CN109004930A - Circuit system and control method based on the direct frequency, demodulation frequency modulated signal of phaselocked loop - Google Patents
Circuit system and control method based on the direct frequency, demodulation frequency modulated signal of phaselocked loop Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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Abstract
The invention proposes a kind of circuit systems and control method based on the direct frequency, demodulation frequency modulated signal of phaselocked loop, and wherein system includes: the amplification module of the radiofrequency signal of amplification input；Phase demodulation/frequency discriminator block obtains the frequency difference and phase difference of local oscillator and amplified radiofrequency signal；Frequency band limits module, and frequency band limitation module is connected with phase demodulation/frequency discriminator block, to limit bandwidth according to frequency difference and phase difference and be amplified；Controllable gain amplification module adjusts the amplitude that frequency band limits module output signal by controllable mode；The controllable frequency synthesizer module of frequency is connected with controllable gain amplification module and frequency discrimination/phase demodulation module, according to after gain adjustment frequency difference and phase difference signal generate corresponding frequency and change, with making frequency adjustment and tracking.The system has on the basis of realizing to conventional frequency shift-keying demodulation, moreover it is possible to the advantages of carrying out carrier frequency tracking and carrier error elimination, and structure is simple, and low in energy consumption, performance is strong.
Description
Technical field
The present invention relates to frequency demodulation technique fields, in particular to a kind of to be based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
Circuit system and control method.
Background technique
With the gradually development of wireless telecommunication system, traditional frequency modulated signal such as BFSK (Binary Frequency-
Shift Keying, two divided-frequency move keying), MSK (Minimum-Shift Keying, minimum frequency shift keying), GFSK (Gauss
Frequency Shift Keying, GFSK Gaussian Frequency Shift Keying) etc., it is all difficult to bring mentioning for apparent performance again for communication system
It rises.The BFSK communication modes of most original provide simplest system structure, and more complicated MSK, GFSK are provided preferably
Spectral occupancy, but as new modulation system enters bottleneck, system structure also gradually solidifies, and system performance is difficult to be mentioned
It rises.
It for existing system, is connect by down-conversion receiver (zero intermediate frequency reciver), a secondary down coversion
Mechanism is received at biggish limitation on circuit structure --- essential core module can not be reduced, power consumption can not continue reduction,
Structure can not continue to simplify.With the gradually development of wireless telecommunication system, traditional frequency modulated signal such as BFSK uses two
Frequency representative sends 1 or 0；MSK conversion frequency in signal zero passage keeps Phase Continuation；GFSK is used on the basis of MSK
Gaussian envelope etc. is all difficult to bring the promotion of apparent performance for communication system again.The BFSK communication modes of most original provide
Simplest system structure, more complicated MSK, GFSK provide preferable spectral occupancy, but with new modulation methods
Formula enters bottleneck, and system structure also gradually solidifies, and system performance is difficult to get a promotion.
The structure of Mainstream sink machine is mainly made of preposition amplification, down coversion, signal demodulation three parts.It is preposition amplification and under
Frequency conversion section is due to having used RF Amplifier Module and local oscillator, so that its power consumption can not reduce.And signal demodulation part
It is generally necessary to which a high performance analogue-to-digital converters or frequency demodulator convert a signal into binary-level signal, function
It consumes still higher.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, it is an object of the invention to propose a kind of circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
System, which is able to carry out carrier frequency tracking and carrier error is eliminated, and eliminates analog-digital converter or frequency demodulator, simultaneously
Frequency demodulation output is still provided, structure is simple, and low in energy consumption, performance is strong.
