CN219592392U - Voltage frequency converter and electronic equipment - Google Patents
Voltage frequency converter and electronic equipment Download PDFInfo
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- CN219592392U CN219592392U CN202320426607.0U CN202320426607U CN219592392U CN 219592392 U CN219592392 U CN 219592392U CN 202320426607 U CN202320426607 U CN 202320426607U CN 219592392 U CN219592392 U CN 219592392U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
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Abstract
The utility model provides a voltage-frequency converter and electronic equipment, and relates to the technical field of voltage-frequency conversion. The voltage-frequency converter comprises a variable current circuit, a capacitor component, a first high-gain amplifying circuit, a second high-gain amplifying circuit, a Schmitt trigger, an inverter circuit, a digital circuit and a timing circuit; the variable current circuit is electrically connected with the first high-gain amplifying circuit, the second high-gain amplifying circuit and the capacitor component respectively, the capacitor component is grounded, the first high-gain amplifying circuit, the Schmitt trigger and the digital circuit are electrically connected in sequence, the second high-gain amplifying circuit, the inverter circuit and the digital circuit are electrically connected in sequence, and the output end of the digital circuit is electrically connected with the time sequence circuit. The utility model provides a voltage-frequency converter and electronic equipment, which have the advantages of relatively simple circuit structure, relatively low use cost and better performance.
Description
Technical Field
The utility model relates to the technical field of voltage frequency conversion, in particular to a voltage frequency converter and electronic equipment.
Background
The voltage-to-frequency converter VFC (Voltage Frequency Converter) is a device that performs an analog-to-digital conversion function, and converts an analog voltage amount into a pulse signal, and the frequency of the output pulse signal is proportional to the magnitude of an input voltage. The voltage frequency conversion may also be referred to as a volt frequency conversion. After converting the voltage signal into the pulse signal, the anti-interference capability of the signal can be obviously enhanced, and the remote transmission is facilitated. AD conversion can be realized through a counter interface with the singlechip.
The voltage-to-frequency converter is also called a Voltage Controlled Oscillator (VCO), abbreviated as voltage controlled oscillator. Voltage-to-frequency conversion is effectively a conversion technique between analog and digital quantities. When converting an analog signal (voltage or current) to a digital signal, the output of the converter is a series of rectangular waves with frequencies proportional to the amplitude of the analog signal, and it is apparent that the data is serial. This is different from the parallel output of the analog-to-digital converter commonly used at present, however, the resolution can be very high. Analog-to-digital conversion of the serial output is useful in digital control systems, which convert the analog error signal to a pulse signal proportional thereto to drive a stepper servo for fine control.
However, the circuit structure of the existing voltage-frequency converter is generally complex, and the use cost is high.
Disclosure of Invention
The utility model aims to provide a voltage-frequency converter and electronic equipment, which are used for solving the problems of complex circuit structure and high use cost of the voltage-frequency converter in the prior art.
In order to achieve the above object, the technical scheme adopted by the embodiment of the utility model is as follows:
in one aspect, an embodiment of the present utility model provides a voltage-to-frequency converter, where the voltage-to-frequency converter includes a variable current circuit, a capacitor assembly, a first high gain amplifying circuit, a second high gain amplifying circuit, a schmitt trigger, an inverter circuit, a digital circuit, and a timing circuit;
the variable current circuit is electrically connected with the first high-gain amplifying circuit, the second high-gain amplifying circuit and the capacitor assembly respectively, the capacitor assembly is further grounded, the first high-gain amplifying circuit, the Schmitt trigger and the digital circuit are electrically connected in sequence, the second high-gain amplifying circuit, the inverter circuit and the digital circuit are electrically connected in sequence, and the output end of the digital circuit is electrically connected with the time sequence circuit; wherein,,
the variable current circuit is used for providing a variable current signal, the first high-gain amplifying circuit and the second high-gain amplifying circuit are used for amplifying the variable current signal, the Schmitt trigger is used for converting the amplified signal into a digital signal, the digital circuit is used for processing the digital circuit and outputting a control signal, and the time sequence circuit is used for outputting the converted signal according to the control signal.
