CN114389580A - Resistor module, clock circuit, integrated circuit, and electronic device - Google Patents
Resistor module, clock circuit, integrated circuit, and electronic device Download PDFInfo
- Publication number
- CN114389580A CN114389580A CN202111616382.7A CN202111616382A CN114389580A CN 114389580 A CN114389580 A CN 114389580A CN 202111616382 A CN202111616382 A CN 202111616382A CN 114389580 A CN114389580 A CN 114389580A
- Authority
- CN
- China
- Prior art keywords
- resistance
- signal
- circuit
- unit
- trimming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/01—Details
- H03K3/011—Modifications of generator to compensate for variations in physical values, e.g. voltage, temperature
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/06—Clock generators producing several clock signals
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The embodiment of the application provides a resistor module, a clock circuit, an integrated circuit and electronic equipment, wherein the resistor module comprises a resistor unit, a temperature detection unit and a trimming control unit; the resistance unit at least comprises a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; and the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module provided by the embodiment can effectively reduce the second-order temperature coefficient.
Description
Technical Field
The present application relates to the field of electronic circuit technology, and in particular, to a resistor module, a clock circuit, an integrated circuit, and an electronic device.
Background
A clock system on chip is a key module of an Integrated Circuit (IC), and particularly in applications based on-chip timing or signal measurement, a highly accurate and low-temperature drift clock reference is required.
Conventional on-chip clock systems typically employ resistors with opposite temperature coefficients combined into a resistor with a zero temperature coefficient to reduce the variation of clock frequency with temperature. However, the above method can only make the first order temperature coefficient of the resistor approximately zero, and the second order temperature coefficient still exists. The second order temperature coefficient is embodied in the form of a parabolic change in resistance with temperature change.
In some application scenarios of accurate timing or signal sampling, the requirement on the clock frequency is very strict, and an on-chip clock with extremely low temperature drift is required to provide a timing or sampling pulse, so how to reduce the second-order temperature coefficient is a research hotspot of those skilled in the art.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a resistor module, a clock circuit, an integrated circuit, and an electronic device to solve the above technical problems.
In a first aspect, an embodiment of the present application provides a resistor module, which includes a resistor unit, a temperature detection unit, and a trimming control unit; the resistance unit at least comprises a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; and the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal.
In a second aspect, an embodiment of the present application further provides a clock circuit, which includes an oscillation circuit and the above resistance module, where the resistance module is connected to the oscillation circuit.
In a third aspect, an embodiment of the present application further provides an integrated circuit, including the clock circuit as described above.
In a fourth aspect, an embodiment of the present application further provides an electronic device, which includes a device main body and the integrated circuit as described above disposed in the device main body.
The resistance module comprises a resistance unit, a temperature detection unit and a trimming control unit, wherein the resistance unit at least comprises a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module of this application embodiment adjusts the resistance ratio of first resistance and second resistance through the change situation control resistance unit according to the temperature of trimming control unit, and then can further reduce the resistance module along with the change volume of temperature to effectively reduce this resistance module's second order temperature coefficient.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a block diagram of a resistor module according to an embodiment of the present application.
Fig. 2 shows a temperature characteristic of a resistor of a prior art resistor module.
Fig. 3 shows a block diagram of a resistor unit in a resistor module provided in an embodiment of the present application.
Fig. 4 shows a temperature characteristic curve diagram of a resistance module provided by the embodiment of the application.
Fig. 5 shows a block diagram of a clock circuit provided in an embodiment of the present application.
Fig. 6 shows a schematic structural diagram of a clock circuit provided in an embodiment of the present application.
Fig. 7 is a schematic diagram illustrating an operation principle of a clock signal provided by an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In order to make the technical solutions of the present application 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. It is to be understood that the embodiments described are only a few embodiments of the present application and 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.
A clock system on chip is a key module of an Integrated Circuit (IC), and particularly in applications based on-chip timing or signal measurement, a highly accurate and low-temperature drift clock reference is required.
