drain of the fourth type switch P4, the drain of the second type switch N2 is connected to the current reference generating circuit 120, and the source of the second type switch N2 is connected to the ground.
The first-type switching tube P1, the second first-type switching tube P2, the third first-type switching tube P3 and the fourth first-type switching tube P4 can all adopt P-type MOS tubes. The first-type switch tube N1 and the second-type switch tube N2 can adopt N-type MOS tubes. The power supply may be, but is not limited to, a battery powered power supply.
In an initial stage of power-on start of the system, since the current reference generating circuit 120 is not turned on, the local regulator 130 outputs a first signal (low level signal), and the gate of the first type switch tube P1, the gate of the second type switch tube P2, the gate of the third type switch tube P3, and the gate of the fourth type switch tube P4 are respectively based on the first signal, so that the first type switch tube P1, the second type switch tube P2, the third type switch tube P3, and the fourth type switch tube P4 are respectively turned on, and the first type switch tube N1 is turned off, and further the gate of the second type switch tube N2 is high level, and the second type switch tube N2 is turned on, thereby providing a second signal (low level signal) to the current reference generating circuit 120, so that the current reference generating circuit 120 is turned on to operate, and accordingly the local regulator 130 outputs a voltage stabilizing signal based on the circuit reference provided by the current reference generating circuit 120.
In a system working stage, the local regulator 130 outputs a voltage stabilization signal (high level signal), and the gate of the first type switch tube P1, the gate of the second type switch tube P2, the gate of the third type switch tube P3, and the gate of the fourth type switch tube P4 are based on the voltage stabilization signal, so that the first type switch tube P1, the second type switch tube P2, the third type switch tube P3, and the fourth type switch tube P4 are respectively turned off, and the first type switch tube N1 is turned on, so that the gate of the second type switch tube N2 is at a low level, the second type switch tube N2 is turned off, so that the current reference generating circuit 120 is kept on to work, and the local regulator 130 outputs the voltage stabilization signal based on the circuit reference provided by the current reference generating circuit 120.
In one example, as shown in fig. 4, the current reference generating circuit 120 includes a fifth type switch P5, a sixth type switch P6, a third type switch N3, a fourth type switch N4, a first transistor Q1, a second transistor Q2, and a first resistor R1. The source electrode of the fifth type switch tube P5 is connected with a power supply, the drain electrode of the fifth type switch tube P5 is connected with the drain electrode of the third type switch tube N3, and the grid electrode of the fifth type switch tube P5 is connected with the grid electrode of the sixth type switch tube P6; the source electrode of the sixth first-type switch tube P6 is connected with a power supply, and the drain electrode of the sixth first-type switch tube P6 is respectively connected with the grid electrode of the sixth first-type switch tube P6, the drain electrode of the fourth second-type switch tube N4, the drain electrode of the second-type switch tube N2 and the local voltage-stabilizing source 130; the drain electrode of the third type switch tube N3 is connected with the grid electrode of the third type switch tube N3, the source electrode of the third type switch tube N3 is connected with the collector electrode of the first triode Q1, and the grid electrode of the third type switch tube N3 is connected with the grid electrode of the third type switch tube N3; a source electrode of the second type switching tube N4 is connected with a first end of a first resistor R1, and a second end of the first resistor R1 is connected with a collector electrode of a second triode Q2; the grid electrode of the second triode Q2 is respectively connected with the grid electrode of the first triode Q1 and the emitting electrode of the second triode Q2; and the emitting electrode of the first triode Q1 and the emitting electrode of the second triode Q2 are respectively connected with the ground wire.
The fifth first-type switching tube P5 and the sixth first-type switching tube P6 may be P-type MOS tubes. The third-type and fourth-type transistors N3 and N4 may be N-type MOS transistors. The first transistor Q1 and the second transistor Q2 may be NPN transistors.