In order to achieve the above objectives, the invention proposes a kind of circuit systems based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
System, comprising: amplify the RF Amplifier Module of the radiofrequency signal of input；Phase demodulation/frequency discriminator block, the phase demodulation/frequency discriminator block with penetrate
The frequency amplification module frequency synthesizer module controllable with frequency is connected, and is closed with obtaining RF Amplifier Module and the controllable frequency of frequency
The frequency difference and phase difference of signal caused by module of growing up to be a useful person the two；Frequency band limits module, frequency band limitation module with
Frequency discrimination/phase demodulation module is connected, with the bandwidth of limit frequency difference and phase difference signal；Controllable gain amplification module, it is described can
Control gain amplification module is connected with frequency band limitation module, and the bandwidth for representing frequency difference and phase difference is limited
Signal carries out Linear Amplifer；And the frequency synthesizer module that frequency is controllable, the controllable frequency synthesizer module of the frequency with
Controllable gain amplification module is connected with frequency discrimination/phase demodulation module, receives the signal for representing frequency difference and phase difference, and root
The output frequency of itself is controlled, according to this signal to realize that adjustment and the tracking of frequency are gone forward side by side line frequency negative-feedback.
Circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of the invention, is obtained by frequency discrimination/phase demodulation module
Take the frequency difference and phase of frequency synthesizer module that frequency is controllable and the radiofrequency signal after RF Amplifier Module amplifies
Potential difference is different and carries out limitation frequency bandwidth and amplification by frequency band limitation module and controllable gain amplification module, according to two signals
Frequency difference and phase difference generate corresponding frequency variation, with making frequency adjustment and tracking, reach and are realizing to conventional frequency
It moves on the basis of keying demodulation, carries out the purpose of carrier frequency tracking and carrier error elimination, and structure is simple, it is low in energy consumption,
Performance is strong.
Further, in one embodiment of the invention, the controllable frequency synthesizer module of the frequency is that frequency can
Control oscillator, the signal source that the controllable signal generator of frequency or other forms frequency can be controlled by signal.
Further, in one embodiment of the invention, the phase demodulation/frequency discriminator block is according to the frequency connected
The difference on the frequency and phase difference of the controllable frequency synthesizer module of rate and two signals of RF Amplifier Module access generate special
The circuit module or unit of setting formula output.The difference on the frequency and phase difference of output signal and two signals have it is specific linear or
Non-linear relation, and this relationship need be it is dull, i.e., when phase difference or larger difference on the frequency absolute value, the output of generation is believed
Number amplitude absolute value need to be not less than phase difference or smaller difference on the frequency absolute value when absolute value.
Further, in one embodiment of the invention, state frequency band limitation module, for a bandwidth be higher than it is described based on
The low-pass filter of the loop bandwidth of the circuit system of the direct frequency, demodulation frequency modulated signal of phaselocked loop.
Further, in one embodiment of the invention, the controllable gain amplification module is adjustable input letter
Amplifier number with output signal amplification factor, wherein the amplitude of output signal is the specific factor of the amplitude of input signal, and
This multiple can be adjusted.
Further, in one embodiment of the invention, the RF Amplifier Module is operate on putting for radio frequency band
Big device does Linear Amplifer to signal.
Further, in one embodiment of the invention, further includes: acquisition module, for acquiring the controllable gain
Output of the signal of the output end of amplification module as Demodulation Systems, this signal is either voltage is also possible to electric current.
Further, in one embodiment of the invention, signal caused by the phase demodulation/frequency discriminator block can be electricity
Pressure is also possible to electric current.
Further, in one embodiment of the invention, the output monotonicity of the phase demodulation/frequency discriminator block can be by two
Kind mode is realized:
Digital implementation: in two signals, the signal phase of RF Amplifier Module output provides high level when advanced,
Phase provides low level when falling behind；Or vice versa.
Simulated implementation mode: in two signals, positive electricity electricity is provided when the phase of output signal of RF Amplifier Module is advanced
Pressure or electric current, phase difference is bigger, and the amplitude of voltage or electric current is also bigger, and the phase of output signal of RF Amplifier Module is given when falling behind
Negative voltage or electric current out, phase difference is bigger, and the amplitude of voltage or electric current is also bigger；Or vice versa.