Conventional on-chip clock systems typically employ resistors with opposite temperature coefficients combined into a resistor with a zero temperature coefficient to reduce the variation of clock frequency with temperature. However, the above method can only make the first order temperature coefficient of the resistor approximately zero, and the second order temperature coefficient still exists. The second order temperature coefficient is embodied in the form of a parabolic change in resistance with temperature change.
In some application scenarios of accurate timing or signal sampling, the requirement on the clock frequency is very strict, and an on-chip clock with extremely low temperature drift is required to provide a timing or sampling pulse, so how to reduce the second-order temperature coefficient is a research hotspot of those skilled in the art.
In order to solve the above technical problem, the inventors have made long-term studies and propose a resistance module, a clock circuit, an integrated circuit, and an electronic device in the embodiments of the present application, where the resistance module includes a resistance unit, a temperature detection unit, and a trimming control unit, the resistance unit includes at least a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module of this application embodiment adjusts the resistance ratio of first resistance and second resistance through the change situation control resistance unit according to the temperature of trimming control unit, and then can further reduce the resistance module along with the change volume of temperature to effectively reduce this resistance module's second order temperature coefficient.
As shown in fig. 1, fig. 1 shows a block diagram of a resistor module 100 provided in an embodiment of the present application, where the resistor module 100 includes a resistor unit 110, a temperature detection unit 120, and a trimming control unit 130. The resistance unit 110 includes at least a first resistance 1121 and a second resistance 1122; the temperature detection unit 120 is configured to detect a temperature and output a temperature detection signal; the trimming control unit 130 is connected to the temperature detection unit 120 and the resistance module 100, and the trimming control unit 130 is configured to send a trimming signal to the resistance unit 110 according to the temperature detection signal, so that the resistance unit 110 adjusts the resistance ratio of the second resistance 1122 of the first resistance 1121 according to the trimming signal.
The first resistor 1121 and the second resistor 1122 in the resistor unit 110 have opposite temperature coefficients, i.e., have different temperature characteristics. For example, the first resistor 1121 may be a resistor having a positive temperature coefficient, and the second resistor 1122 may be a resistor having a negative temperature coefficient; for another example, the first resistor 1121 may also be a resistor with a negative temperature coefficient, and the second resistor 1122 may also be a resistor with a positive temperature coefficient. The first resistor 1121 and the second resistor 1122 having opposite temperature coefficients cancel each other out, so that the temperature coefficient of the resistor unit 110 is approximately zero, that is, the first-order temperature coefficient of the resistor unit 110 is approximately zero. However, if only the first-order temperature coefficient of the resistor unit 110 is eliminated by the combination of the first resistor 1121 and the second resistor 1122 with opposite temperature coefficients, the second-order temperature coefficient still exists, and as shown in fig. 2, the second-order temperature coefficient is embodied in that the resistance value of the resistor unit 110 changes in a parabolic manner with temperature.
In this embodiment, the temperature detection unit 120 may detect the temperature of the resistance unit 110. In some embodiments, the temperature detecting unit 120 may also detect an ambient temperature around the resistance unit 110, and then output a temperature detection signal to the trimming control unit 130. It is understood that the temperature detection signal may indicate a temperature change of the resistance unit 110 or a temperature change of an environment around the resistance unit 110.
The trimming control unit 130 receives the temperature detection signal output by the temperature detection unit 120, and outputs a trimming signal to the resistance unit 110 according to the temperature detection signal, and the resistance unit 110 receives the trimming signal and then adjusts the resistance ratio of the first resistance 1121 and the second resistance 1122 according to the trimming signal. That is, when the temperature of the resistor unit 110 changes, the trimming control unit 130 outputs a corresponding trimming signal to the resistor unit 110 according to the current temperature of the resistor unit 110, so that the resistor unit 110 adjusts the resistance ratio of the first resistor 1121 and the second resistor 1122 to a corresponding value according to the trimming signal. The resistance ratio of the first resistor 1121 and the second resistor 1122 represents the ratio of the positive temperature coefficient resistor and the negative temperature coefficient resistor in the resistor unit 110, and by adjusting the ratio of the positive temperature coefficient resistor and the negative temperature coefficient resistor in the resistor unit 110 in real time, the temperature curve of the resistance value of the resistor unit 110 can be adjusted in real time in the process of temperature change, so that the second-order temperature coefficient of the resistor unit 110 is effectively reduced.