Optionally, the voltage-to-frequency converter further includes a first reset circuit, a first end of the first reset circuit is electrically connected to the output end of the variable current circuit, a second end of the first reset circuit is grounded, and a third end of the first reset circuit is electrically connected to the output end of the digital circuit; wherein,,
when the digital circuit outputs a reset signal, the first reset circuit is turned on.
Optionally, the voltage-frequency converter further includes a second reset circuit, a first end of the second reset circuit is electrically connected with the output end of the variable current circuit, a second end of the second reset circuit is grounded, and a third end of the second reset circuit is used for receiving the first driving signal and is turned on or off under the control of the first driving signal.
Optionally, the variable current circuit includes a transconductance amplifier and an output module, an input end of the transconductance amplifier is connected with a power supply, an input voltage and a second driving signal, and an output end of the transconductance amplifier is electrically connected with the output module and outputs a variable current signal through the output module.
Optionally, the output module includes a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube, a tenth switching tube, an eleventh switching tube, a twelfth switching tube, a thirteenth switching tube, a first resistor, a second resistor, and a third resistor, the first switching tube, the fourth switching tube, the eighth switching tube, and the first end of the twelfth switching tube are connected to a power supply, the control end of the first switching tube is electrically connected to the control end of the second switching tube, the control end of the first switching tube is electrically connected to the first end of the second switching tube, the control end of the second switching tube is electrically connected to the output end of the transconductance amplifier, the second end of the second switching tube is electrically connected to the first end of the third switching tube, the control end of the third switching tube is electrically connected to the first end of the third switching tube, the control end of the fifth switching tube is electrically connected to the control end of the fifth switching tube, the fifth switching tube is electrically connected to the control end of the fifth switching tube is electrically connected to the output end of the transconductance amplifier, the control end of the eighth switching tube is electrically connected with the second end and the control end of the twelfth switching tube respectively, the second end of the eighth switching tube is also electrically connected with the first end of the ninth switching tube, the control end of the ninth switching tube is electrically connected with the second end and the control end of the thirteenth switching tube respectively, the second end of the ninth switching tube is also electrically connected with the first end and the control end of the tenth switching tube respectively, the second end of the tenth switching tube is electrically connected with the first end of the eleventh switching tube, the second end of the eleventh switching tube is grounded, the second end of the twelfth switching tube is electrically connected with the first end of the thirteenth switching tube, and the second end of the thirteenth switching tube is grounded.
Optionally, the first high-gain amplifying circuit and the second high-gain amplifying circuit have the same circuit structure, and the first high-gain amplifying circuit and the second high-gain amplifying circuit each comprise a cascode structure.
Optionally, the schmitt trigger includes a first schmitt trigger and a second schmitt trigger, an input end of the first schmitt trigger is electrically connected with an output end of the first high-gain amplifying circuit, an output end of the first schmitt trigger is electrically connected with an input end of the second schmitt trigger, and an output end of the second schmitt trigger is electrically connected with the digital circuit.
Optionally, the digital circuit includes a first inverter, a first nor gate, a second inverter, a nand gate, a third inverter and a fourth inverter, where an input end of the first inverter is electrically connected to the schmitt trigger, an output end of the first inverter is electrically connected to a first input end of the first nor gate, an output end of the first nor gate is electrically connected to an input end of the second inverter, an output end of the second inverter is electrically connected to a first input end of the nand gate, a second input end of the nand gate is electrically connected to the inverter circuit, an output end of the nand gate is respectively electrically connected to an input end of the third inverter and an input end of the fourth inverter, an output end of the third inverter is electrically connected to a second input end of the first nor gate, and an output end of the fourth inverter is electrically connected to the sequential circuit.
Optionally, the timing circuit includes a first tristate signal gate, a second tristate signal gate, a third tristate signal gate, a fourth tristate signal gate, a fifth inverter, a sixth inverter, a seventh inverter, an eighth inverter, a second nor gate, and a third nor gate, where an input end of the first tristate signal gate is connected to the first enabling signal, the second enabling signal, and the first input signal, respectively, an output end of the first tristate signal gate is electrically connected to a first input end of the second nor gate, an output end of the second tristate signal gate is electrically connected to an output end of the second tristate signal gate, an input end of the fifth inverter is used for receiving a second input signal, an output end of the fifth inverter is electrically connected to a second input end of the second nor gate, an output end of the third nor gate is respectively connected to an input end of the second tristate signal gate, an output end of the second enabling signal gate, the second enabling signal is generated based on the control signal, an output end of the first tristate signal gate is electrically connected to a first input end of the third tristate signal gate, an output end of the third tristate signal gate is electrically connected to an output end of the third tristate signal gate.
