CN209435468U - A kind of frequency tracking circuit - Google Patents
A kind of frequency tracking circuit Download PDFInfo
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- CN209435468U CN209435468U CN201822143903.1U CN201822143903U CN209435468U CN 209435468 U CN209435468 U CN 209435468U CN 201822143903 U CN201822143903 U CN 201822143903U CN 209435468 U CN209435468 U CN 209435468U
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Abstract
The utility model discloses a kind of frequency tracking circuits, belong to synchronous double-frequency induction heating power field, first filter, phase discriminator, second filter, gain module, sine wave module/triangular wave module, driving circuit including sequential connection, and the delay switch connecting with gain module, the sine wave module/triangular wave module are connect with phase discriminator；The working frequency of load circuit is controlled by the frequency of sine wave and triangular wave, change the frequency of sine wave and triangular wave in real time, load circuit is set to rework in its intrinsic frequency, to calculate the frequency that determining value comes setting signal source, in the actual motion for solving synchronous double-frequency induction heating power, the intrinsic frequency of load circuit changes at any time, when larger with theoretical calculation difference, lead to not the problem of calculating the frequency that determining value comes setting signal source, even resulting in induction power supply cisco unity malfunction.
Description
Technical field
The utility model belongs to synchronous double-frequency induction heating power field, is related to a kind of frequency tracking circuit.
Background technique
Induction heating technique is applied in industrial production from earlier 1900s, and the various industries in China obtain up to now
It being widely applied, induction heating power is wherein playing critically important role, so, the development of induction heating power is directly determined
The application process of induction heating technique is determined.
The frequency of induction heating power is generally divided into four frequency ranges: low frequency 500Hz surpasses hereinafter, intermediate frequency 1KHz to 10KHz
Audio 20KHz to 75KHz and high frequency 100KHz or more, currently, there are two types of the induction heating apparatuses of electric semiconductor formula, one is
The comparison of the induction heating power of single-frequency, domestic application is more, and also relative maturity, another kind are the induction heatings of double frequency to technology
Power supply exactly combines two kinds of frequencies, makes the electric current induction heating for loading while bearing two kinds of frequencies.By induction heating
For principle it is found that square root of the depth of penetration δ only with power frequency f is inversely proportional, frequency is higher, and the heating thickness of workpiece is thinner.
And in surface hardening, as this complex-shaped workpiece of gear, traditional single-frequency or it is different when double frequency induction
Heat treatment method is difficult so that surface hardening homogeneous heating, so that preferable profiling quench-hardened case cannot be obtained.
In the actual motion of synchronous double-frequency induction heating power, when induction coil has electric current to pass through, and gear is heated,
The coupling inductance of gear and induction coil is not a fixed value, and it is also with time-varying that this, which results in the intrinsic frequency of load circuit,
Change；In addition, the difference of each element placement position also results in the difference such as lead-in inductance, in this way, if actual loading is electric
It, just can not be according to the value that theoretical calculation determines come setting signal source when the intrinsic frequency and theoretical calculation difference on road are larger
Frequency, if deviateing load resonant point farther out, induction power supply just cisco unity malfunction.
Therefore, the utility model devises a kind of frequency tracking circuit.
Summary of the invention
The purpose of this utility model is that: a kind of frequency tracking circuit is provided, solves synchronous double-frequency induction heating electricity
In the actual motion in source, the intrinsic frequency of load circuit changes at any time, when larger with theoretical calculation difference, leads to not calculate true
The problem of fixed value carrys out the frequency in setting signal source, even results in induction power supply cisco unity malfunction.