At the initial stage of power-on start of the system, since the current reference generating circuit 120 is not turned on, the local regulator 130 outputs a first signal (low level signal), the gate of the first type switch tube P1, the gate of the second type switch tube P2, the gate of the third type switch tube P3, and the gate of the fourth type switch tube P4 are respectively based on the first signal, so that the first type switch tube P1, the second type switch tube P2, the third type switch tube P3, and the fourth type switch tube P4 are respectively turned on, and the first type switch tube N1 is turned off, so that the gate of the second type switch tube N2 is high level, the second type switch tube N2 is turned on, so that the gate of the fifth type switch tube P5 and the gate of the sixth type switch tube P6 are low level, so that the fifth type switch tube P5 and the sixth type switch tube P6 are turned on, so that the third type switch tube N3, the fourth type switch tube N4, the gate of the first type switch tube P1, and the second type switch tube P6 are turned on, and the reference voltage reference generating circuit 120, thereby eliminating the power supply generated current output when the local regulator is turned on, and the reference voltage output circuit is based on.
In one example, as shown in fig. 4, the local regulator 130 includes a seventh type P7, an eighth type P8, a fifth type N5, and a sixth type N6. The grid electrode of the seventh type switch tube P7 is connected with the drain electrode of the sixth type switch tube P6, the source electrode of the seventh type switch tube P7 is connected with a power supply, and the drain electrode of the seventh type switch tube P7 is respectively connected with the drain electrode of the fifth type switch tube N5 and the grid electrode of the sixth type switch tube N6; a source electrode of the second type switch tube N5 is connected with a source electrode of the eighth type switch tube P8, a drain electrode of the eighth type switch tube P8 is connected with a ground wire, and a grid electrode of the eighth type switch tube P8 is connected with a drain electrode of the eighth type switch tube P8; the drain of the second type switching tube N6 is connected to the power supply, and the source of the second type switching tube N6 is connected to the gate of the fifth type switching tube N5, the oscillation circuit 200, and the start circuit 110, respectively.
The seventh first-type switching tube P7 and the eighth first-type switching tube P8 may be P-type MOS tubes, respectively. The fifth-type switch N5 and the sixth-type switch N6 may be N-type MOS transistors, respectively.
In an initial stage of power-on start of the system, since the current reference generating circuit 120 is not turned on, the local regulator 130 outputs a first signal (low level signal), the gate of the first type switch tube P1, the gate of the second type switch tube P2, the gate of the third type switch tube P3, and the gate of the fourth type switch tube P4 are respectively turned on based on the first signal, and the first type switch tube P1, the second type switch tube P2, the third type switch tube P3, and the fourth type switch tube P4 are respectively turned on, and the first type switch tube N1 is turned off, so that the gate of the second type switch tube N2 is high level, the second type switch tube N2 is turned on, so that the gate of the fifth type switch tube P5 and the gate of the sixth type switch tube P6 are low level, so that the fifth type switch tube P5 and the sixth type switch tube P6 are turned on, so that the third type switch tube N3, the fourth type switch tube N4, the gate of the first type switch tube P1, and the gate of the second type switch tube P6 are low level, so that the fifth type switch tube P7 and the eighth type switch tube P8 are turned on, and the eighth type switch tube P7, so that the local regulator circuit generates a low level signal, and the eighth switch transistor operates.
In one example, as shown in fig. 4, the local regulator 130 further includes a first capacitor C1; the first end of the first capacitor C1 is connected with the source electrode of the sixth type switch tube N6, and the second end of the first capacitor C1 is connected with the ground wire. Wherein the capacitance value of the first capacitor C1 can be determined according to the actual circuit design.