On the other hand, the embodiment of the utility model also provides electronic equipment, which comprises the voltage-frequency converter.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a voltage-frequency converter and electronic equipment, wherein the voltage-frequency converter comprises a variable current circuit, a capacitor component, a first high-gain amplifying circuit, a second high-gain amplifying circuit, a Schmitt trigger, an inverter circuit, a digital circuit and a timing circuit; the variable current circuit is respectively and electrically connected with the first high-gain amplifying circuit, the second high-gain amplifying circuit and the capacitor component, the capacitor component is also grounded, the first high-gain amplifying circuit, the Schmitt trigger and the digital circuit are sequentially and electrically connected, the second high-gain amplifying circuit, the inverter circuit and the digital circuit are sequentially and electrically connected, and the output end of the digital circuit is electrically connected with the time sequence circuit; the variable current circuit is used for providing a variable current signal, the first high-gain amplifying circuit and the second high-gain amplifying circuit are used for amplifying the variable current signal, the Schmitt trigger is used for converting the amplified signal into a digital signal, the digital circuit is used for processing the digital circuit and outputting a control signal, and the time sequence circuit is used for outputting the converted signal according to the control signal. The voltage-frequency converter provided by the utility model has relatively less modules, so that the circuit structure is relatively simple and the use cost is relatively low. And the signal processing of the two paths of high-gain amplifying circuits is carried out, and the signal is finally output to the digital circuit to generate a control signal, so that the performance is better.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a voltage-to-frequency converter according to an embodiment of the utility model.
Fig. 2 is a schematic diagram of another module of the voltage-to-frequency converter according to an embodiment of the utility model.
Fig. 3 is a schematic circuit diagram of a variable current circuit according to an embodiment of the present utility model.
Fig. 4 is a schematic circuit diagram of a first high gain amplifying circuit and a second high gain amplifying circuit according to an embodiment of the present utility model.
Fig. 5 is a schematic circuit diagram of a first schmitt trigger and a second schmitt trigger according to an embodiment of the utility model.
Fig. 6 is a logic schematic diagram of a digital circuit according to an embodiment of the utility model.
Fig. 7 is a logic schematic diagram of a sequential circuit according to an embodiment of the utility model.
Fig. 8 is a schematic diagram of generation logic of a first enable signal and a second enable signal according to an embodiment of the present utility model.
In the figure: a 100-voltage frequency converter; 110-a variable current circuit; 120-a first high gain amplification circuit; 130-a second high gain amplification circuit; 140-a capacitive component; 150-schmitt trigger; 160-an inverter circuit; 170-a digital circuit; 180-timing circuit; 190-a first reset circuit; 200-a second reset circuit; a 111-transconductance amplifier; 112-an output module; 151-a first schmitt trigger; 152-a second schmitt trigger.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
As described in the background art, the circuit structure of the existing voltage-to-frequency converter is generally complex, and the use cost is high.
In order to solve the above problems, the present utility model provides a voltage-to-frequency converter, and the following exemplifies the voltage-to-frequency converter provided by the present utility model:
as an implementation, referring to fig. 1 and 2, the voltage-to-frequency converter 100 includes a variable current circuit 110, a capacitor assembly 140, a first high gain amplifying circuit 120, a second high gain amplifying circuit 130, a schmitt trigger 150, an inverter circuit 160, a digital circuit 170, and a timing circuit 180; the variable current circuit 110 is electrically connected to the first high-gain amplifying circuit 120, the second high-gain amplifying circuit 130 and the capacitor assembly 140, the capacitor assembly 140 is further grounded, the first high-gain amplifying circuit 120, the schmitt trigger 150 and the digital circuit 170 are sequentially electrically connected, the second high-gain amplifying circuit 130, the inverter circuit 160 and the digital circuit 170 are sequentially electrically connected, and an output end of the digital circuit 170 is electrically connected to the timing circuit 180; the variable current circuit 110 is configured to provide a variable current signal, the first high-gain amplifying circuit 120 and the second high-gain amplifying circuit 130 are configured to amplify the variable current signal, the schmitt trigger 150 is configured to convert the amplified signal into a digital signal, the digital circuit 170 is configured to process the digital circuit and output a control signal, and the timing circuit 180 is configured to output the converted signal according to the control signal.
