CN116192052B - Oscillator output compensation method, frequency adjustment circuit and oscillator - Google Patents
Oscillator output compensation method, frequency adjustment circuit and oscillator Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/02—Details
- H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The application relates to an oscillator output compensation method, a frequency adjustment circuit and an oscillator. The method comprises the following steps: determining an initial temperature characteristic of the oscillator; selecting a corresponding target passive component based on the initial temperature characteristic, wherein the temperature characteristic of the target passive component is complementary with the initial temperature characteristic; and adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement. By adopting the method, the output accuracy of the oscillator can be improved.
Description
Technical Field
The present application relates to the field of oscillator technologies, and in particular, to an oscillator output compensation method, a frequency adjustment circuit, and an oscillator.
Background
The frequency circuit is quite common in the design of an integrated circuit chip, mainly provides the functions of synchronization and counting, comprises an internal frequency circuit and an external frequency circuit, has two requirement indexes of speed and accuracy, and can obtain better frequency characteristics when being applied to the external frequency circuit, and has higher cost and more additional external component requirements than the external frequency circuit; the built-in frequency circuit has poor application characteristics in accuracy, but the integrated circuit chip is very popular in application because of high integration and no need of too many external components, and the improvement of accuracy is an important item because of wide application, and the built-in accuracy offset factor of the integrated circuit mainly comes from process drift and component characteristics of active and target passive components (MOS/BJT/Diode/Resistor/Capacitor) of the integrated circuit.
In the conventional technology, the accuracy error of the frequency circuit of the built-in integrated circuit is affected by three main parameters of process variation, temperature and voltage drift, the influence of the process variation can be compensated by TRIMMING TECH scheme, the influence of the voltage and the temperature drift can be more quickly reflected to realize the real-time compensation scheme, and the voltage drift is provided with a voltage source which does not change along with the voltage and the temperature drift by the optimal design of the voltage source to supply the frequency circuit.
The two compensation schemes only have compensation effects on initial manufacturing processes and design variations, and physical and electrical characteristics of the components along with temperature changes generated by material characteristics cannot be compensated in time, so that the active components and the dynamic components of the built frequency circuit are influenced by temperature and drift, and the accuracy of frequency output is influenced.
Disclosure of Invention
In view of the above, it is desirable to provide an oscillator output compensation method, a frequency adjustment circuit, and an oscillator that can improve the output accuracy of the oscillator.
In a first aspect, the present application provides a method of oscillator output compensation, the method comprising:
determining an initial temperature characteristic of the oscillator;
Selecting a corresponding target passive component based on the initial temperature characteristic, wherein the temperature characteristic of the target passive component is complementary with the initial temperature characteristic;
And adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
In one embodiment, the determining the initial temperature characteristic of the oscillator includes:
the initial temperature characteristic of the oscillator is determined by means of simulation and/or by means of actual measurement.
In one embodiment, the simulating means includes:
Acquiring parameters of each component in the oscillator;
and designing simulation based on parameters of each component to obtain initial temperature characteristics of the oscillator.
In one embodiment, the manner of actual measurement includes:
changing the temperature of the oscillator after the oscillator is started;
and recording the relation between the output of the oscillator and the temperature to obtain the initial temperature characteristic of the oscillator.
In one embodiment, the selecting a corresponding target passive component based on the initial temperature characteristic includes:
Selecting a target passive component that is inversely related to the temperature when the initial temperature characteristic is positively related to the temperature;
When the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to the temperature.
In one embodiment, the selecting a corresponding target passive component based on the initial temperature characteristic includes:
Determining the accuracy of the output of the oscillator;
And selecting target passive components corresponding to the temperature characteristics based on the initial temperature characteristics, and determining the number of the target passive components based on the initial temperature characteristics and the accuracy.