Illustratively, the fifth-type switch tube N5 and the eighth-type switch tube P8 provide a bias voltage for the sixth-type switch tube N6, and the local regulator 130 outputs a regulated signal voltage approximately equal to the sum of the gate-source voltages of the fifth-type switch tube N5 and the eighth-type switch tube P8. By adjusting the size of the switch tube, the voltage of the voltage-stabilizing signal output by the local voltage-stabilizing source 130 is greater than the sum of the threshold voltages of the P-type MOS tube and the N-type MOS tube, so as to ensure the working requirements of the subsequent oscillation circuit 200.
In the above embodiment, a band gap reference, an operational amplifier, a divider resistor and other analog circuits in a conventional manner are not required, a required current branch can be reduced to the lowest extent, and the method is suitable for an application scenario with extremely low standby power consumption and high efficiency under low driving current, so that the power consumption of the circuit is reduced, and meanwhile, the bias current is low, the driving current range is wide, and the energy efficiency is high.
In one example, as shown in fig. 5, the inverse gain circuit 220 includes a first inverse gain unit 230 and a second inverse gain unit 240. The first reverse gain unit 230 and the second reverse gain unit 240 are respectively connected to the output end of the local regulator 130; the RC network circuit 210 is connected between the first inverse gain unit 230 and the second inverse gain unit 240.
Wherein the first and second inverse gain units 230 and 240 constitute 2-stage inverse gain. For example, the first inverse gain unit 230 may include 3 inverters, and the second inverse gain unit 240 may include 5 inverters. The phase inverter can be composed of an N-type MOS tube and a P-type MOS tube.
Illustratively, as shown in fig. 6, the RC network circuit 210 includes a second resistor R2 and a second capacitor C2. A first end of the second capacitor C2 is connected to the first inverse gain unit 230, and a second end of the second capacitor C2 is connected to the second inverse gain unit 240; a first terminal of the second resistor R2 is connected to the first inverse gain unit 230, and a second terminal of the second resistor R2 is connected to the second inverse gain unit 240.
The resistance value of the second resistor R2 and the capacitance value of the second capacitor C2 may be determined according to actual circuit applications. The second resistor R2 and the second capacitor C2 form a frequency-selecting network circuit. By setting the second resistor R2 and the second capacitor C2, the oscillation frequency of the oscillation circuit 200 is further determined.
As shown in fig. 6, the first inverting gain unit 230 includes a ninth type P9, an eleventh type P10, a tenth type P11, a seventh type N7, an eighth type N8 and a ninth type N9. The source electrode of the ninth type switch tube P9 is connected with the output end of the local voltage stabilizing source 130, the drain electrode of the ninth type switch tube P9 is connected with the drain electrode of the seventh type switch tube N7, and the source electrode of the seventh type switch tube N7 is connected with the ground wire; the gate of the ninth first-type switch P9 is connected to the gate of the seventh second-type switch N7, the first end of the second resistor R2, and the second inverse gain unit 240, respectively; the source electrode of the eleventh type switch tube P10 is connected with the output end of the local voltage-stabilizing source 130, the drain electrode of the eleventh type switch tube P10 is connected with the drain electrode of the eighth type switch tube N8, and the source electrode of the eighth type switch tube N8 is connected with the ground wire; the grid electrode of the eleventh type switch tube P10 is respectively connected with the grid electrode of the eighth type switch tube N8, the drain electrode of the ninth type switch tube P9 and the drain electrode of the seventh type switch tube N7; the source electrode of the eleventh type switch tube P11 is connected with the output end of the local voltage-stabilizing source 130, the drain electrode of the eleventh type switch tube P11 is respectively connected with the drain electrode of the ninth type switch tube N9 and the first end of the second capacitor C2, and the source electrode of the ninth type switch tube N9 is connected with the ground wire; the grid electrode of the eleventh type switch tube P11 is respectively connected with the grid electrode of the ninth type switch tube N9, the drain electrode of the eleventh type switch tube P10 and the drain electrode of the eighth type switch tube N8.