Another object of the present invention is in order to propose a kind of circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
Control method, comprising the following steps: amplify the radiofrequency signal of input；Obtain local oscillator and amplified radiofrequency signal
Frequency difference and phase difference；Bandwidth is limited according to the frequency difference and the phase difference；According to described by the band tolerance
The frequency difference and phase difference signal of system carry out controllable, adjustable gain amplification；And it is limited according to described by frequency band
Corresponding frequency variation is generated with the amplified frequency difference of gain of controllable section and the phase difference, to carry out frequency
Adjustment and tracking.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of a traditional down-conversion receiver system；
Fig. 2 is the structural schematic diagram of a receiver that can distinguish and demodulate BFSK and GFSK signal；
Fig. 3 is the control according to the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of the embodiment of the present invention
The structural schematic diagram of system；
Fig. 4 is the schematic diagram that the modulation system of BFSK signal is debugged according to one embodiment of the invention；
Fig. 5 is to debug the signal wave that BFSK signal is observed in first low pass filter output according to one embodiment of the invention
Shape schematic diagram；With
Fig. 6 is the control according to the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of the embodiment of the present invention
The flow chart of method.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Firstly, in the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop for introducing proposition of the embodiment of the present invention
Before, the digital demodulation receiver and analog demodulator for first introducing common frequency, demodulation frequency modulated signal in the related art receive
Machine.Fig. 1 is a traditional down coversion digital demodulation receiver system structural schematic diagram, as shown in Figure 1, signal is from left-hand amplifier
Input, transforms to low frequency by frequency mixer, again passes by low-frequency amplifier and amplify, be converted to number by analog-digital converter
It is handled after signal by digital filter, obtains the baseband signal modulated.
But the Conversion Receiver is when working, when, there are when carrier deviation, becoming under frequency mixer between receiver and transmitter
The result of frequency will be inaccurate, causes after analog-digital converter, and signal is each after the center frequency point and down coversion of digitized filtered device
From center frequency point it is different, can not effectively demodulate.
Further, the conversion receiver architecture is simple, but still local oscillated signal is needed to generate, and needs to manually adjust
Local oscillated signal is synchronous with transmitter, can only be more troublesome in actual use by making an appointment.And when there are deviations in system
When, it can not adjust automatically.
Fig. 2 is the structural schematic diagram of an analog demodulator receiver that can distinguish and demodulate BFSK and GFSK signal, such as
Shown in Fig. 2: signal extracts the frequency information of signal by frequency discriminator after amplification, mixing, amplifying again, it is understood that
Its frequency is represented for the amplitude of the signal after this module, then frequency information is translated as digital letter by analog-digital converter
Number.This digital signal passes through the matched filter of square wave and high bass wave, obtains two-way output.For comparison, make in Fig. 1
The signal of frequency information is obtained represent with digital filter；Circuit module in Fig. 2 directly using simulation produces this
Signal after this signal is converted to digital signal by analog-digital converter, can be exported directly.In Fig. 2 after analog-digital converter
The filter connected is only to distinguish used in different modulating mode, can be omitted when needing not distinguish between modulation system.1 is exported in Fig. 2
Corresponding square wave matched filter when output 1 is effective, indicates that the frequency for receiving signal at this time changes similar square wave, is more nearly
BFSK signal；Export 2 it is effective when, indicate that the frequency for receiving signal at this time changes similar high bass wave, be more nearly GFSK.It sees simultaneously
Output 1 and output 2 are examined, can compare and show that the signal being currently received is BFSK or GFSK signal, while available letter
Number 0/1 code stream (namely demodulation after signal).But the receiver can not provide automatic carrier tracking, in transmitter and receive
Performance decline can be still generated when the local frequency difference of machine, while being configured complex.But since the structure of Fig. 2 uses circuit
Module directly carries out frequency demodulation, and the performance of analog-to-digital convertor in circuit system can suitably be loosened, to reduce compared to 1
The pressure of system design.
The present invention is based on the above problems, and proposes a kind of electricity based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
Road system.
Describe to propose according to embodiments of the present invention with reference to the accompanying drawings based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
Circuit system and method, describe to propose according to embodiments of the present invention first with reference to the accompanying drawings based on the direct JieDuHuaYu II Decoction of phaselocked loop
The circuit system of rate modulated signal.