In a second aspect, the present application also provides a frequency adjustment circuit of an oscillator, the frequency adjustment circuit of the oscillator comprising:
An input module for providing an input signal;
A passive component module, the input of which is connected with the output of the input module, the target passive component module comprising an initial passive component and a target passive component determined based on any one of claims 1 to 6, the passive component module being configured to generate a complementary initial control signal under the input signal;
and the input of the merging module is connected with the output of the target passive component module and is used for obtaining a target control signal based on the complementary initial control signal.
In one embodiment, the temperature characteristic of the target passive component is complementary to the initial temperature characteristic of the output of the oscillator.
In one embodiment, the number of target passive components is related to the initial temperature characteristic of the output of the oscillator and the accuracy.
In a third aspect, the present application also provides an oscillator comprising:
The frequency adjusting circuit of the oscillator is used for generating a target control signal;
and the input of the oscillation module is connected with the output of the frequency adjusting circuit and is used for generating the output of the oscillator based on the target control signal.
According to the oscillator output compensation method, the frequency adjustment circuit and the oscillator, the frequency adjustment circuit of the oscillator is adjusted through the target passive component which is complementary with the initial temperature characteristic of the oscillator, so that the target temperature characteristic of the oscillator meets the temperature characteristic requirement, and the oscillator is more accurate.
Drawings
FIG. 1 is a circuit diagram of an oscillator in one embodiment;
FIG. 2 is a circuit diagram of an oscillating unit in one embodiment;
FIG. 3 is a waveform diagram of the output of an oscillator in one embodiment;
FIG. 4 is a schematic diagram of an initial temperature characteristic of an oscillator in one embodiment;
FIG. 5 is a circuit diagram of a frequency adjustment circuit in one embodiment;
FIG. 6 is a waveform diagram of a target control signal in one embodiment;
FIG. 7 is a flow chart of a method of oscillator output compensation in one embodiment;
fig. 8 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Specifically, referring to fig. 1, fig. 1 is a circuit diagram of an oscillator in an embodiment, where the oscillator includes a frequency adjustment circuit and an oscillation module, and an output of the frequency adjustment circuit is connected to an input of the oscillation module, and an output of the oscillation module is an output of the entire oscillator, and the frequency adjustment circuit is used to generate a target control signal, and the oscillation module is used to generate an output of the oscillator based on the target control signal. Optionally, the oscillator is a ring oscillator, and the frequency adjustment circuit in this embodiment may be a frequency adjustment circuit after adjustment, that is, a frequency adjustment circuit whose target temperature characteristic meets the temperature characteristic requirement.
Specifically, the oscillator generates periodic variation by transmitting delay through the oscillation module, and adjusts the oscillation output frequency through a target control signal output by the frequency adjusting circuit. The target control signal is a circuit/voltage with adjustable frequency generated by a frequency adjusting circuit, wherein the frequency adjusting circuit can comprise a digital control circuit and a power circuit, and the power circuit is used for providing a relatively stable voltage current source for the digital control circuit and the oscillating module. In this embodiment, the oscillation module includes a plurality of oscillation units, the oscillation units include an active component, as shown in fig. 2, the active component includes a PMos pipe and an Nmos pipe, and the active component is easily affected by temperature changes to affect the characteristics, so that the accuracy of the output frequency is reduced due to the temperature changes. Specifically, referring to fig. 3, the corresponding control voltage/current CtrlA when F A_40 is 40 ℃ is selected by the related analog design, the corresponding design output F OSC frequency is the design specification target, because the process variation during the integrated circuit production causes the output frequency to deviate, the process variation can be compensated by the coarse adjustment and fine adjustment mechanism of the digital control built-in voltage/current, so that the frequency of the built-in F A_40 meets the design specification target at the frequency of the F OSC output by the actual chip.
However, under the normal operation, the building elements of the circuit itself are still affected by temperature drift to the output of the ring oscillator, and in combination with the illustration of fig. 4, the frequency of the output of the ring oscillator will be negative temperature coefficient effect along with the temperature change (-40 ℃ -100 ℃) due to the temperature influence when F A_40 is applied.