The ninth first-type switching tube P9, the eleventh switching tube P10 and the tenth first-type switching tube P11 may be P-type MOS tubes, respectively. The seventh type switch N7, the eighth type switch N8 and the ninth type switch N9 may be N-type MOS transistors, respectively. The phase inverter is composed of a ninth type switch tube P9 and a seventh type switch tube N7, a phase inverter is composed of an eleventh type switch tube P10 and an eighth type switch tube N8, and a phase inverter is composed of a tenth type switch tube P11 and a ninth type switch tube N9. I.e., the first inverse gain unit 230 is composed of 3 inverters.
As shown in fig. 6, the second reverse gain unit 240 includes a twelfth type switch P12, a thirteenth type switch P13, a fourteenth type switch P14, a fifteenth type switch P15, a sixteenth type switch P16, a twelfth type switch N10, an eleventh type switch N11, a twelfth type switch N12, a thirteenth type switch N13, and a fourteenth type switch N14.
The source electrode of the twelfth type switch tube P12 is connected with the output end of the local voltage stabilizing source 130, the drain electrode of the twelfth type switch tube P12 is connected with the drain electrode of the twelfth type switch tube N10, and the source electrode of the twelfth type switch tube N10 is connected with the ground wire; the gate of the twelfth type switch tube P12 is connected to the gate of the twelfth type switch tube N10, the second end of the second capacitor C2, and the second end of the second resistor R2, respectively. The source electrode of the thirteenth type switch tube P13 is connected with the output end of the local voltage-stabilizing source 130, the drain electrode of the thirteenth type switch tube P13 is connected with the drain electrode of the eleventh type switch tube N11, and the source electrode of the eleventh type switch tube N11 is connected with the ground wire; the grid electrode of the thirteenth type switch tube P13 is respectively connected with the grid electrode of the eleventh type switch tube N11, the drain electrode of the twelfth type switch tube P12 and the drain electrode of the twelfth type switch tube N10. The source electrode of the fourteenth type switch tube P14 is connected with the output end of the local voltage-stabilizing source 130, the drain electrode of the fourteenth type switch tube P14 is connected with the drain electrode of the twelfth type switch tube N12, and the source electrode of the twelfth type switch tube N12 is connected with the ground wire; the grid electrode of the fourteenth type switch tube P14 is respectively connected with the grid electrode of the twelfth type switch tube N12, the drain electrode of the thirteenth type switch tube P13 and the drain electrode of the eleventh type switch tube N11.
The source electrode of the fifteenth type switch tube P15 is connected with the output end of the local voltage-stabilizing source 130, the drain electrode of the fifteenth type switch tube P15 is connected with the drain electrode of the thirteenth type switch tube N13, and the source electrode of the thirteenth type switch tube N13 is connected with the ground wire; the grid electrode of the fifteenth type switch tube P15 is respectively connected with the grid electrode of the thirteenth type switch tube N13, the drain electrode of the fourteenth type switch tube P14 and the drain electrode of the twelfth type switch tube N12. The source electrode of a sixteenth type switch tube P16 is connected with the output end of the local voltage-stabilizing source 130, the drain electrode of the sixteenth type switch tube P16 is respectively connected with the drain electrode of a fourteenth type switch tube N14, the grid electrode of a ninth type switch tube P9, the grid electrode of a seventh type switch tube N7 and the first end of a second resistor R2, and the source electrode of the fourteenth type switch tube N14 is connected with the ground wire; a gate of the sixteenth type switch P16 is connected to a gate of the fourteenth type switch N14, a drain of the fifteenth type switch P15, and a drain of the thirteenth type switch N13, respectively.
The twelfth type switching tube P12, the thirteenth type switching tube P13, the fourteenth type switching tube P14, the fifteenth type switching tube P15 and the sixteenth type switching tube P16 may be P-type MOS tubes, respectively. The twelfth type switch tube N10, the eleventh type switch tube N11, the twelfth type switch tube N12, the thirteenth type switch tube N13 and the fourteenth type switch tube N14 may be N-type MOS tubes, respectively.