Fig. 3 is that the circuit system structure based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of one embodiment of the invention shows
It is intended to.
As shown in figure 3, being somebody's turn to do the circuit system 10 based on the direct frequency, demodulation frequency modulated signal of phaselocked loop includes: radio frequency amplification mould
Block 100, phase demodulation/frequency discriminator block 200, frequency band limitation module 300, controllable gain amplification module 400 and the controllable frequency of frequency are closed
Module of growing up to be a useful person 500.
Amplify the RF Amplifier Module 100 of the radiofrequency signal of input.
In one embodiment of the invention, RF Amplifier Module 100 is operate on the amplifier of radio frequency band, to signal
Do Linear Amplifer.
Phase demodulation/frequency discriminator block 200, phase demodulation/frequency discriminator block 200 and RF Amplifier Module and the controllable Senthesizer module of frequency
It is connected, to obtain the frequency difference and phase difference of local oscillator and amplified radiofrequency signal.
In one embodiment of the invention, phase demodulation/frequency discriminator block 200 is the frequency conjunction controllable according to the frequency connected
The difference on the frequency and phase difference of module of growing up to be a useful person and two signals of RF Amplifier Module access generate the circuit mould of particular form output
Block or unit.The difference on the frequency and phase difference of output signal and two signals have specific linearly or nonlinearly relationship, and this
Relationship need be it is dull, i.e., when phase difference or larger difference on the frequency absolute value, the absolute value of the amplitude of the output signal of generation
Absolute value when phase difference or smaller difference on the frequency absolute value need to be not less than.
In one embodiment of the invention, signal caused by phase demodulation/frequency discriminator block 200 can be voltage and be also possible to
Electric current.
In one embodiment of the invention, the output monotonicity of phase demodulation/frequency discriminator block 200 can be by two ways reality
Existing: digital implementation: in two signals, the signal phase of RF Amplifier Module output provides high level, phase when advanced
Low level is provided when falling behind；Or vice versa.Simulated implementation mode: in two signals, the phase of output signal of RF Amplifier Module
Positive piezoelectric voltage or electric current are provided when advanced, phase difference is bigger, and the amplitude of voltage or electric current is also bigger, the output of RF Amplifier Module
Signal phase provides negative voltage or electric current when falling behind, and phase difference is bigger, and the amplitude of voltage or electric current is also bigger；Or vice versa.
In one embodiment of the invention, when the output of phase demodulation/frequency discriminator block 200 is voltage form, have it is adjustable or
Predefined common-mode voltage, to assist the circuit design of subsequent module.
Specifically, in another embodiment of the present invention, phase demodulation/frequency discriminator block 200 is exemplary frequency device and/or mirror
Phase device.When using frequency discriminator in foregoing circuit, it is possible to will lead to positive feedback, cause that stable frequency negative-feedback cannot be established
Consequence.But can avoid this problem using phase discriminator, so phase discriminator can be only used in foregoing circuit structure；Together
When can also start frequency discriminator when frequency difference is larger (such as when just starting), after feedback control loop is gradually built up, starting
Phase discriminator.In short, loop can establish negative-feedback automatically under the structure of setting reaches balance.
Frequency band limits module 300, and frequency band limitation module 300 is connected with phase demodulation/frequency discriminator block 200, according to frequency difference
Bandwidth is limited with phase difference.
In one embodiment of the invention, frequency band limits module 300, is directly solved for what a bandwidth was higher than based on phaselocked loop
Adjust the low-pass filter of the loop bandwidth of the circuit system of frequency modulated signal.
Controllable gain amplification module 400, controllable gain amplification module 100 and frequency band limitation module are connected 300, according to warp
The frequency difference and phase difference signal for crossing bandwidth limitation carry out controllable, adjustable gain amplification.
In one embodiment of the invention, controllable gain amplification module 400 is that adjustable input signal and output are believed
The amplifier of number amplification factor, wherein the amplitude of output signal is the specific factor of the amplitude of input signal, and this multiple can
It is adjusted.