The input end of the variable current circuit 110 is connected to the power voltage VDD, the current source I, and the input voltage Vin, and the output end thereof outputs the current IOUT to the first high-gain amplifying circuit 120 and the second high-gain amplifying circuit 130.
Specifically, referring to fig. 3, the variable current circuit 110 includes a transconductance amplifier 111 and an output module 112, wherein an input end of the transconductance amplifier 111 is respectively connected to a power supply, an input voltage and a second driving signal, and an output end of the transconductance amplifier 111 is electrically connected to the output module 112 and outputs a variable current signal through the output module 112.
The output module 112 includes a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, an eleventh switch tube, a twelfth switch tube, and a thirteenth switch tube (M1-M13 in the figure), a first resistor, a second resistor, and a third resistor (R1-R3 in the figure), wherein the first ends of the first switch tube, the fourth switch tube, the eighth switch tube, and the twelfth switch tube are connected to a power supply, the control ends of the first switch tube are respectively electrically connected to the control ends of the second end and the fourth switch tube, the second end of the first switch tube is also electrically connected to the first end of the second switch tube, the control end of the second switch tube is electrically connected to the output end of the transconductance amplifier 111, the second end of the second switch tube is electrically connected to the first end of the third switch tube, the control end of the third switching tube is electrically connected with the first end, the second end of the third switching tube is grounded through a first resistor, the second end of the third switching tube is also electrically connected with the input end of the transconductance amplifier 111, the second end of the fourth switching tube is electrically connected with the first end of the fifth switching tube, the second resistor and the third resistor form a voltage dividing unit, the control end of the fifth switching tube is electrically connected with the second resistor and the third resistor, the second end of the fifth switching tube is electrically connected with the first end of the sixth switching tube, the control end of the sixth switching tube is electrically connected with the first end of the first switching tube and the control end of the tenth switching tube respectively, the control end of the seventh switching tube is electrically connected with the first end of the seventh switching tube and the control end of the eleventh switching tube respectively, the second end of the seventh switching tube is grounded, the control end of the eighth switching tube is connected with the second end of the eighth switching tube respectively, the control end of the twelfth switching tube is electrically connected, the second end of the eighth switching tube is also electrically connected with the first end of the ninth switching tube, the control end of the ninth switching tube is respectively electrically connected with the second end and the control end of the thirteenth switching tube, the second end of the ninth switching tube is also respectively electrically connected with the first end and the control end of the tenth switching tube, the second end of the tenth switching tube is electrically connected with the first end of the eleventh switching tube, the second end of the eleventh switching tube is grounded, the second end of the twelfth switching tube is electrically connected with the first end of the thirteenth switching tube, and the second end of the thirteenth switching tube is grounded.
It can be understood that in the above circuit structure, the first switching tube and the fourth switching tube form a current mirror, the sixth switching tube, the seventh switching tube, the tenth switching tube and the eleventh switching tube also form a current mirror, and the eighth switching tube, the ninth switching tube, the twelfth switching tube and the thirteenth switching tube also form a current mirror.
The utility model is not limited to the type of the above-mentioned switching tube, for example, the switching tube may be a triode, or may be a MOS tube or an IGBT tube.
As an implementation manner, as shown in fig. 2, the capacitor assembly 140 includes a first capacitor and a second capacitor, where the first capacitor and the second capacitor are connected in parallel, one end of the first capacitor and one end of the second capacitor are electrically connected to the output terminal of the variable current circuit 110, and the other end of the first capacitor and the other end of the second capacitor are grounded. By setting the first capacitor and the second capacitor, the charging and discharging effects can be realized.
The voltage-to-frequency converter 100 further includes a first reset circuit 190, a first end of the first reset circuit 190 is electrically connected to the output end of the variable current circuit 110, a second end of the first reset circuit 190 is grounded, and a third end of the first reset circuit 190 is electrically connected to the output end of the digital circuit 170; wherein the first reset circuit 190 is turned on when the digital circuit 170 outputs a reset signal.