The technical solution adopted in the utility model is as follows:
A kind of frequency tracking circuit, first filter, phase discriminator, second filter, gain module including sequential connection,
Sine wave module/triangular wave module, driving circuit, and the delay switch being connect with gain module, sine wave module/tri-
Angular mode block is connect with phase discriminator；
Sample rate current is separated into electric current of intermediate frequency component and high-frequency current component by the first filter, and reshaping is at square wave
Phase discriminator is output to as current phase signal；
The phase difference of the phase discriminator discriminating voltage phase signal and current phase signal, output phase difference signal to second
Filter；
Phase signal is become phase difference level signal and is output to gain module by the second filter；
The delay switch carries out one to sine wave/triangular wave initial frequency value that feedback signal adjustment signal source inputs
Gain module is output to after fixed delay；
The gain module judges phase difference level signal, according to phase difference level signal increase/reduce the sine wave/
The frequency of triangular wave, then it is output to delay switch, sine wave/tri- are output to after sine wave/triangular wave reaches intrinsic frequency
Sine wave/triangular wave frequency is reduced certain numerical value, if phase difference is electric if phase difference level signal is positive by angular mode block
It is flat to be negative, then sine wave/triangular wave frequency is increased into certain numerical value, be output to after reaching intrinsic frequency sine wave/
Triangular wave module；
The sine wave/triangular wave module is converted into sine wave/triangular wave wave according to sine wave/triangular wave frequency of input
Shape is output to driving circuit, and exports electricity for sine wave/triangular wave phase as inverter output voltage intermediate frequency component/inversion
The phase for pressing high fdrequency component, is shaped to voltage phase signal and is output to phase discriminator；
The driving circuit works to load according to sine wave/triangular wave waveform driving switch device.
Further, the first filter includes the first low-pass filter and the first high-pass filter, and described first is low
Bandpass filter isolates electric current of intermediate frequency component from sample rate current, and first high-pass filter isolates height from sample rate current
Frequency current component.
Further, it is connected with comparator between the first filter and phase discriminator, the comparator includes the
One comparator and the second comparator, the first comparator are connect with the first low-pass filter, and electric current of intermediate frequency component is shaped as
Electric current of intermediate frequency phase signal, second comparator are connect with the first high-pass filter, and high-frequency current component is shaped as high frequency
Current phase signal.
Further, the quantity of the phase discriminator is two, respectively intermediate frequency phase discriminator and high frequency phase discriminator, the intermediate frequency
Phase discriminator is connect with first comparator, and the high frequency phase discriminator is connect with the second comparator.
Further, the second filter includes mid-frequency low-pass filter and high frequency low-pass filter, respectively with intermediate frequency
Phase discriminator is connected with high frequency phase discriminator, and phase signal is become phase difference level signal according to the identification result of phase discriminator.
Further, the gain module includes the first gain module and the second gain module, is filtered respectively with mid-frequency low-pass
Wave device is connected with high frequency low-pass filter, and the output end of first gain module connects the first delay switch and sine wave mould
The output end of block, second gain module connects the second delay switch and triangular wave module.
Further, the sine wave freuqency that the first gain module exports is converted into sine wave wave by the sine wave module
Shape, and compare the phase of sine wave as the phase output of inverter output voltage intermediate frequency component to driving circuit, then by third
Device is shaped to voltage of intermediate frequency phase signal and is input to intermediate frequency phase discriminator；
The triangular wave frequency that second gain module exports is converted into triangular wave waveform by the triangular wave module, and by triangle
The phase of wave is shaped to high frequency to driving circuit, then by the 4th comparator as the phase output of inverter output voltage high fdrequency component
Voltage phase signal is input to high frequency phase discriminator.
Further, first delay switch input terminal connection sine wave original frequency and the first gain module it is defeated
Outlet, the output end of first delay switch connect the input terminal of the first gain module；The input of second delay switch
The output end connection second of the output end of end connection triangular wave original frequency and the second gain module, second delay switch increases
The input terminal of beneficial module.