For this purpose, the frequency adjustment circuit is adjusted by solving the drift of the output caused by the temperature change, specifically, in connection with fig. 5, the frequency adjustment circuit includes an input module, a passive component module, and a combining module, where an input end of the passive component module is connected with an output of the input module, and an output end of the passive component module is connected with an input end of the combining module, where the input module is used to provide an input signal, the passive component module is used to generate a complementary initial control signal under the input signal, and the combining module is used to obtain a target control signal based on the complementary initial control signal, where the passive component module includes an initial passive component and a target passive component, that is, the passive component module includes at least two passive components, and temperature characteristics of the initial passive component and the target passive component are complementary. Wherein the passive component is a resistor.
Optionally, with continued reference to fig. 5, the input module includes a reference current source module and a mirror current source module, where the reference current source module may be the power module in fig. 1, for providing a relatively stable voltage current source, and the mirror current source module is for providing a mirror current. The mirror current is respectively input into an initial passive component and a target passive component in the passive resistance module, so that initial control signals with different temperature characteristics can be generated, then the initial control signals with different temperature characteristics are combined to form a target control signal with complementary characteristics, the initial control signal comprises I2/V2 and I3/V3, which are complementary, and complementary control voltages/currents are combined to obtain the target control signal, and the offset of the output frequency caused by the temperature effect can be compensated through the target control signal, so that the effect of temperature compensation is achieved.
Because different passive components and attributes have different temperature coefficients, the complementary mechanism can match target control signals required by design selection through component characteristics, namely complementary control voltage/current Ctrla, for example, resistors of different types can have different temperature coefficients, positive and negative temperature coefficients of the passive components are utilized to match with Trimming control voltage to generate complementary control voltage so that oscillator output can synchronously and complementarily adjust the control voltage/current along with temperature drift, and an output frequency with smaller relative temperature drift can be obtained.
In addition, as shown in fig. 5, the splitting of the complementary control voltage/current of the oscillator frequency adjusting circuit is not limited to two sets of sets which can be used in combination according to the application characteristics of the actual circuit, that is, the number of target passive components is related to the initial temperature characteristics and the accuracy of the output of the oscillator. When more accurate and complex temperature coefficient control signals are needed, more target passive components can be used, the number of the target passive components can be determined according to the fineness requirement of controllable adjustment of the target control signals, for example, when the accuracy is 0.1, the number of the required target passive components is 1, and the size is x; however, when the accuracy is 0.01, the required target passive elements are adjusted to be 10 in number (for example, x is 1/10).
In one embodiment, as shown in fig. 7, there is provided an oscillator output compensation method including the steps of:
s702: an initial temperature characteristic of the oscillator is determined.
Specifically, the initial temperature characteristic is a temperature characteristic of the output of the oscillator, for example, as shown in fig. 4, and the frequency of the output of the oscillator decreases with the increase of temperature, and then the initial temperature characteristic of the oscillator is inversely related to the temperature, which may also be referred to as having a negative temperature coefficient. In other embodiments, the temperature characteristic of the oscillator may be positively temperature dependent, and may also be referred to as having a positive temperature coefficient.
In one of the alternative embodiments, determining the initial temperature characteristic of the oscillator includes: the initial temperature characteristic of the oscillator is determined by means of simulation and/or by means of actual measurement. For example, when the parameters of the various components in the oscillator are known, the initial temperature characteristics of the oscillator may be determined by means of computer simulation. When the parameters of the individual components in the oscillator are unknown, the initial temperature characteristics of the oscillator can be determined by means of actual measurements. In one alternative embodiment, when the parameters of each component in the oscillator are known, the initial temperature characteristic of the oscillator may be determined by a computer simulation mode and an actual measurement mode at the same time, and the initial temperature characteristics obtained by the two measurement modes are combined to obtain more accurate initial temperature characteristics, for example, an average value, etc., and the specific combination mode is not limited herein.