A twelfth type switch tube P12 and a twelfth type switch tube N10 form an inverter; the thirteenth type switch tube P13 and the eleventh type switch tube N11 form an inverter; the fourteenth type switch tube P14 and the twelfth type switch tube N12 form an inverter; a fifteenth type switch tube P15 and a thirteenth type switch tube N13 form an inverter; the sixteenth type P16 and the fourteenth type N14 form an inverter. I.e. the second inverse gain unit 240 is composed of 5 inverters.
The regulated signal output by the local regulator 130 is transmitted to the RC network circuit 210, the first inverse gain unit 230 and the second inverse gain unit 240, and the frequency selection of the RC network circuit 210 is used to amplify the gain of the first inverse gain unit 230 and the second inverse gain unit 240, thereby outputting an oscillation signal.
In the above embodiment, the current reference generating circuit 120 is not turned on when the system is powered on, so that the local voltage regulator 130 transmits the generated first signal to the starting circuit 110, and the starting circuit 110 transmits the second signal to the current reference generating circuit 120 according to the first signal; the current reference generating circuit 120 is further configured to be turned on when receiving the second signal, so that the local regulator 130 outputs a regulated voltage signal, and then the regulated voltage signal output by the local regulator 130 is transmitted to the RC network circuit 210 and the reverse gain circuit 220, and low power consumption oscillation output is realized through frequency selection of the RC network circuit 210 and gain amplification of the reverse gain circuit 220. The band-gap reference and the operational amplifier in the traditional mode and more analog circuits such as the divider resistor are not needed, the required current branch can be reduced to the lowest degree, the low-standby power consumption is suitable for the application occasions with extremely low standby power consumption, high efficiency is still achieved under low driving current, the power consumption of the circuit is reduced, meanwhile, the bias current is low, the range of the driving current is wide, and the energy efficiency is high.
In an embodiment, there is also provided a processor including the oscillator system of any one of the above.
For specific definitions of the oscillator system, reference may be made to the above definitions of the oscillator system, which are not described in detail here.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (10)
1. An oscillator system, comprising:
the voltage stabilizing circuit comprises a starting circuit, a current reference generating circuit and a local voltage stabilizing source; the current reference generating circuit is connected between the starting circuit and the local voltage stabilizing source, and the output end of the local voltage stabilizing source is connected with the starting circuit; the current reference generating circuit is configured to be not started when a system is powered on, so that the local voltage regulator transmits a generated first signal to the starting circuit, and the starting circuit transmits a second signal to the current reference generating circuit according to the first signal; the current reference generation circuit is also configured to be started when receiving the second signal, so that the local voltage regulator outputs a voltage-stabilizing signal;
an oscillation circuit comprising an RC network circuit and a reverse gain circuit; the RC network circuit is connected with the reverse gain circuit, and the reverse gain circuit is connected with the output end of the local voltage stabilizing source.
2. The oscillator system of claim 1, wherein the start-up circuit comprises a first type switch, a second type switch, a third type switch, a fourth type switch, a first type switch and a second type switch;
the source electrode of the first one-way switch tube is connected with a power supply, the grid electrode of the first one-way switch tube is connected with the drain electrode of the first one-way switch tube, and the drain electrode of the first one-way switch tube is connected with the source electrode of the second one-way switch tube; the drain electrode of the second type switch tube is connected with the source electrode of the third type switch tube, the drain electrode of the third type switch tube is connected with the source electrode of the fourth type switch tube, the drain electrode of the fourth type switch tube is connected with the drain electrode of the first type switch tube, and the source electrode of the first type switch tube is connected with the ground wire; the grid electrode of the second type switch tube, the grid electrode of the third type switch tube, the grid electrode of the fourth type switch tube and the grid electrode of the first type switch tube are respectively connected with the output end of the local voltage stabilizing source;
the grid electrode of the second type switch tube is connected with the drain electrode of the fourth type switch tube, the drain electrode of the second type switch tube is connected with the current reference generating circuit, and the source electrode of the second type switch tube is connected with the ground wire.