The controllable frequency synthesizer module 500 of frequency, the controllable frequency synthesizer module 500 of frequency and controllable gain amplify
Module 400 is connected with phase demodulation/frequency discriminator block 200, according to the amplified frequency of gain by frequency band limitation and controllable section
Rate difference and phase difference generate corresponding frequency variation, with making frequency adjustment and tracking.
In one embodiment of the invention, the controllable frequency synthesizer module 500 of frequency is controllable-frequency oscillator, frequency
The signal source that the controllable signal generator of rate or other forms frequency can be controlled by signal.
Specifically, in one embodiment of the invention, it is as shown in Figure 4 and Figure 5, (false when to BFSK signal modulation
If 1011) signal to be sent is, process is as follows: when there are frequency shift (FS)s with receiver for transmitter, and frequency shift (FS) is in certain model
When enclosing interior, (or with certain relationship) signal table directly proportional to frequency shift (FS) can be observed in first low pass filter output
It is existing.Meanwhile after frequency departure is able to tracking, this phenomenon disappears.That is, when generating frequency shift (FS) suddenly, low-pass filter
Output end have corresponding variation, and have of short duration " output is an invalid " time.
It is understood that the local oscillator linearity determines the frequency discrimination linearity, so that the design of above-mentioned frequency discriminator is significantly
Simplify, the linearity greatlys improve (for digitizing controlled oscillator, linear frequency modulation curve is relatively easy to).
Circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of the invention, is obtained by frequency discrimination/phase demodulation module
Take the frequency difference and phase of frequency synthesizer module that frequency is controllable and the radiofrequency signal after RF Amplifier Module amplifies
Potential difference is different and carries out limitation frequency bandwidth and amplification by frequency band limitation module and controllable gain amplification module, according to two signals
Frequency difference and phase difference generate corresponding frequency variation, with making frequency adjustment and tracking, reach and are realizing to conventional frequency
It moves on the basis of keying demodulation, carries out the purpose of carrier frequency tracking and carrier error elimination, and structure is simple, it is low in energy consumption,
Performance is strong.
Referring next to attached drawing description propose according to embodiments of the present invention based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
Circuit system control method.
Fig. 6 is the control according to the circuit system method based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of the embodiment of the present invention
The flow chart of method processed.
As shown in fig. 6, should circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop control method include with
Lower step: S101 amplifies the radiofrequency signal of input；S102 obtains the difference on the frequency of local oscillator and amplified radiofrequency signal
Different and phase difference；S103 limits bandwidth according to frequency difference and phase difference；S104, controllable gain amplification module are controllable to increase
Beneficial amplification module is connected with frequency band limitation module, and being carried out with the frequency difference and phase difference signal according to process bandwidth limitation can
Control, the amplification of adjustable gain；S105, the controllable frequency synthesizer module of frequency, the controllable frequency synthesizer module of frequency with
Controllable gain amplification module is connected with phase demodulation/frequency discriminator block, to amplify according to by frequency band limitation and the gain of controllable section
Frequency difference and phase difference afterwards generates corresponding frequency variation, with making frequency adjustment and tracking.
It should be noted that the aforementioned solution to the circuit system embodiment based on the direct frequency, demodulation frequency modulated signal of phaselocked loop
The control method that explanation is also applied for the embodiment is released, details are not described herein again.