S704: the corresponding target passive component is selected based on the initial temperature characteristic, the temperature characteristic of the target passive component being complementary to the initial temperature characteristic.
S706: and adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
Specifically, the target passive component is a component that needs to be added to the frequency adjustment circuit of the oscillator, and may be connected in parallel with the initial passive component in the frequency adjustment circuit, and the temperature characteristic of the target passive component is complementary to the initial temperature characteristic, that is, the target control signal with complementary characteristic is output by the frequency adjustment circuit by selecting the positive temperature coefficient resistor or the negative temperature coefficient resistor to match the complementary characteristic through the resistance specification parameter data provided by the process. Optionally, selecting a corresponding target passive component based on the initial temperature characteristic includes: selecting a target passive component inversely related to temperature when the initial temperature characteristic is positively related to temperature; when the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to temperature.
In practical applications, the temperature coefficient of the initial passive component is a, and then the temperature coefficient of the target passive component is b, and then alternatively a+b=0, or a+b is less than or equal to a threshold, such as an allowable drift range.
In practical applications, the temperature characteristic of the oscillator may be gradually adjusted, for example, a target passive component with complementary temperature characteristics is selected based on the initial temperature characteristic, then the frequency adjustment circuit is adjusted, the initial temperature characteristic of the oscillator is subsequently determined, if the initial temperature characteristic of the oscillator is not satisfied, the target passive component is continuously selected based on the determined initial temperature characteristic of the oscillator until the adjusted target temperature characteristic of the oscillator satisfies the temperature characteristic requirement.
In other embodiments, the accuracy of the temperature characteristic of the target passive component added each time in the frequency adjustment circuit may be determined based on the accuracy, such that the target temperature characteristic of the oscillator after adjustment is adjusted multiple times based on the adjustment accuracy until the temperature characteristic requirement is satisfied. For example, the temperature coefficient of the initial passive component is a, the temperature coefficient of the target passive component is ci (where 0< i < n, and i is a positive integer), and a+c1+c2+c3+c4+c5+c6+c7+c8+c9+c10=0 exists to implement complementation, so that when in adjustment, the target passive component with the temperature coefficient of ci is sequentially added to the frequency adjustment circuit, and the target temperature characteristic of the adjusted oscillator is obtained until the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
According to the oscillator output compensation method, the frequency adjustment circuit of the oscillator is adjusted through the target passive component which is complementary with the initial temperature characteristic of the oscillator, so that the target temperature characteristic of the oscillator meets the temperature characteristic requirement, and the oscillator is more accurate.
In one embodiment, the obtaining of the initial temperature characteristic in an analog manner includes: acquiring parameters of each component in the oscillator; the initial temperature characteristic of the oscillator is obtained based on the parameter design simulation of each component.
Specifically, in the present embodiment, the oscillator may be simulated by a simulation tool, so that the initial temperature characteristic is obtained by a simulation.
For example, in EDA TOOLs, an oscillator circuit is configured, parameters of each component in the circuit are configured, so that the oscillator is started in EDA TOOLs, the output of the oscillator is obtained, after the temperature is adjusted, a plurality of outputs of the oscillator are obtained, and then a relation curve of the output of the oscillator and the temperature is drawn, so that initial temperature characteristics of the oscillator are obtained.
In one embodiment, the actual measured manner of acquiring the initial temperature characteristic includes: after the oscillator is started, changing the temperature of the oscillator; the relationship between the output of the oscillator and the temperature is recorded to obtain the initial temperature characteristic of the oscillator.
Specifically, in this embodiment, the chip is powered up to cause the oscillator output to start vibrating and change the temperature of the chip, for example, to increase or decrease the temperature, and simultaneously record the relationship between the output of the corresponding oscillator and the temperature, for example, drawing a graph of the relationship between the output and the temperature according to the recorded output and temperature of the oscillator, thereby obtaining the initial temperature characteristic of the oscillator.