In some embodiments, as shown in fig. 3, the resistance unit 110 includes a trimming circuit 111 and a resistance circuit 112. The resistor circuit 112 includes at least the first resistor 1121 and the second resistor 1122. The trimming circuit 111 is configured to adjust a resistance ratio of the first resistor 1121 and the second resistor 1122 in the resistor circuit 112 according to the trimming signal output by the trimming control unit 130. Specifically, the trimming circuit 111 may adjust a resistance value of at least one of the first resistor and the second resistor according to the trimming signal to adjust a resistance ratio of the first resistor 1121 and the second resistor 1122. Alternatively, the trimming circuit 111 may adjust only the resistance values of the first resistor 1121 or the second resistor 1122 according to the trimming signal, or may adjust the resistance values of the first resistor 1121 and the second resistor 1122 together according to the trimming signal.
In one mode, the first resistor 1121 and the second resistor 1122 may be resistor strings including a plurality of resistors, respectively, and the trimming circuit 111 may include a plurality of switches connected to the first resistor 1121 and the second resistor 1122. The trimming circuit 111 correspondingly controls the on/off of the switches according to the trimming signal, and further respectively adjusts the resistance values of the first resistor 1121 and the second resistor 1122, thereby adjusting the resistance ratio of the first resistor 1121 and the second resistor 1122.
In some embodiments, the trimming control unit 130 is configured to output the trimming signal according to a temperature range in which the temperature detection signal is located and a preset corresponding relationship, where the preset corresponding relationship is a corresponding relationship between the temperature range in which the temperature detection signal is located and the resistance ratio. The resistance unit 110 adjusts the first resistance 1121 and the second resistance 1122 to corresponding resistance ratios according to the trimming signal.
Taking three preset temperature intervals as an example, the first preset temperature interval corresponds to a first ratio, the second preset temperature interval corresponds to a second ratio, and the third preset temperature interval corresponds to a third ratio. The trimming control unit 130 is configured to send a first trimming signal to the resistance unit 110 when the temperature detection signal is in a first preset temperature interval, and the resistance unit 110 is configured to adjust a resistance ratio of the first resistance 1121 and the second resistance 1122 to a first ratio according to the first trimming signal; the trimming control unit 130 is further configured to send a second trimming signal to the resistance unit 110 when the temperature detection signal is in a second preset temperature interval, and the resistance unit 110 is further configured to adjust a resistance ratio of the first resistance 1121 and the second resistance 1122 to a second ratio according to the second trimming signal; the trimming control unit 130 is further configured to send a third trimming signal to the resistance unit 110 when the temperature detection signal is in a third preset temperature interval, and the resistance unit 110 is further configured to adjust a resistance ratio of the first resistance 1121 and the second resistance 1122 to a third ratio according to the third trimming signal.