The control method of the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of the embodiment of the present invention, passes through
It obtains the frequency difference of local oscillator and amplified radiofrequency signal and phase difference and amplifies, according to frequency difference and phase
Difference generates corresponding frequency variation, with making frequency adjustment and tracking, reaches and is realizing the base to conventional frequency shift-keying demodulation
On plinth, the purpose of carrier frequency tracking and carrier error elimination is carried out, and structure is simple, low in energy consumption, performance is strong.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop characterized by comprising
RF Amplifier Module, for amplifying the radiofrequency signal of input；
Phase demodulation/frequency discriminator block, the phase demodulation/frequency discriminator block are connected with the RF Amplifier Module, with obtain local oscillator and
The frequency difference and phase difference of amplified radiofrequency signal；
Frequency band limits module, and frequency band limitation module is connected with the phase demodulation/frequency discriminator block, with according to the frequency difference with
The phase difference limits bandwidth；
Controllable gain amplification module, the controllable gain amplification module is connected with frequency band limitation module, according to the warp
The signal of the frequency difference and phase difference of crossing bandwidth limitation carries out controllable, adjustable gain amplification；And
The controllable frequency synthesizer module of frequency, the controllable frequency synthesizer module of the frequency are put with the controllable gain respectively
Big module is connected with the phase demodulation/frequency discriminator block, after according to the gain amplification limited by frequency band with controllable section
Frequency difference and the phase difference generate the variation of corresponding frequency, with making frequency adjustment and tracking.
2. the circuit system according to claim 1 based on the direct frequency, demodulation frequency modulated signal of phaselocked loop, which is characterized in that
The controllable frequency synthesizer module of the frequency be the controllable signal generator of controllable-frequency oscillator, frequency or by signal into
The signal source of row control.
3. the circuit system according to claim 1 based on the direct frequency, demodulation frequency modulated signal of phaselocked loop, which is characterized in that
Phase demodulation/the frequency discriminator block is the frequency synthesizer module and the RF Amplifier Module controllable according to the frequency connected
Access two signals difference on the frequency and phase difference generate particular form output circuit module or unit, output signal with two
The difference on the frequency and phase difference of signal have a specific linearly or nonlinearly relationship, and this relationship need be it is dull, work as phase
When difference or difference on the frequency absolute value are larger, the absolute value of the amplitude of the output signal of generation need to be absolute not less than phase difference or difference on the frequency
Absolute value when being worth smaller.
4. the circuit system according to claim 1 based on the direct frequency, demodulation frequency modulated signal of phaselocked loop, which is characterized in that
The frequency band limits module, is higher than the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop for a bandwidth
The low-pass filter of loop bandwidth.
5. the circuit system according to claim 1 based on the direct frequency, demodulation frequency modulated signal of phaselocked loop, which is characterized in that
The controllable gain amplification module is the amplifier for adjusting input signal and output signal amplification factor, wherein the width of output signal
Degree is the presupposition multiple of the amplitude of input signal.
6. the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop stated according to claim 1, which is characterized in that institute
The amplifier that RF Amplifier Module is operate on radio frequency band is stated, Linear Amplifer is done to signal.
7. the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop stated according to claim 1, which is characterized in that also
Include:
Acquisition module, the signal of the output end for acquiring the controllable gain amplification module, the signal is as Demodulation Systems
Output, the signal be voltage or electric current.
8. the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop stated according to claim 1, which is characterized in that institute
Stating signal caused by phase demodulation/frequency discriminator block is voltage or electric current.
9. the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop stated according to claim 1, which is characterized in that institute
Phase demodulation/frequency discriminator block output monotonicity is stated to be realized by two ways:
Digital implementation: in two signals, the signal phase of RF Amplifier Module output provides high level, phase when advanced
Low level is provided when falling behind；Or vice versa；
Simulated implementation mode: in two signals, provided when the phase of output signal of RF Amplifier Module is advanced positive piezoelectric voltage or
Electric current, phase difference is bigger, and the amplitude of voltage or electric current is also bigger, and the phase of output signal of RF Amplifier Module provides negative when falling behind
Voltage or electric current, phase difference is bigger, and the amplitude of voltage or electric current is also bigger；Or vice versa.