In one embodiment, selecting a corresponding target passive component based on the initial temperature characteristic includes: determining the accuracy of the output of the oscillator; the target passive component corresponding to the temperature characteristic is selected based on the initial temperature characteristic, and the number of target passive components is determined based on the initial temperature characteristic and the accuracy.
Specifically, the accuracy refers to the accuracy of the output of the oscillator with respect to the change in temperature, and may be, for example, 1, 0.1, 0.01, or the like, and is not particularly limited herein. The higher the accuracy, the more the number of target passive components, the lower the accuracy, and the fewer the number of target passive components.
For example, when the accuracy is low, then a target passive component may be selected to adjust the target temperature characteristic of the oscillator; when the accuracy is high, then multiple target passive components are selected to adjust the target temperature characteristics of the oscillator. For example, when the accuracy is low, 1 target passive component is selected, the temperature coefficient of the initial passive component of the flow is a, and the temperature coefficient of the target passive component is b; when the accuracy is high, 10 target passive components are selected to realize complementation, for example, the temperature coefficient of the initial passive component is a, the temperature coefficient of the target passive component is ci (wherein 0< i < n, and i is a positive integer), and a+c1+c2+c3+c4+c5+c6+c7+c8+c9+c10=0 exists to realize complementation.
In one embodiment, in order to ensure accuracy, the target passive components may be sequentially added, and the output of the oscillator may be measured until the adjusted target temperature characteristic of the oscillator meets the temperature characteristic requirement, for example, the target passive component with a larger change to the output may be added first to implement coarse adjustment, and the target passive component with a smaller change to the output may be added later to implement fine adjustment.
It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides an oscillator output compensation device for realizing the above-mentioned related oscillator output compensation method. The implementation of the solution provided by the device is similar to that described in the above method, so the specific limitation in the embodiments of the oscillator output compensation device or devices provided below may be referred to the limitation of the oscillator output compensation method hereinabove, and will not be repeated here.
In one embodiment, there is provided an oscillator output compensation apparatus including: an initial temperature characteristic determining module, a selecting module and a circuit adjusting module, wherein:
An initial temperature characteristic determining module for determining an initial temperature characteristic of the oscillator;
The selection module is used for selecting a corresponding target passive component based on the initial temperature characteristic, and the temperature characteristic of the target passive component is complementary with the initial temperature characteristic;
The circuit adjusting module is used for adjusting the frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, and the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
In one embodiment, the initial temperature characteristic determining module is further configured to determine the initial temperature characteristic of the oscillator by means of simulation and/or actual measurement.
In one embodiment, the initial temperature characteristic determining module is further configured to obtain parameters of components in the oscillator; the initial temperature characteristic of the oscillator is obtained based on the parameter design simulation of each component.
In one embodiment, the initial temperature characteristic determining module is further configured to change the temperature of the oscillator after the oscillator is started; the relationship between the output of the oscillator and the temperature is recorded to obtain the initial temperature characteristic of the oscillator.
In one embodiment, the selecting module is further configured to select the target passive component that is negatively correlated to the temperature when the initial temperature characteristic is positively correlated to the temperature; when the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to temperature.
In one embodiment, the selecting module is further configured to determine an accuracy of an output of the oscillator; the target passive component corresponding to the temperature characteristic is selected based on the initial temperature characteristic, and the number of target passive components is determined based on the initial temperature characteristic and the accuracy.
The respective modules in the above-described oscillator output compensation apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a terminal, and the internal structure thereof may be as shown in fig. 8. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input means. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a method of oscillator output compensation. The display unit of the computer device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in FIG. 8 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, there is also provided a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program: determining an initial temperature characteristic of the oscillator; selecting a corresponding target passive component based on the initial temperature characteristic, wherein the temperature characteristic of the target passive component is complementary with the initial temperature characteristic; and adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
In one embodiment, determining an initial temperature characteristic of an oscillator implemented when a processor executes a computer program comprises: the initial temperature characteristic of the oscillator is determined by means of simulation and/or by means of actual measurement.