Further, the phase discriminator includes two time delay module Y1And Y2, two d type flip flop D1And D2, one with door R1
With a NOT gate R2, time delay module Y1One end connects sine wave/triangular wave module, and the other end connects d type flip flop D1Clock signal
Port, time delay module Y2One end connects first filter, and the other end connects d type flip flop D2Clock signal port, with door R1With it is non-
Door R2After series connection, one end connection sine wave/triangular wave module and first filter, the other end are separately connected D1And D2Enabled letter
Number port, trigger D1And D2The port D connect VCC, output port connects VCC or ground connection according to the level of output.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1. sample rate current is separated into electric current of intermediate frequency component and high-frequency electrical by first filter by a kind of frequency tracking circuit
Flow component, reshaping are output to phase discriminator as current phase signal at square wave；Phase discriminator discriminating voltage phase signal and electric current
The phase difference of phase signal, output phase difference signal to second filter；Phase signal is become phase difference by second filter
Level signal is output to gain module；Also, sine wave/triangular wave that delay switch inputs feedback signal adjustment signal source
Initial frequency value is output to gain module after carrying out certain time-delay；Gain module judges phase difference level signal, according to phase difference
Level signal increases/reduces the frequency of the sine wave/triangular wave, then is output to delay switch, until sine wave/triangular wave reaches
Sine wave/triangular wave module is output to after to intrinsic frequency；Sine wave/triangular wave module is according to sine wave/triangular wave of input
Frequency conversion is output to driving circuit at sine wave/triangular wave waveform, and sine wave/triangular wave phase is defeated as inversion
Voltage intermediate frequency component/inverter output voltage high fdrequency component phase out, is shaped to voltage phase signal and is output to phase discriminator；It is described
Driving circuit works to load further according to sine wave/triangular wave waveform driving switch device；By accessing feedback signal tune
The frequency of section signal source sine wave and triangular wave controls the working frequency of load circuit, when load circuit voltage and current without
When phase difference, show that load circuit has worked on the resonance point of intermediate frequency and high frequency, the frequency of signal source will be stablized constant；Once
The working frequency of load circuit deviates from its intrinsic frequency, then signal source will continue to the phase signal fed back,
The frequency for changing sine wave and triangular wave in real time, makes load circuit rework in its intrinsic frequency, to calculate determination
Value carry out the frequency in setting signal source, guarantee the normal work of induction power supply.
2. in phase discriminator described in the utility model, due to voltage phase signal and current phase signal be all delayed one section when
Between just as the clock signal of trigger, so, when enable signal is equivalent to voltage phase signal and constant current phase signal
It is advanced by a period of time, is can guarantee in this way when NOT gate becomes 0 from 1, it will not be with voltage phase signal and current phase signal
Edge coincidence leads to the possible malfunction of trigger, keeps frequency tracking circuit operation more stable.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings, in which:
Fig. 1 is a kind of block diagram of frequency tracking circuit；
Fig. 2 is the detailed diagram of the utility model；
Fig. 3 is the schematic diagram of the utility model phase discriminator.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model, i.e., the described embodiments are only a part of the embodiments of the utility model,
Instead of all the embodiments.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be with each
Different configurations is planted to arrange and design.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Reality based on the utility model
Apply example, those skilled in the art's every other embodiment obtained without making creative work belongs to
The range of the utility model protection.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
A kind of frequency tracking circuit, in the actual motion for solving synchronous double-frequency induction heating power, load circuit is consolidated
There is frequency to change at any time, when larger with theoretical calculation difference, leads to not calculate the frequency that determining value comes setting signal source, very
To the problem of leading to induction power supply cisco unity malfunction.
A kind of frequency tracking circuit, first filter, phase discriminator, second filter, gain module including sequential connection,
Sine wave module/triangular wave module, driving circuit, and the delay switch being connect with gain module, sine wave module/tri-
Angular mode block is connect with phase discriminator；
Sample rate current is separated into electric current of intermediate frequency component and high-frequency current component by the first filter, and reshaping is at square wave
Phase discriminator is output to as current phase signal；
The phase difference of the phase discriminator discriminating voltage phase signal and current phase signal, output phase difference signal to second
Filter；
Phase signal is become phase difference level signal and is output to gain module by the second filter；
The delay switch carries out one to sine wave/triangular wave initial frequency value that feedback signal adjustment signal source inputs
Gain module is output to after fixed delay；
The gain module judges phase difference level signal, according to phase difference level signal increase/reduce the sine wave/
The frequency of triangular wave, then it is output to delay switch, sine wave/tri- are output to after sine wave/triangular wave reaches intrinsic frequency
Sine wave/triangular wave frequency is reduced certain numerical value, if phase difference is electric if phase difference level signal is positive by angular mode block
It is flat to be negative, then sine wave/triangular wave frequency is increased into certain numerical value, be output to after reaching intrinsic frequency sine wave/
Triangular wave module；
The sine wave/triangular wave module is converted into sine wave/triangular wave wave according to sine wave/triangular wave frequency of input
Shape is output to driving circuit, and exports electricity for sine wave/triangular wave phase as inverter output voltage intermediate frequency component/inversion
The phase for pressing high fdrequency component, is shaped to voltage phase signal and is output to phase discriminator；
The driving circuit works to load according to sine wave/triangular wave waveform driving switch device.