10. a kind of control method of the circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop, which is characterized in that use
Such as the described in any item circuit systems based on the direct frequency, demodulation frequency modulated signal of phaselocked loop of claim 1-9, wherein the side
Method the following steps are included:
Amplify the radiofrequency signal of input；
Obtain the frequency difference and phase difference of local oscillator and amplified radiofrequency signal；
Bandwidth is limited according to the frequency difference and the phase difference；
Controllable, adjustable gain amplification is carried out according to the frequency difference by bandwidth limitation and phase difference signal；With
And
It is generated according to described by the amplified frequency difference of gain and the phase difference of frequency band limitation and controllable section
Corresponding frequency variation, with making frequency adjustment and tracking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811150180.6A CN109004930B (en) | 2018-09-29 | 2018-09-29 | Circuit system for directly demodulating frequency modulation signal based on phase-locked loop and control method |
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| CN201811150180.6A CN109004930B (en) | 2018-09-29 | 2018-09-29 | Circuit system for directly demodulating frequency modulation signal based on phase-locked loop and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600781A (en) * | 2020-11-08 | 2021-04-02 | 南京中感微电子有限公司 | Envelope-variable frequency shift keying modulation and demodulation method and equipment |
| CN115529054A (en) * | 2022-09-13 | 2022-12-27 | 清华大学 | Phase tracking receiver system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605904A (en) * | 1984-05-15 | 1986-08-12 | U.S. Philips Corporation | Phase locked loop frequency demodulator having an adjustable bandwidth |
| CN1139507A (en) * | 1993-12-29 | 1997-01-01 | 齐尼思电子公司 | Circuit for the acquisition of a carrier signal by applying a substitute pilot to a synchronous demodulator |
| US5631601A (en) * | 1993-09-29 | 1997-05-20 | Sgs-Thomson Microelectronics Limited | FM demodulation with a variable gain phase locked loop |
| CN102761408A (en) * | 2012-05-29 | 2012-10-31 | 武汉天喻信息产业股份有限公司 | Radio frequency processing module, radio frequency card and radio frequency processing method |
| CN206559338U (en) * | 2017-03-30 | 2017-10-13 | 天津中兴智联科技有限公司 | A kind of superhet for ETC |
| CN208548880U (en) * | 2018-09-29 | 2019-02-26 | 清华大学 | Circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop |
-
2018
- 2018-09-29 CN CN201811150180.6A patent/CN109004930B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605904A (en) * | 1984-05-15 | 1986-08-12 | U.S. Philips Corporation | Phase locked loop frequency demodulator having an adjustable bandwidth |
| US5631601A (en) * | 1993-09-29 | 1997-05-20 | Sgs-Thomson Microelectronics Limited | FM demodulation with a variable gain phase locked loop |
| CN1139507A (en) * | 1993-12-29 | 1997-01-01 | 齐尼思电子公司 | Circuit for the acquisition of a carrier signal by applying a substitute pilot to a synchronous demodulator |
| CN102761408A (en) * | 2012-05-29 | 2012-10-31 | 武汉天喻信息产业股份有限公司 | Radio frequency processing module, radio frequency card and radio frequency processing method |
| CN206559338U (en) * | 2017-03-30 | 2017-10-13 | 天津中兴智联科技有限公司 | A kind of superhet for ETC |
| CN208548880U (en) * | 2018-09-29 | 2019-02-26 | 清华大学 | Circuit system based on the direct frequency, demodulation frequency modulated signal of phaselocked loop |
Non-Patent Citations (1)
| Title |
|---|
| RANRAN ZHOU 等: "2.4GHz 20Mb/s FSK receiver front-end and transmitter modulation PLL design for energy-efficient short-range communicaiton", 2016 IEEE INTERNATIONAL CONFERENCE ON ELECTRON DEVICES AND SOLID-STATE CIRCUITS (EDSSC) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600781A (en) * | 2020-11-08 | 2021-04-02 | 南京中感微电子有限公司 | Envelope-variable frequency shift keying modulation and demodulation method and equipment |
| CN115529054A (en) * | 2022-09-13 | 2022-12-27 | 清华大学 | Phase tracking receiver system |
| CN115529054B (en) * | 2022-09-13 | 2024-05-28 | 清华大学 | Phase tracking receiver system |
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| Publication number | Publication date |
|---|---|
| CN109004930B (en) | 2024-05-28 |
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