By providing the first reset circuit 190, the system can be automatically reset when the output voltage is too high, so as to realize the protection function. The first reset circuit 190 may include a MOS transistor, and when the MOS transistor is turned on, the output terminal of the variable current circuit 110 is grounded, so as to implement circuit reset.
The voltage-to-frequency converter 100 further includes a second reset circuit 200, a first end of the second reset circuit 200 is electrically connected to the output end of the variable current circuit 110, a second end of the second reset circuit 200 is grounded, and a third end of the second reset circuit 200 is configured to receive the first driving signal and is turned on or off under the control of the first driving signal. The second reset circuit 200 also includes a MOS transistor, so that when circuit reset is required, a high level signal can be input to the gate of the MOS transistor, so that the second reset circuit 200 is turned on, and the output terminal of the variable current circuit 110 is grounded, so that circuit reset can be realized.
As an implementation manner, referring to fig. 4, the first high-gain amplifying circuit 120 and the second high-gain amplifying circuit 130 have the same circuit structure, and the first high-gain amplifying circuit 120 and the second high-gain amplifying circuit 130 each include a cascode structure.
The first high-gain amplifying circuit 120 and the second high-gain amplifying circuit 130 each include a switching tube Q14-Q38, the specific connection relationship of which is shown in fig. 4, and the switching tubes may be MOS tubes.
As one implementation, the schmitt trigger 150 includes a first schmitt trigger 151150 and a second schmitt trigger 152150, an input of the first schmitt trigger 151150 is electrically connected to an output of the first high-gain amplifying circuit 120, an output of the first schmitt trigger 151150 is electrically connected to an input of the second schmitt trigger 152150, and an output of the second schmitt trigger 152150 is electrically connected to the digital circuit 170.
Referring to fig. 5, the first schmitt trigger 151150 and the second schmitt trigger 152150 have the same circuit structure, and each of the first schmitt trigger 151150 and the second schmitt trigger 152150 includes a switching transistor Q39-Q44, wherein the switching transistors Q39, Q40, and Q43 are P-type transistors, and the switching transistors Q41, Q42, and Q44 are N-type transistors.
As an implementation manner, referring to fig. 6, the digital circuit 170 includes a first inverter NOT1, a first NOR gate NOR1, a second inverter NOT2, a NAND gate NAND, a third inverter NOT3, and a fourth inverter NOT4, wherein an input end of the first inverter is electrically connected to the schmitt trigger 150, an output end of the first inverter is electrically connected to a first input end of the first NOR gate, an output end of the first NOR gate is electrically connected to an input end of the second inverter, an output end of the second inverter is electrically connected to a first input end of the NAND gate, a second input end of the NAND gate is electrically connected to the inverter circuit 160, an output end of the NAND gate is respectively electrically connected to an input end of the third inverter and an input end of the fourth inverter, an output end of the third inverter is electrically connected to a second input end of the first NOR gate, and an output end of the fourth inverter is electrically connected to the timing circuit 180.
As an implementation manner, referring to fig. 7, the timing circuit 180 includes a first tri-state signal gate T1, a second tri-state signal gate T2, a third tri-state signal gate T3, a fourth tri-state signal gate T4, a fifth inverter NOT5, a sixth inverter NOT6, a seventh inverter NOT7, an eighth inverter NOT8, a second NOR gate NOR2, and a third NOR gate NOR3, where an input end of the first tri-state signal gate is connected to the first enable signal, the second enable signal, and the first input signal, respectively, the first enable signal, the second enable signal are generated based on a control signal, an output end of the first tri-state signal gate is electrically connected to a first input end of the second NOR gate, an output end of the fifth inverter is electrically connected to a second input end of the second NOR gate, a second input end of the third NOR gate, an output end of the second NOR gate is electrically connected to a third input end of the third inverter, an output end of the third inverter is electrically connected to an output end of the third inverter, and an output end of the third inverter is electrically connected to an output end of the third inverter.
Referring to fig. 8, the input end of each tri-state signal gate inputs a first enable signal CN and a second enable signal C, the first enable signal CN and the second enable signal C are generated based on a control signal, and the first enable signal CN and the second enable signal C are opposite signals.