In one embodiment, the manner in which a simulation is implemented when a processor executes a computer program includes: acquiring parameters of each component in the oscillator; the initial temperature characteristic of the oscillator is obtained based on the parameter design simulation of each component.
In one embodiment, the manner in which the actual measurements made by the processor when executing the computer program include: after the oscillator is started, changing the temperature of the oscillator; the relationship between the output of the oscillator and the temperature is recorded to obtain the initial temperature characteristic of the oscillator.
In one embodiment, selecting a corresponding target passive component based on an initial temperature characteristic implemented when the processor executes the computer program comprises: selecting a target passive component inversely related to temperature when the initial temperature characteristic is positively related to temperature; when the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to temperature.
In one embodiment, selecting a corresponding target passive component based on an initial temperature characteristic implemented when the processor executes the computer program comprises: determining the accuracy of the output of the oscillator; the target passive component corresponding to the temperature characteristic is selected based on the initial temperature characteristic, and the number of target passive components is determined based on the initial temperature characteristic and the accuracy.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: determining an initial temperature characteristic of the oscillator; selecting a corresponding target passive component based on the initial temperature characteristic, wherein the temperature characteristic of the target passive component is complementary with the initial temperature characteristic; and adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
In one embodiment, determining an initial temperature characteristic of an oscillator, which is implemented when a computer program is executed by a processor, comprises: the initial temperature characteristic of the oscillator is determined by means of simulation and/or by means of actual measurement.
In one embodiment, the manner in which the simulation is implemented when the computer program is executed by the processor includes: acquiring parameters of each component in the oscillator; the initial temperature characteristic of the oscillator is obtained based on the parameter design simulation of each component.
In one embodiment, the manner in which the computer program is actually measured when executed by the processor comprises: after the oscillator is started, changing the temperature of the oscillator; the relationship between the output of the oscillator and the temperature is recorded to obtain the initial temperature characteristic of the oscillator.
In one embodiment, a computer program, when executed by a processor, implements selecting a corresponding target passive component based on an initial temperature characteristic, comprising: selecting a target passive component inversely related to temperature when the initial temperature characteristic is positively related to temperature; when the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to temperature.
In one embodiment, a computer program, when executed by a processor, implements selecting a corresponding target passive component based on an initial temperature characteristic, comprising: determining the accuracy of the output of the oscillator; the target passive component corresponding to the temperature characteristic is selected based on the initial temperature characteristic, and the number of target passive components is determined based on the initial temperature characteristic and the accuracy.
In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of: determining an initial temperature characteristic of the oscillator; selecting a corresponding target passive component based on the initial temperature characteristic, wherein the temperature characteristic of the target passive component is complementary with the initial temperature characteristic; and adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement.
In one embodiment, determining an initial temperature characteristic of an oscillator, which is implemented when a computer program is executed by a processor, comprises: the initial temperature characteristic of the oscillator is determined by means of simulation and/or by means of actual measurement.
In one embodiment, the manner in which the simulation is implemented when the computer program is executed by the processor includes: acquiring parameters of each component in the oscillator; the initial temperature characteristic of the oscillator is obtained based on the parameter design simulation of each component.
In one embodiment, the manner in which the computer program is actually measured when executed by the processor comprises: after the oscillator is started, changing the temperature of the oscillator; the relationship between the output of the oscillator and the temperature is recorded to obtain the initial temperature characteristic of the oscillator.
In one embodiment, a computer program, when executed by a processor, implements selecting a corresponding target passive component based on an initial temperature characteristic, comprising: selecting a target passive component inversely related to temperature when the initial temperature characteristic is positively related to temperature; when the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to temperature.