Specifically, as shown by the solid line in fig. 4, as the temperature of the resistance unit 110 increases, when the current temperature of the resistance unit 110 is less than the first threshold temperature Ttrig1, the trimming control unit 130 outputs a corresponding first trimming signal, so that the resistance ratio of the first resistance 1121 and the second resistance 1122 is maintained at a first ratio when the current temperature of the resistance unit 110 is less than the first threshold temperature Ttrig1, and when the current temperature of the resistance unit 110 is within a temperature interval less than the first threshold temperature Ttrig1, the temperature curve of the resistance unit 110 is curve a. When the current temperature of the resistance unit 110 is greater than or equal to the first threshold temperature Ttrig1 and less than the second threshold temperature Ttrig2, the trimming control unit 130 outputs a corresponding second trimming signal, so that the resistance ratio of the first resistance 1121 and the second resistance 1122 is maintained as the second ratio when the current temperature of the resistance unit 110 is greater than or equal to the first threshold temperature Ttrig1 and less than the second threshold temperature Ttrig2, and at this time, when the current temperature of the resistance unit 110 is within a temperature interval greater than or equal to the first threshold temperature Ttrig1 and less than the second threshold temperature Ttrig2, the temperature curve of the resistance unit 110 is a curve B. When the current temperature of the resistor unit 110 is greater than or equal to the second threshold temperature Ttrig2, the trimming control unit 130 outputs a corresponding third trimming signal, so that the resistance ratio of the first resistor 1121 and the second resistor 1122 is maintained at the third ratio when the current temperature of the resistor unit 110 is greater than or equal to the second threshold temperature Ttrig2, and at this time, when the current temperature of the resistor unit 110 is in the temperature interval greater than or equal to the second threshold temperature Ttrig2, the temperature curve of the resistor unit 110 is the curve C.
It can be seen that when the resistance ratio of the first resistor 1121 and the second resistor 1122 is changed from the first ratio to the second ratio, the temperature curve of the resistance value of the resistor unit 110 is changed from the curve a to the curve B, and when the resistance ratio of the first resistor 1121 and the second resistor 1122 is changed from the second ratio to the third ratio, the temperature curve of the resistance value of the resistor unit 110 is changed from the curve B to the curve C. Through trimming the temperature curve of the resistance value of the resistance unit 110, the temperature curve of the resistance value of the resistance unit 110 is stably maintained within a smaller variation range delta on the whole, so that the variation of the resistance value of the resistance unit 110 along with the temperature is effectively reduced, that is, the second-order temperature coefficient of the resistance unit 110 is effectively reduced.
The resistance module provided by the embodiment of the application comprises a resistance unit, a temperature detection unit and a trimming control unit, wherein the resistance unit at least comprises a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module of this application embodiment adjusts the resistance ratio of first resistance and second resistance through the change situation control resistance unit according to the temperature of trimming control unit, and then can further reduce the resistance module along with the change volume of temperature to effectively reduce this resistance module's second order temperature coefficient.
As shown in fig. 5, an embodiment of the present application further provides a clock circuit 200, where the clock circuit 200 includes an oscillation circuit 210 and the above-mentioned resistance module 100. The resistance module 100 is connected to the oscillation circuit 210.
In one form, the oscillator circuit 210 is an RC oscillator circuit. Taking the RC oscillation circuit as an example, the oscillation circuit 210 includes a charging/discharging circuit 211, a comparing circuit 212, and a clock control circuit 213; the charge and discharge circuit 211 is configured to perform charge and discharge with an input signal and output a voltage signal; the comparison circuit 212 is configured to compare the voltage signal with a preset reference voltage signal and output a comparison signal; the clock control circuit 213 is used for outputting a clock signal according to the comparison signal; the resistance module 100 is configured to generate a preset reference voltage signal according to an input signal. In the present embodiment, since the second order temperature coefficient of the resistance module 100 is effectively reduced, the temperature coefficient of the clock frequency of the clock signal generated by the oscillation circuit 210 is effectively further reduced.