Based on the above implementation manner, the embodiment of the present utility model further provides an electronic device, which includes the voltage-to-frequency converter 100 described above. For example, the electronic device may be a device with a servo motor, and the signal generated by the voltage to frequency converter 100 may control the operation of the servo motor.
In summary, the present utility model provides a voltage-to-frequency converter and an electronic device, wherein the voltage-to-frequency converter includes a variable current circuit, a capacitor, a first high gain amplifying circuit, a second high gain amplifying circuit, a schmitt trigger, an inverter circuit, a digital circuit, and a timing circuit; the variable current circuit is respectively and electrically connected with the first high-gain amplifying circuit, the second high-gain amplifying circuit and the capacitor component, the capacitor component is also grounded, the first high-gain amplifying circuit, the Schmitt trigger and the digital circuit are sequentially and electrically connected, the second high-gain amplifying circuit, the inverter circuit and the digital circuit are sequentially and electrically connected, and the output end of the digital circuit is electrically connected with the time sequence circuit; the variable current circuit is used for providing a variable current signal, the first high-gain amplifying circuit and the second high-gain amplifying circuit are used for amplifying the variable current signal, the Schmitt trigger is used for converting the amplified signal into a digital signal, the digital circuit is used for processing the digital circuit and outputting a control signal, and the time sequence circuit is used for outputting the converted signal according to the control signal. The voltage-frequency converter provided by the utility model has relatively less modules, so that the circuit structure is relatively simple and the use cost is relatively low. And the signal processing of the two paths of high-gain amplifying circuits is carried out, and the signal is finally output to the digital circuit to generate a control signal, so that the performance is better.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The voltage-frequency converter is characterized by comprising a variable current circuit, a capacitor component, a first high-gain amplifying circuit, a second high-gain amplifying circuit, a Schmitt trigger, an inverter circuit, a digital circuit and a time sequence circuit;
the variable current circuit is electrically connected with the first high-gain amplifying circuit, the second high-gain amplifying circuit and the capacitor assembly respectively, the capacitor assembly is further grounded, the first high-gain amplifying circuit, the Schmitt trigger and the digital circuit are electrically connected in sequence, the second high-gain amplifying circuit, the inverter circuit and the digital circuit are electrically connected in sequence, and the output end of the digital circuit is electrically connected with the time sequence circuit; wherein,,
the variable current circuit is used for providing a variable current signal, the first high-gain amplifying circuit and the second high-gain amplifying circuit are used for amplifying the variable current signal, the Schmitt trigger is used for converting the amplified signal into a digital signal, the digital circuit is used for processing the digital circuit and outputting a control signal, and the time sequence circuit is used for outputting the converted signal according to the control signal.
2. The voltage-to-frequency converter of claim 1, further comprising a first reset circuit having a first end electrically connected to the output of the variable current circuit, a second end grounded, and a third end electrically connected to the output of the digital circuit; wherein,,
when the digital circuit outputs a reset signal, the first reset circuit is turned on.
3. The voltage-to-frequency converter of claim 1, further comprising a second reset circuit having a first end electrically connected to the output of the variable current circuit, a second end grounded, and a third end for receiving the first drive signal and being turned on or off under control of the first drive signal.
4. The voltage to frequency converter of claim 1 wherein the variable current circuit comprises a transconductance amplifier and an output module, the input of the transconductance amplifier being connected to a power supply, an input voltage, and a second drive signal, respectively, the output of the transconductance amplifier being electrically connected to the output module and outputting a variable current signal through the output module.