3. The oscillator system of claim 2, wherein the current reference generating circuit comprises a fifth type I switch, a sixth type I switch, a third type II switch, a fourth type II switch, a first transistor, a second transistor, and a first resistor;
the source electrode of the fifth type switch tube is connected with the power supply, the drain electrode of the fifth type switch tube is connected with the drain electrode of the third type switch tube, and the grid electrode of the fifth type switch tube is connected with the grid electrode of the sixth type switch tube;
the source electrode of the sixth type switch tube is connected with the power supply, and the drain electrode of the sixth type switch tube is respectively connected with the grid electrode of the sixth type switch tube, the drain electrode of the fourth type switch tube, the drain electrode of the second type switch tube and the local voltage stabilizing source;
the drain electrode of the second type switch tube is connected with the grid electrode of the second type switch tube, the source electrode of the second type switch tube is connected with the collector electrode of the first triode, and the grid electrode of the second type switch tube is connected with the grid electrode of the second type switch tube; the source electrode of the second type switch tube is connected with the first end of the first resistor, and the second end of the first resistor is connected with the collector electrode of the second triode; the grid electrode of the second triode is respectively connected with the grid electrode of the first triode and the emitting electrode of the second triode; and the emitting electrode of the first triode and the emitting electrode of the second triode are respectively connected with a ground wire.
4. The oscillator system of claim 3, wherein the local regulator includes a seventh type switch, an eighth type switch, a fifth type switch, and a sixth type switch;
the grid electrode of the seventh type switch tube is connected with the drain electrode of the sixth type switch tube, the source electrode of the seventh type switch tube is connected with the power supply, and the drain electrode of the seventh type switch tube is respectively connected with the drain electrode of the fifth type switch tube and the grid electrode of the sixth type switch tube;
the source electrode of the fifth type switching tube is connected with the source electrode of the eighth type switching tube, the drain electrode of the eighth type switching tube is connected with the ground wire, and the grid electrode of the eighth type switching tube is connected with the drain electrode of the eighth type switching tube; and the drain electrode of the sixth type switch tube is connected with the power supply, and the source electrode of the sixth type switch tube is respectively connected with the grid electrode of the fifth type switch tube, the oscillating circuit and the starting circuit.
5. The oscillator system of claim 4, wherein the local regulator further comprises a first capacitor;
and the first end of the first capacitor is connected with the source electrode of the sixth type switch tube, and the second end of the first capacitor is connected with the ground wire.
6. The oscillator system according to any one of claims 1 to 5, characterized in that the inverse gain circuit comprises a first inverse gain unit and a second inverse gain unit;
the first reverse gain unit and the second reverse gain unit are respectively connected with the output end of the local voltage stabilizing source; the RC network circuit is connected between the first reverse gain unit and the second reverse gain unit.
7. The oscillator system of claim 6, wherein the RC network circuit includes a second resistor and a second capacitor;
the first end of the second capacitor is connected with the first reverse gain unit, and the second end of the second capacitor is connected with the second reverse gain unit; the first end of the second resistor is connected with the first reverse gain unit, and the second end of the second resistor is connected with the second reverse gain unit.