In some embodiments, the clock control circuit 213 is further configured to output a first control signal and a second control signal with opposite phases according to the comparison signal; the charge/discharge circuit 211 is further configured to control charge/discharge according to the first control signal and the second control signal. Specifically, the charge/discharge circuit 211 includes a capacitor 2111 and a charge/discharge control unit 2112, where the capacitor 2111 is configured to control the capacitor 2111 to be in a first charging state according to a first control signal, so that the capacitor 2111 outputs a first voltage signal; the charging and discharging control unit 2112 is further configured to control the capacitor 2111 in a second charging state according to the second control signal, so that the capacitor 2111 outputs a second voltage signal. The comparing circuit 212 is configured to compare the first voltage signal with a preset reference voltage and output a first comparison signal to the clock control circuit 213; the comparing circuit 212 is further configured to compare the second voltage signal with a preset reference voltage signal and output a second comparison signal to the clock control circuit 213; the clock control circuit 213 is configured to output a clock signal, a first control signal and a second control signal according to the first comparison signal and the second comparison signal.
Alternatively, the oscillating circuit 210 may be a single-comparator oscillating circuit or a dual-comparator oscillating circuit. Taking a dual-comparator oscillating circuit as an example, the structural schematic diagram of the oscillating circuit 210 can be shown in fig. 6, in which the capacitor unit 2111 includes a first capacitor C1 and a second capacitor C2, and the charge and discharge control unit 2112 includes a first switch S1, a second switch S2, a third switch S3 and a fourth switch S4. One end of the first switch S1 is used for receiving an input signal, the other end is connected to the first end of the first capacitor C1 and one end of the second switch S2, and the other end of the second switch S2 is grounded; one end of the third switch S3 is used for receiving an input signal, the other end is connected to the first end of the second capacitor C2 and one end of the fourth switch S4, and the other end of the fourth switch S4 is grounded; the first end of the first capacitor C1 is further connected to the comparison circuit 212, and the second end is grounded; the first end of the second capacitor C2 is also connected to the comparison circuit 212, and the second end is grounded.
The comparison circuit 212 includes a first comparator a1 and a second comparator a2, wherein a first input terminal of the first comparator a1 is connected to the resistance module 100 for receiving the predetermined reference voltage signal, and a second input terminal thereof is connected to a first terminal of the first capacitor C1 for receiving the first voltage signal; a first input terminal of the second comparator a2 is connected to the resistance module 100 for receiving the predetermined reference voltage signal, and a second input terminal thereof is connected to the first terminal of the second capacitor for receiving the second voltage signal. The output terminals of the first comparator a1 and the second comparator a2 are both connected to the clock control circuit 213.
As shown in FIG. 7, the clock control circuit 213 generates a first control signal φ 1, a second control signal φ 2, and a clock signal clk according to the output signals of the first comparator A1 and the second comparator A2.
The first switch S1 and the fourth switch S4 are controlled by a first control signal φ 1, and the second switch S2 and the third switch S3 are controlled by a second control signal φ 2. The first control signal phi 1 and the second control signal phi 2 are opposite in phase, namely when the first control signal phi 1 is at a high level, the second control signal phi 2 is at a low level; when the first control signal φ 1 is low, the second control signal φ 2 is high. Meanwhile, the input current Tref0 provides the reference signal Vref to the first comparator a1 and the second comparator a2 through the resistor block 100.
When the first control signal Φ 1 is at a high level and the second control signal Φ 2 is at a low level, the first switch S1 is turned on, the second switch S2 is turned off, the third switch S3 is turned off, the fourth switch S4 is turned on, the input current Iref1 charges the first capacitor C1, the second capacitor C2 discharges, the first comparator a2 and the second comparator a2 flip and output corresponding comparison signals to the clock control circuit 213, so that the first control signal Φ 1 output by the clock control circuit 213 is changed from a high level to a low level, and the second control signal Φ 2 is changed from a low level to a high level.
When the first control signal Φ 1 is at a low level and the second control signal Φ 2 is at a high level, the first switch S1 is turned off, the second switch is turned on, the third switch is turned on, the fourth switch is turned off, the input current Iref1 charges the second capacitor C2, the first capacitor C1 discharges, the first comparator a2 and the second comparator a2 flip and output corresponding comparison signals to the clock control circuit 213, so that the first control signal Φ 1 output by the clock control circuit 213 is changed from a high-low level to a high level, and the second control signal Φ 2 is changed from a high level to a low level.