The utility model controls load electricity by the frequency of access feedback signal adjustment signal source sine wave and triangular wave
The working frequency on road shows that load circuit has worked in intermediate frequency and high frequency when the voltage and current of load circuit is without phase difference
Resonance point on, the frequency of signal source will be stablized constant；Once the working frequency of load circuit deviates from its intrinsic frequency,
Signal source will continue to the phase signal fed back, changes the frequency of sine wave and triangular wave in real time, makes load circuit
It reworks in its intrinsic frequency, to calculate the frequency that determining value comes setting signal source, is guaranteeing induction power supply just
Often work.
It is described in further detail below with reference to feature and performance of the embodiment to the utility model.
Embodiment one
A kind of frequency tracking circuit that the utility model preferred embodiment provides, as shown in Figure 1, including the to be linked in sequence
One filter, phase discriminator, second filter, gain module, sine wave module/triangular wave module, driving circuit, and and gain
The delay switch of module connection, the sine wave module/triangular wave module are connect with phase discriminator；
Sample rate current is separated into electric current of intermediate frequency component and high-frequency current component by the first filter, and reshaping is at square wave
Phase discriminator is output to as current phase signal；
The phase difference of the phase discriminator discriminating voltage phase signal and current phase signal, output phase difference signal to second
Filter；
Phase signal is become phase difference level signal and is output to gain module by the second filter；
The delay switch carries out one to sine wave/triangular wave initial frequency value that feedback signal adjustment signal source inputs
Gain module is output to after fixed delay；
The gain module judges phase difference level signal, according to phase difference level signal increase/reduce the sine wave/
The frequency of triangular wave, then it is output to delay switch, sine wave/tri- are output to after sine wave/triangular wave reaches intrinsic frequency
Sine wave/triangular wave frequency is reduced certain numerical value, if phase difference is electric if phase difference level signal is positive by angular mode block
It is flat to be negative, then sine wave/triangular wave frequency is increased into certain numerical value, be output to after reaching intrinsic frequency sine wave/
Triangular wave module；
The sine wave/triangular wave module is converted into sine wave/triangular wave wave according to sine wave/triangular wave frequency of input
Shape is output to driving circuit, and exports electricity for sine wave/triangular wave phase as inverter output voltage intermediate frequency component/inversion
The phase for pressing high fdrequency component, is shaped to voltage phase signal and is output to phase discriminator；
The driving circuit works to load according to sine wave/triangular wave waveform driving switch device.
As shown in Fig. 2, further, the first filter includes the first low-pass filter and the first high-pass filter,
First low-pass filter isolates electric current of intermediate frequency component from sample rate current, and first high-pass filter is from sample rate current
In isolate high-frequency current component.
Further, it is connected with comparator between the first filter and phase discriminator, the comparator includes the
One comparator and the second comparator, the first comparator are connect with the first low-pass filter, and electric current of intermediate frequency component is shaped as
Electric current of intermediate frequency phase signal, second comparator are connect with the first high-pass filter, and high-frequency current component is shaped as high frequency
Current phase signal.
Further, the quantity of the phase discriminator is two, respectively intermediate frequency phase discriminator and high frequency phase discriminator, the intermediate frequency
Phase discriminator is connect with first comparator, and the high frequency phase discriminator is connect with the second comparator.
Further, the second filter includes mid-frequency low-pass filter and high frequency low-pass filter, respectively with intermediate frequency
Phase discriminator is connected with high frequency phase discriminator, and phase signal is become phase difference level signal according to the identification result of phase discriminator.
Further, the gain module includes the first gain module and the second gain module, is filtered respectively with mid-frequency low-pass
Wave device is connected with high frequency low-pass filter, and the output end of first gain module connects the first delay switch and sine wave mould
The output end of block, second gain module connects the second delay switch and triangular wave module.