In one embodiment, a computer program, when executed by a processor, implements selecting a corresponding target passive component based on an initial temperature characteristic, comprising: determining the accuracy of the output of the oscillator; the target passive component corresponding to the temperature characteristic is selected based on the initial temperature characteristic, and the number of target passive components is determined based on the initial temperature characteristic and the accuracy.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A method of oscillator output compensation, the method comprising:
determining an initial temperature characteristic of the oscillator;
Selecting a corresponding target passive component based on the initial temperature characteristic, wherein the temperature characteristic of the target passive component is complementary with the initial temperature characteristic;
Adjusting a frequency adjusting circuit of the oscillator based on the target passive component to obtain an adjusted oscillator, wherein the target temperature characteristic of the adjusted oscillator meets the temperature characteristic requirement;
selecting a corresponding target passive component based on the initial temperature characteristic, comprising:
Determining the accuracy of the output of the oscillator;
And selecting target passive components corresponding to the temperature characteristic based on the initial temperature characteristic, and determining the number of the target passive components based on the initial temperature characteristic and the precision, wherein the precision refers to the precision of the output of the oscillator on the change of temperature, when the target passive components are determined, a first target passive component is added for coarse adjustment, a second target passive component is added for fine adjustment, and the change of the output of the first target passive component is larger than that of the second target passive component.
2. The method of claim 1, wherein said determining an initial temperature characteristic of the oscillator comprises:
the initial temperature characteristic of the oscillator is determined by means of simulation and/or by means of actual measurement.
3. The method of claim 2, wherein the simulating means comprises:
Acquiring parameters of each component in the oscillator;
and designing simulation based on parameters of each component to obtain initial temperature characteristics of the oscillator.
4. The method according to claim 2, wherein the manner of actual measurement comprises:
changing the temperature of the oscillator after the oscillator is started;
and recording the relation between the output of the oscillator and the temperature to obtain the initial temperature characteristic of the oscillator.
5. The method of any one of claims 1 to 4, wherein the selecting a corresponding target passive component based on the initial temperature characteristic comprises:
Selecting a target passive component that is inversely related to the temperature when the initial temperature characteristic is positively related to the temperature;
When the initial temperature characteristic is inversely related to temperature, a target passive component is selected that is positively related to the temperature.
6. A frequency adjustment circuit of an oscillator, characterized in that the frequency adjustment circuit of an oscillator employs the oscillator output compensation method according to any one of claims 1 to 5, the frequency adjustment circuit of an oscillator comprising:
An input module for providing an input signal;
a passive component module, the input of which is connected with the output of the input module, the passive component module comprising an initial passive component and a target passive component determined based on any one of claims 1 to 5, the passive component module being configured to generate a complementary initial control signal under the input signal;
And the input of the merging module is connected with the output of the passive component module and is used for obtaining a target control signal based on the complementary initial control signal.
7. The oscillator frequency adjustment circuit of claim 6, wherein the temperature characteristic of the target passive component is complementary to an initial temperature characteristic of the output of the oscillator.
8. The oscillator frequency adjustment circuit of claim 7, wherein the temperature characteristic of the target passive component is inversely related to temperature when the initial temperature characteristic of the output of the oscillator is positively related to temperature;
when the initial temperature characteristic of the output of the oscillator is inversely related to temperature, the temperature characteristic of the target passive component is positively related to temperature.
9. The oscillator frequency adjustment circuit of claim 6, wherein the target passive component is a resistor.
10. An oscillator, the oscillator comprising:
the frequency adjustment circuit of an oscillator of any one of claims 6 to 9 for generating a target control signal;
and the input of the oscillation module is connected with the output of the frequency adjusting circuit and is used for generating the output of the oscillator based on the target control signal.
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| US7161440B2 (en) * | 2003-12-11 | 2007-01-09 | Seiko Epson Corporation | Temperature compensation circuit |
| US8067992B2 (en) * | 2008-06-06 | 2011-11-29 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Temperature compensation circuit and method |
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