The clock control circuit 213 oscillates and generates the clock signal clk by alternately charging and discharging the first capacitor C1 and the second capacitor C2 and repeatedly flipping the first comparator a1 and the second comparator a 2. The clock frequency Freq of the clock signal clk is proportional to R0 × (C1+ C2)/2, where R0 is the resistance of the resistor module 100, C1 is the capacitance of the first capacitor C1, and C2 is the capacitance of the second capacitor C2. The capacitance values of the first capacitor C1 and the second capacitor C2 may be set to the same value of C0, so the clock frequency Freq is proportional to R0 × C0. That is, the temperature coefficient of the clock frequency Freq of the clock signal clk is determined by the resistor block 100 and the capacitor, and the temperature coefficient of the capacitor is generally low, so the temperature coefficient of the clock frequency Freq is mainly determined by the resistor block 100. In the embodiment of the present application, the resistance module 100 modifies the temperature curve of the resistance value of the resistance unit, so that the temperature curve of the resistance value of the resistance unit is stably maintained in a smaller variation range Δ on the whole, thereby effectively reducing the variation of the resistance value of the resistance unit, that is, effectively reducing the second-order temperature coefficient of the resistance unit, and therefore the second-order temperature coefficient of the resistance module 100 is lower, which effectively reduces the second-order temperature coefficient of the clock frequency Freq of the clock signal clk.
The clock circuit provided by the embodiment of the application comprises a resistance unit, a temperature detection unit and a trimming control unit, wherein the resistance unit at least comprises a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module of this application embodiment adjusts the resistance ratio of first resistance and second resistance through the change situation control resistance unit according to the temperature of trimming control unit, and then can further reduce the resistance module along with the change volume of temperature to effectively reduce this clock circuit's second order temperature coefficient.
The integrated circuit provided by the embodiment of the application comprises the clock circuit.
The integrated circuit provided by the embodiment of the application comprises a resistance unit, a temperature detection unit and a trimming control unit, wherein the resistance unit at least comprises a first resistor and a second resistor, and the first resistor and the second resistor have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module of this application embodiment adjusts the resistance ratio of first resistance and second resistance through the change situation control resistance unit according to the temperature of trimming control unit, and then can further reduce the resistance module along with the change volume of temperature to effectively reduce this integrated circuit's second order temperature coefficient.
The embodiment of the application also provides electronic equipment which comprises an equipment main body and the integrated circuit arranged on the equipment main body.
In this embodiment, the electronic device includes, but is not limited to, smart bracelet, smart watch, steering wheel, electronic scale, electrocardio check out test set.
The electronic equipment provided by the embodiment of the application comprises a resistance unit, a temperature detection unit and a trimming control unit, wherein the resistance unit at least comprises a first resistance and a second resistance, and the first resistance and the second resistance have opposite temperature coefficients; the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance and the second resistance according to the trimming signal. The resistance module of this application embodiment adjusts the resistance ratio of first resistance and second resistance through the change situation control resistance unit according to the temperature of trimming control unit, and then can further reduce the resistance module along with the change volume of temperature to effectively reduce this electronic equipment's second order temperature coefficient.
Although the present application has been described with reference to the preferred embodiments, it is to be understood that the present application is not limited to the disclosed embodiments, but rather, the present application is intended to cover various modifications, equivalents and alternatives falling within the spirit and scope of the present application.
Claims (14)
1. A resistance module, comprising:
a resistance unit including at least a first resistance and a second resistance, the first resistance and the second resistance having opposite temperature coefficients;
the temperature detection unit is used for detecting temperature and outputting a temperature detection signal; and
and the trimming control unit is used for sending a trimming signal to the resistance unit according to the temperature detection signal, and the resistance unit is also used for adjusting the resistance ratio of the first resistance to the second resistance according to the trimming signal.