Further, the sine wave freuqency that the first gain module exports is converted into sine wave wave by the sine wave module
Shape, and compare the phase of sine wave as the phase output of inverter output voltage intermediate frequency component to driving circuit, then by third
Device is shaped to voltage of intermediate frequency phase signal and is input to intermediate frequency phase discriminator；
The triangular wave frequency that second gain module exports is converted into triangular wave waveform by the triangular wave module, and by triangle
The phase of wave is shaped to high frequency to driving circuit, then by the 4th comparator as the phase output of inverter output voltage high fdrequency component
Voltage phase signal is input to high frequency phase discriminator.
Further, first delay switch input terminal connection sine wave original frequency and the first gain module it is defeated
Outlet, the output end of first delay switch connect the input terminal of the first gain module；The input of second delay switch
The output end connection second of the output end of end connection triangular wave original frequency and the second gain module, second delay switch increases
The input terminal of beneficial module.
Further, the principle of the phase discriminator is as shown in figure 3, include two time delay module Y1And Y2, two d type flip flops
D1And D2, one with door R1With a NOT gate R2, time delay module Y1One end connects sine wave/triangular wave module, and the other end connects D touching
Send out device D1Clock signal port, time delay module Y2One end connects first filter, and the other end connects d type flip flop D2Clock letter
Number port, with door R1With NOT gate R2After series connection, one end connection sine wave/triangular wave module and first filter, the other end connect respectively
Meet D1And D2Enable signal port, trigger D1And D2The port D connect VCC, output port according to the level of output connect
VCC or ground connection.
Voltage phase signal is used as D after time delay module is delayed1Clock signal, current phase signal by delay make
For another D2Clock signal, meanwhile, voltage phase signal and current phase signal pass through R1And R2The signal conduct obtained afterwards
The enable signal of two d type flip flops.
Work as R2When signal is 1, D1And D2It is all enabled, when voltage phase signal is ahead of current phase signal, D1Output is
Positive level, duration are the phase difference of the two, D2Output is 0 level；When voltage phase signal lags behind current phase signal
When, D1Output is 0 level, D2Output is positive level, and the duration is the phase difference time that electric current is ahead of voltage.
Work as D1When output is positive level, D1The switch of connection is connected to VCC, D2Output is 0 level, D2The switch of connection is grounded,
Last output is positive level；Likewise, working as D1When output is 0 level, D1The switch of connection is grounded, D2Output is positive level, D2
The switch of connection is connected to VCC, and last output is negative level.
Since voltage phase signal and current phase signal have all been delayed a period of time just as the clock signal of trigger,
So enable signal is advanced by a period of time when being equivalent to voltage phase signal and constant current phase signal, can guarantee in this way
When NOT gate becomes 0 from 1, will not be overlapped with the edge of voltage phase signal and current phase signal leads to the possible mistake of trigger
It is dynamic.
The above is only the preferred embodiment of the utility model only, the protection model being not intended to limit the utility model
It encloses, anyone skilled in the art any modification made within spirit of the present utility model and principle is equally replaced
It changes and improves, should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of frequency tracking circuit, it is characterised in that: first filter, phase discriminator, second filter including sequential connection,
Gain module, sine wave module/triangular wave module, driving circuit, and the delay switch being connect with gain module, the sine
Wave module/triangular wave module is connect with phase discriminator；
Sample rate current is separated into electric current of intermediate frequency component and high-frequency current component by the first filter, and reshaping is at square wave conduct
Current phase signal is output to phase discriminator；
The phase difference of the phase discriminator discriminating voltage phase signal and current phase signal, output phase difference signal to the second filtering
Device；
Phase signal is become phase difference level signal and is output to gain module by the second filter；
The delay switch centainly prolongs sine wave/triangular wave initial frequency value that feedback signal adjustment signal source inputs
When after be output to gain module；
The gain module judges phase difference level signal, increases/reduce the sine wave/triangle according to phase difference level signal
The frequency of wave, then it is output to delay switch, sine wave/triangular wave is output to after sine wave/triangular wave reaches intrinsic frequency
Module；
The sine wave/triangular wave module is converted into sine wave/triangular wave waveform according to sine wave/triangular wave frequency of input,
It is output to driving circuit, and high using sine wave/triangular wave phase as inverter output voltage intermediate frequency component/inverter output voltage
The phase of frequency component is shaped to voltage phase signal and is output to phase discriminator；
The driving circuit works to load according to sine wave/triangular wave waveform driving switch device.