5. The voltage-to-frequency converter of claim 4 wherein said output module comprises a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube, a tenth switching tube, an eleventh switching tube, a twelfth switching tube, and a thirteenth switching tube, a first resistor, a second resistor, and a third resistor, said first switching tube, said fourth switching tube, said eighth switching tube, and said first end of said twelfth switching tube are connected to a power supply, said control end of said first switching tube is electrically connected to a control end of said second switching tube, said second end of said first switching tube is also electrically connected to a first end of said second switching tube, said control end of said second switching tube is electrically connected to an output end of said transconductance amplifier, said second end of said second switching tube is electrically connected to a third end of said third switching tube, said second end of said third switching tube is electrically connected to a fifth switching tube, said control end of said third switching tube is electrically connected to a fifth switching tube, said third switching tube is electrically connected to a control end of said fifth switching tube, said fifth switching tube is electrically connected to a control end of said third switching tube, said fifth switching tube is electrically connected to a control end of said fourth switching tube, said fourth switching tube is electrically connected to a control end of said second switching tube, said second switching tube is electrically connected to said output end of said second switching tube, said third switching tube respectively, the control end of the seventh switching tube is electrically connected with the first end and the control end of the eleventh switching tube respectively, the second end of the seventh switching tube is grounded, the control end of the eighth switching tube is electrically connected with the second end and the control end of the twelfth switching tube respectively, the second end of the eighth switching tube is also electrically connected with the first end of the ninth switching tube, the control end of the ninth switching tube is electrically connected with the second end and the control end of the thirteenth switching tube respectively, the second end of the ninth switching tube is also electrically connected with the first end and the control end of the tenth switching tube respectively, the second end of the tenth switching tube is electrically connected with the first end of the eleventh switching tube, the second end of the eleventh switching tube is grounded, the second end of the twelfth switching tube is electrically connected with the first end of the thirteenth switching tube, and the second end of the thirteenth switching tube is grounded.
6. The voltage-to-frequency converter of claim 1, wherein the first high-gain amplification circuit and the second high-gain amplification circuit are identical in circuit structure, and wherein the first high-gain amplification circuit and the second high-gain amplification circuit each comprise a cascode structure.
7. The voltage-to-frequency converter of claim 1, wherein the schmitt trigger comprises a first schmitt trigger and a second schmitt trigger, an input of the first schmitt trigger being electrically connected to an output of the first high-gain amplification circuit, an output of the first schmitt trigger being electrically connected to an input of the second schmitt trigger, an output of the second schmitt trigger being electrically connected to the digital circuit.
8. The voltage-to-frequency converter of claim 1, wherein the digital circuit comprises a first inverter, a first nor gate, a second inverter, a nand gate, a third inverter, and a fourth inverter, wherein an input of the first inverter is electrically connected to the schmitt trigger, an output of the first inverter is electrically connected to a first input of the first nor gate, an output of the first nor gate is electrically connected to an input of the second inverter, an output of the second inverter is electrically connected to a first input of the nand gate, a second input of the nand gate is electrically connected to the inverter circuit, an output of the nand gate is electrically connected to an input of the fourth inverter, respectively, an output of the third inverter is electrically connected to a second input of the first nor gate, and an output of the fourth inverter is electrically connected to the circuit.
9. The voltage-to-frequency converter of claim 1 wherein said timing circuit comprises a first tri-state signal gate, a second tri-state signal gate, a third tri-state signal gate, a fourth tri-state signal gate, a fifth inverter, a sixth inverter, a seventh inverter, an eighth inverter, a second nor gate, and a third nor gate, wherein an input of said first tri-state signal gate is electrically connected to a first enable signal, a second enable signal, and a first input signal, respectively, an output of said first tri-state signal gate is electrically connected to a first input of said second nor gate, an output of said second tri-state signal gate is electrically connected to an output of said second tri-state signal gate, a fifth inverter is used to receive a second input signal, an output of said fifth inverter is electrically connected to a second input of said second nor gate, a second input of said third nor gate, an output of said second nor gate is electrically connected to a third input of said third nor gate, an output of said tri-state signal is electrically connected to a third input of said third inverter, an output of said third inverter is electrically connected to a third input of said third inverter.
10. An electronic device comprising a voltage to frequency converter as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320426607.0U CN219592392U (en) | 2023-03-08 | 2023-03-08 | Voltage frequency converter and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320426607.0U CN219592392U (en) | 2023-03-08 | 2023-03-08 | Voltage frequency converter and electronic equipment |
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| Publication Number | Publication Date |
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| CN219592392U true CN219592392U (en) | 2023-08-25 |
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| CN202320426607.0U Active CN219592392U (en) | 2023-03-08 | 2023-03-08 | Voltage frequency converter and electronic equipment |
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| CN (1) | CN219592392U (en) |
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- 2023-03-08 CN CN202320426607.0U patent/CN219592392U/en active Active
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