2. The resistance module of claim 1, wherein the resistance unit comprises a trimming circuit and a resistance circuit, the resistance circuit comprising at least the first resistance and the second resistance, the trimming circuit configured to adjust a resistance ratio of the first resistance and the second resistance in the resistance circuit according to the trimming signal.
3. The resistor module of claim 2, wherein the trimming circuit is configured to adjust a resistance of at least one of the first resistor and the second resistor according to the trimming signal.
4. The resistor module according to any one of claims 1 to 3, wherein the trimming control unit is configured to output the trimming signal according to a temperature range in which the temperature detection signal is located and a preset correspondence relationship, wherein the preset correspondence relationship is a correspondence relationship between the temperature range in which the temperature detection signal is located and the resistor ratio.
5. The resistor module according to claim 4, wherein the trimming control unit is configured to send a first trimming signal to the resistor unit when the temperature detection signal is within a first preset temperature range, send a second trimming signal to the resistor unit when the temperature detection signal is within a second preset temperature range, and send a third trimming signal to the resistor unit when the temperature detection signal is within a third preset temperature range; the resistance unit is used for adjusting the resistance ratio to a first ratio according to the first trimming signal, adjusting the resistance ratio to a second ratio according to the second trimming signal, and adjusting the resistance ratio to a third ratio according to the third trimming signal.
6. A clock circuit, comprising:
an oscillation circuit; and
a resistance module as claimed in any one of claims 1 to 5, connected to the oscillator circuit.
7. The clock circuit of claim 6, wherein the oscillation circuit comprises:
the charging and discharging circuit is used for charging and discharging by utilizing an input signal and outputting a voltage signal;
the comparison circuit is used for comparing the voltage signal with the preset reference voltage signal and outputting a comparison signal; and
the clock control circuit is used for outputting a clock signal according to the comparison signal; the resistance module is used for generating the preset reference voltage signal according to the input signal.
8. The clock circuit of claim 7, wherein the clock control circuit is further configured to output a first control signal and a second control signal that are opposite in phase based on the comparison signal; the charge and discharge circuit is also used for controlling charge and discharge according to the first control signal and the second control signal.
9. The clock circuit of claim 8, wherein the charge and discharge circuit comprises:
a capacitor unit; and
the charge and discharge control unit is used for controlling the capacitor unit to be in a first charging state according to the first control signal so as to enable the capacitor unit to output a first voltage signal; the charge and discharge control unit is further used for controlling the capacitor unit to be in a second charging state according to the second control signal, so that the capacitor unit outputs a second voltage signal.
10. The clock circuit according to claim 9, wherein the capacitor unit comprises a first capacitor and a second capacitor, the charge and discharge control unit comprises a first switch, a second switch, a third switch and a fourth switch, wherein the first switch and the fourth switch are controlled by the first control signal, and the second switch and the third switch are controlled by the second control signal;
one end of the first switch is used for receiving the input signal, the other end of the first switch is connected to the first end of the first capacitor and one end of the second switch, and the other end of the second switch is grounded;
one end of the third switch is used for receiving the input signal, the other end of the third switch is connected to the first end of the second capacitor and one end of the fourth switch, and the other end of the fourth switch is grounded;
the first end of the first capacitor is also connected to the comparison circuit, and the second end of the first capacitor is grounded;
the first end of the second capacitor is also connected to the comparison circuit, and the second end is grounded.
11. The clock circuit of claim 9, wherein the comparison circuit is configured to compare the first voltage signal with the predetermined reference voltage and output a first comparison signal to the clock control circuit; the comparison circuit is further used for comparing the second voltage signal with the preset reference voltage signal and outputting a second comparison signal to the clock control circuit;
the clock control circuit is used for outputting the clock signal, the first control signal and the second control signal according to the first comparison signal and the second comparison signal.