2. a kind of frequency tracking circuit according to claim 1, it is characterised in that: the first filter includes first low
Bandpass filter and the first high-pass filter, first low-pass filter isolate electric current of intermediate frequency component, institute from sample rate current
It states the first high-pass filter and isolates high-frequency current component from sample rate current.
3. a kind of frequency tracking circuit according to claim 2, it is characterised in that: the first filter and phase discriminator it
Between be connected with comparator, the comparator includes first comparator and the second comparator, the first comparator and first
Low-pass filter connection, is shaped as electric current of intermediate frequency phase signal, second comparator and the first high pass for electric current of intermediate frequency component
Filter connection, is shaped as high-frequency current phase signal for high-frequency current component.
4. a kind of frequency tracking circuit according to claim 3, it is characterised in that: the quantity of the phase discriminator is two,
Respectively intermediate frequency phase discriminator and high frequency phase discriminator, the intermediate frequency phase discriminator are connect with first comparator, the high frequency phase discriminator with
The connection of second comparator.
5. a kind of frequency tracking circuit according to claim 4, it is characterised in that: the second filter includes that intermediate frequency is low
Bandpass filter and high frequency low-pass filter, connect with intermediate frequency phase discriminator and high frequency phase discriminator respectively, according to the identification knot of phase discriminator
Phase signal is become phase difference level signal by fruit.
6. a kind of frequency tracking circuit according to claim 5, it is characterised in that: the gain module includes the first gain
Module and the second gain module, connect with mid-frequency low-pass filter and high frequency low-pass filter respectively, first gain module
Output end connect the first delay switch and sine wave module, the output end of second gain module connects the second delay switch
With triangular wave module.
7. a kind of frequency tracking circuit according to claim 6, it is characterised in that:
The sine wave freuqency that first gain module exports is converted into sine waveform by the sine wave module, and by sine wave
Phase is shaped to voltage of intermediate frequency to driving circuit, then by third comparator as the phase output of inverter output voltage intermediate frequency component
Phase signal is input to intermediate frequency phase discriminator；
The triangular wave frequency that second gain module exports is converted into triangular wave waveform by the triangular wave module, and by triangular wave
Phase is shaped to high frequency voltage to driving circuit, then by the 4th comparator as the phase output of inverter output voltage high fdrequency component
Phase signal is input to high frequency phase discriminator.
8. a kind of frequency tracking circuit according to claim 6, it is characterised in that: the input terminal of first delay switch
The output end of sine wave original frequency and the first gain module is connected, the output end of first delay switch connects the first gain
The input terminal of module；The output of input terminal connection the triangular wave original frequency and the second gain module of second delay switch
End, the output end of second delay switch connect the input terminal of the second gain module.
9. a kind of frequency tracking circuit according to claim 1, it is characterised in that: the phase discriminator includes two delay moulds
Block Y1And Y2, two d type flip flop D1And D2, one with door R1With a NOT gate R2, time delay module Y1One end connects sine wave/triangle
Wave module, the other end connect d type flip flop D1Clock signal port, time delay module Y2One end connects first filter, and the other end connects
Meet d type flip flop D2Clock signal port, with door R1With NOT gate R2After series connection, one end connects sine wave/triangular wave module and first
Filter, the other end are separately connected D1And D2Enable signal port, trigger D1And D2The port D connect VCC, output port
VCC or ground connection are connected according to the level of output.
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|---|---|---|---|
| CN201822143903.1U CN209435468U (en) | 2018-12-19 | 2018-12-19 | A kind of frequency tracking circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822143903.1U CN209435468U (en) | 2018-12-19 | 2018-12-19 | A kind of frequency tracking circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880808A (en) * | 2021-02-25 | 2021-06-01 | 广东博智林机器人有限公司 | Adaptive vibration frequency detection method and device, electronic equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880808A (en) * | 2021-02-25 | 2021-06-01 | 广东博智林机器人有限公司 | Adaptive vibration frequency detection method and device, electronic equipment and storage medium |
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