8. The oscillator system of claim 7, wherein the first inverting gain unit comprises a ninth type-one switch, an eleventh type switch, a tenth type-one switch, a seventh type switch, an eighth type switch, and a ninth type switch;
the source electrode of the ninth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the ninth type switch tube is connected with the drain electrode of the seventh type switch tube, and the source electrode of the seventh type switch tube is connected with the ground wire; the grid electrode of the ninth type-I switch tube is respectively connected with the grid electrode of the seventh type-I switch tube, the first end of the second resistor and the second reverse gain unit;
the source electrode of the eleventh type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the eleventh type switch tube is connected with the drain electrode of the eighth type switch tube, and the source electrode of the eighth type switch tube is connected with the ground wire; the grid electrode of the eleventh type switch tube is respectively connected with the grid electrode of the eighth type switch tube, the drain electrode of the ninth type switch tube and the drain electrode of the seventh type switch tube;
a source electrode of the eleventh type switch tube is connected with an output end of the local voltage stabilizing source, a drain electrode of the eleventh type switch tube is respectively connected with a drain electrode of the ninth type switch tube and a first end of the second capacitor, and a source electrode of the ninth type switch tube is connected with a ground wire; and the grid electrode of the eleventh type switch tube is respectively connected with the grid electrode of the ninth type switch tube, the drain electrode of the eleventh type switch tube and the drain electrode of the eighth type switch tube.
9. The oscillator system of claim 8, wherein the second inverse gain unit comprises a twelfth type switch, a thirteenth type switch, a fourteenth type switch, a fifteenth type switch, a sixteenth type switch, a twelfth type switch, an eleventh type switch, a twelfth type switch, a thirteenth type switch and a fourteenth type switch;
the source electrode of the twelfth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the twelfth type switch tube is connected with the drain electrode of the twelfth type switch tube, and the source electrode of the twelfth type switch tube is connected with the ground wire; the grid electrode of the twelfth first-type switching tube is respectively connected with the grid electrode of the twelfth switching tube, the second end of the second capacitor and the second end of the second resistor;
the source electrode of the thirteenth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the thirteenth type switch tube is connected with the drain electrode of the eleventh type switch tube, and the source electrode of the eleventh type switch tube is connected with the ground wire; the grid electrode of the thirteenth type switching tube is respectively connected with the grid electrode of the eleventh type switching tube, the drain electrode of the twelfth type switching tube and the drain electrode of the twelfth type switching tube;
the source electrode of the fourteenth first-type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the fourteenth first-type switch tube is connected with the drain electrode of the twelfth second-type switch tube, and the source electrode of the twelfth second-type switch tube is connected with the ground wire; the grid electrode of the fourteenth type switch tube is respectively connected with the grid electrode of the twelfth type switch tube, the drain electrode of the thirteenth type switch tube and the drain electrode of the eleventh type switch tube;
the source electrode of the fifteenth type switch tube is connected with the output end of the local voltage stabilizing source, the drain electrode of the fifteenth type switch tube is connected with the drain electrode of the thirteenth type switch tube, and the source electrode of the thirteenth type switch tube is connected with the ground wire; the grid electrode of the fifteenth type switch tube is respectively connected with the grid electrode of the thirteenth type switch tube, the drain electrode of the fourteenth type switch tube and the drain electrode of the twelfth type switch tube;
a source electrode of the sixteenth type switch tube is connected with an output end of the local voltage stabilizing source, a drain electrode of the sixteenth type switch tube is respectively connected with a drain electrode of the fourteenth type switch tube, a grid electrode of the ninth type switch tube, a grid electrode of the seventh type switch tube and a first end of the second resistor, and a source electrode of the fourteenth type switch tube is connected with a ground wire; and the grid electrode of the sixteenth type switch tube is respectively connected with the grid electrode of the fourteenth type switch tube, the drain electrode of the fifteenth type switch tube and the drain electrode of the thirteenth type switch tube.
10. A processor comprising the oscillator system of any one of claims 1 to 9.
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| CN113489460A (en) * | 2021-07-02 | 2021-10-08 | 珠海市杰理科技股份有限公司 | RC oscillation circuit and RC oscillator |
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| US5021750A (en) * | 1989-04-03 | 1991-06-04 | Alcatel N.V. | CMOS oscillator |
| CN202261165U (en) * | 2011-09-21 | 2012-05-30 | 电子科技大学 | Annular voltage-controlled oscillator |
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