12. The clock circuit of claim 11, wherein the comparison circuit comprises:
a first comparator, a first input end of which is connected to the resistance module to receive the preset reference voltage signal, and a second input end of which is connected to the first end of the first capacitor to receive the first voltage signal; and
and a first input end of the second comparator is connected to the resistance module to receive the preset reference voltage signal, and a second input end of the second comparator is connected to the first end of the second capacitor to receive the second voltage signal.
13. An integrated circuit comprising a clock circuit as claimed in any one of claims 6 to 12.
14. An electronic device comprising a device body and the integrated circuit of claim 13 disposed within the device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111616382.7A CN114389580A (en) | 2021-12-27 | 2021-12-27 | Resistor module, clock circuit, integrated circuit, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111616382.7A CN114389580A (en) | 2021-12-27 | 2021-12-27 | Resistor module, clock circuit, integrated circuit, and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114389580A true CN114389580A (en) | 2022-04-22 |
Family
ID=81197208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111616382.7A Pending CN114389580A (en) | 2021-12-27 | 2021-12-27 | Resistor module, clock circuit, integrated circuit, and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114389580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118041246A (en) * | 2024-04-12 | 2024-05-14 | 成都电科星拓科技有限公司 | Low-voltage adjustable high-precision oscillator |
-
2021
- 2021-12-27 CN CN202111616382.7A patent/CN114389580A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118041246A (en) * | 2024-04-12 | 2024-05-14 | 成都电科星拓科技有限公司 | Low-voltage adjustable high-precision oscillator |
| CN118041246B (en) * | 2024-04-12 | 2024-06-14 | 成都电科星拓科技有限公司 | Low-voltage adjustable high-precision oscillator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10432176B2 (en) | Relaxation oscillators with reduced errors or no errors in output frequencies caused by changes in temperatures and/or fabrication processes | |
| KR100235399B1 (en) | A crystal oscillation apparatus, its adjustment method | |
| CN107040243B (en) | Low-frequency precision oscillator | |
| EP0881765A1 (en) | Precision oscillator circuit having a controllable duty cycle and related method | |
| US8659362B2 (en) | Relaxation oscillator circuit with reduced sensitivity of oscillation frequency to comparator delay variation | |
| US20110140754A1 (en) | Reference frequency generation circuit, semiconductor integrated circuit, and electronic device | |
| US7262640B2 (en) | Voltage-frequency conversion apparatus | |
| US7279941B2 (en) | Voltage-frequency conversion apparatus and method of changing reference voltage thereof | |
| CN107453711B (en) | Oscillator, electronic apparatus, moving object, and method for manufacturing oscillator | |
| EP3852268A1 (en) | Oscillation circuit, chip, and electronic device | |
| EP3748319B1 (en) | Aging calibration for temperature sensor | |
| CN114389580A (en) | Resistor module, clock circuit, integrated circuit, and electronic device | |
| US7443255B2 (en) | Oscillator circuit and method for adjusting oscillation frequency of same | |
| JPH0475121A (en) | Input interface circuit for automobile | |
| JP4940684B2 (en) | Phase adjustment circuit and phase adjustment method | |
| CN107645288B (en) | Electronic circuit, method and electronic device for generating pulses | |
| US7199676B2 (en) | Frequency adjustment circuit | |
| JP2002055130A (en) | Frequency judgment circuit and data processor | |
| CN115622504A (en) | Circuit arrangement and oscillator | |
| CN114978163A (en) | Frequency discrimination circuit, clock correction circuit, chip and information processing device | |
| US6005447A (en) | Method and device for adjusting the frequency of oscillator built in an integrated circuit | |
| US7348807B2 (en) | Electric circuit for providing a selection signal | |
| EP3282583B1 (en) | Oscillator circuit | |
| CN217183278U (en) | Frequency discrimination circuit, clock correction circuit, chip and information processing device | |
| US10784870B2 (en) | Electronic circuit, semiconductor integrated circuit and monitoring circuit mounted with the same, and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |