CN106559075A - Numerical frequency source generator - Google Patents
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Abstract
The invention discloses a kind of numerical frequency source generator, aim to provide one kind and can improve frequency source stability and the quick numerical frequency source generator of frequency source locking, solve frequency source output unstable, the slower problem of locking, its drip irrigation device is that the voltage-controlled oscillator has been also coupled to preset voltage module, and the preset voltage module includes digital to analog converter and single-chip microcomputer；The single-chip microcomputer is to provide digital drive signals；The digital to analog converter is coupled to single-chip microcomputer to receive digital drive signals and export analog voltage signal；The voltage-controlled oscillator is coupled to digital to analog converter to receive analog voltage signal to produce original frequency source in advance；The input of the voltage-controlled oscillator has been also coupled to voltage buffer module, and the voltage buffer module is to absorb due to voltage spikes.Frequency source output is reached stable, quickly, effect easy to adjust, the present invention are applied to wireless communication technology field for locking.
Description
Technical field
The present invention relates to a kind of wireless communication technology field, more specifically, it relates to a kind of numerical frequency source generator.
Background technology
Frequency source is electronic system（Radar, communication, observing and controlling, navigation etc.）Baseband signal source, mainly include two class of fixing point frequency frequency source and frequency synthesis source.Frequency synthesis source can be divided into direct-type and indirect type by its constituted mode also known as frequency synthesizer or frequency synthesizer.
Frequency synthesizer adopts phaselocked loop (PLL) technology indirectly, is most widely used at present.This synthetic method using circuit be that phase feedback control is realized so as to realize the closed loop system of frequency-tracking by phase demodulation.With the development of semiconductor technology, numerical frequency source generator is also constantly developing.
Output signal mutually being made an uproar in loop bandwidth in frequency of phase locking source mainly affected by reference signal, phase discriminator, frequency divider and frequency dividing ratio, and voltage-controlled oscillator is depended primarily on beyond loop bandwidth（VCO）Mutually make an uproar.Select the reference source and VCO, the phase discriminator of Low phase noise of Low phase noise（PD）With frequency divider to drop Low phase noise be also critically important.Loop is all relevant with loop design to noise suppression feature, loop additional phase noise etc. inside and outside band, therefore characteristic optimizing of mutually making an uproar is particularly significant.
Need ultrashort signal is converted to the signal of hyper band in general signal process, to meet the reception demand of the reception device of each frequency range, the reception frequency range of such as radar is in 8-40GHkz, and the frequency range of artificial ionization's communication is generally 30-144Mhz, so needing first to process the frequency range of artificial ionization's communication by broken number frequency division synthesizer, can there is the contradiction between high-resolution and low noise in by broken number frequency division synthesizer processing procedure, when high-resolution will be realized, phase demodulation frequency must be very low, and now frequency dividing ratio N is very big；At the same time noise can be increased in the way of 20lgN, be greatly degrading mutually making an uproar for signal, and limit loop bandwidth, be unfavorable for quick lock in, and application is very limited, while can also exist spuious.
At present, on market（The Chinese patent of Application No. CN200710048686.1 discloses a kind of broken number frequency division synthesizer）It passes through the second control circuit that literal register and comparator are constituted, the input of second control circuit is connected with first control circuit, outfan is connected with pulse corrector, phase noise is reduced by second control circuit, but this circuit structure is realizing requiring for 100MHz frequencies are difficult to meet, and for the signal source of electronic system needs the input signal of 100MHz is converted to the high-frequency signal source of 6-12GHz, for the design of whole system needs to redesign.
After broken number frequency division synthesizer process, resulting signal source needs the signal for being changed the hyper band required for just becoming again simultaneously, still can there is a problem of mutually making an uproar in transformation process with it is spuious, and the signal source obtained by after broken number frequency division synthesizer process is discrete signal source, with larger interval, the equipment of different frequency range is needed to correspond to therewith, could realize being converted to which function of ultra-high frequency band signal, so needing to purchase multiple devices, cost increases, and inconvenience occurs in use, needs go constantly replacing, so the numerical frequency source generator for being used at present has certain room for improvement.
For frequency source of the prior art as feedback circuit has inertia, its frequency lock speed is slower, its locking（Frequency error factor）Speed is related with loop bandwidth, initial frequency difference, and for numerical frequency source generator during upper electricity voltage controlled oscillator（VCO）Control voltage cause the original frequency of frequency source output unstable due to there is larger deviation, and cause frequency lock further slack-off, therefore for accelerating frequency source frequency quick lock in and stably output facet has much room for improvement.
Further, prior art improves numerical frequency source generator by the way of phaselocked loop and digital circuit are combined, and there is more switch element in digital circuit, by switch element to voltage controlled oscillator（VCO）A good method of can yet be regarded as is adjusted, but for switch element is adjusting voltage controlled oscillator（VCO）When there are problems that one is difficult to solve, the unstable situation in frequency of occurrences source when being exactly the electricity on numerical frequency source generator, its reason is the discovery that by analysis and research and be operated in the state of continuous alternate conduction and shut-off due to switch element, to voltage controlled oscillator（VCO）Affect very big, therefore the scheme research and development using digital circuit are obstructed, and need using a new scheme to solve problem above.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide one kind can improve frequency source stability and frequency source locks quick numerical frequency source generator.
For achieving the above object, the invention provides following technical scheme：A kind of numerical frequency source generator, including wave band input and wave band outfan, the wave band input accesses outside source, phase-locked loop circuit is coupled between the wave band input and wave band outfan, the phase-locked loop circuit includes first voltage control agitator and the second phase discriminator, the first voltage control agitator and the second phase discriminator form loop, the first voltage controls oscillator output frequencies source signal, the first voltage control agitator has been also coupled to preset voltage module, and the preset voltage module includes digital to analog converter and single-chip microcomputer；
The single-chip microcomputer is to provide digital drive signals；
The digital to analog converter is coupled to single-chip microcomputer to receive digital drive signals and export analog voltage signal；
The first voltage control agitator is coupled to digital to analog converter to receive analog voltage signal to produce original frequency source in advance.
Preferably, the input of the first voltage control agitator has been also coupled to voltage buffer module, and the voltage buffer module is to absorb surge voltage.
Preferably, the voltage buffer module includes electric capacity, and described electric capacity one end is connected with voltage buffer module, other end ground connection.
Preferably, the phase-locked loop circuit also includes the first frequency mixer and doubler handover module；
The doubler handover module is used for the doubler for switching different multiples,
The doubler handover module is coupled to wave band input to receive outside source, and output switching frequency-doubled signal；
First frequency mixer is coupled between doubler handover module and first voltage control agitator, to receive switching frequency-doubled signal and frequency source signal respectively, and exports the first mixed frequency signal；
The first frequency divider is coupled between second phase discriminator and wave band input；
First frequency divider is coupled to wave band input to receive outside source, and exports the first fractional frequency signal；
The input of second phase discriminator is coupled to the first frequency divider to receive the first fractional frequency signal, and the feedback end of second phase discriminator is coupled to the first frequency mixer to receive the first mixed frequency signal, and the outfan of second phase discriminator is exporting phase discrimination signal；
The control end of the first voltage control agitator is coupled to the outfan of the second phase discriminator to receive phase discrimination signal and control oscillator output frequencies source to wave band outfan to control first voltage in response to phase discrimination signal.
Preferably, the frequency source generating meanss also include fractional frequency division synthesis module, and the fractional frequency division synthesis module includes frequency input, external signal source output terminal, broken number frequency division synthesizer, second voltage control agitator, frequency tripler and three-mixer；
The frequency input accesses fixed frequency；
The frequency input is coupled to broken number frequency division synthesizer, second voltage control agitator and external signal source output terminal successively；
The broken number frequency division synthesizer is to export fractional frequency division signal；
The input of the frequency tripler is coupled to frequency input, for receiving outside source and exporting frequency tripling signal；
The input of the three-mixer is coupled to the outfan of frequency tripler, and for receiving frequency tripling signal and exporting the 3rd mixed frequency signal, the local oscillations source of the three-mixer is provided by second voltage control agitator；
The first phase discriminator has been also coupled between the broken number frequency division synthesizer and second voltage control agitator；
The input of first phase discriminator is coupled to the outfan of broken number frequency division synthesizer, for receiving fractional frequency division signal, the feedback end of first phase discriminator is coupled to the outfan of three-mixer to receive the 3rd mixed frequency signal, and the outfan of first phase discriminator is exporting the first phase discrimination signal；
The control end of the second voltage control agitator is coupled to the outfan of the first phase discriminator, for receiving the first phase discrimination signal and exporting first oscillator signal to external signal source output terminal to control second voltage control agitator in response to the first phase discrimination signal；
External signal source output terminal is coupled to wave band input to provide outside source.
Preferably, the doubler handover module includes the first switching doubler, the second switching doubler and switching switch；
The first switching doubler is the doubler of two frequencys multiplication；
Doubler of the second switching doubler for frequency tripling；
The switching switch is respectively coupled to the first switching doubler with the second switching doubler for switching over the second switching doubler to the first switching doubler.
Preferably, the switching switch includes first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT) of linkage setting, and the stationary contact of first single-pole double-throw switch (SPDT) is coupled to wave band input, and the stationary contact of second single-pole double-throw switch (SPDT) is coupled to the first frequency mixer.
Preferably, the second frequency mixer is coupled between first frequency mixer and the second phase discriminator, between first frequency mixer and wave band input, is coupled with the second frequency divider；
Second frequency divider is coupled to wave band input to receive outside source, and exports the second fractional frequency signal；
Second frequency mixer is coupled to the second frequency divider to receive the second fractional frequency signal, and exports the second mixed frequency signal, and the local oscillations source of second frequency mixer is provided by the first mixed frequency signal that the outfan of the first frequency mixer is exported；
The feedback end of second phase discriminator is coupled to the outfan of the second frequency mixer to receive the second mixed frequency signal.
Preferably, the frequency tripler is 32 doubler.
Compared with prior art, beneficial effects of the present invention are：By agitator being controlled in first voltage couple preset voltage module, enable first voltage control agitator more quickly starting of oscillation, solve in power up as phase deviation is larger, phase-locked loop modulates the slow problem of stable frequency source, so as to shortening the modulation time by way of preset voltage, so that electric on one, whole device can quickly export stable frequency source.
Description of the drawings
Fig. 1 is the structure principle chart one of numerical frequency source generator embodiment of the present invention；
Fig. 2 is the structure principle chart two of numerical frequency source generator embodiment of the present invention；
Fig. 3 is the frequency conversion schematic diagram of numerical frequency source generator preferred embodiment of the present invention.
1 in figure, doubler handover module；2nd, fractional frequency division synthesis module.
Specific embodiment
It is described further referring to figs. 1 to 3 pairs of numerical frequency source generator embodiments of the present invention.
A kind of numerical frequency source generator, including wave band input and wave band outfan, the wave band input accesses outside source, and phase-locked loop circuit is coupled between the wave band input and wave band outfan, and the phase-locked loop circuit includes first voltage control agitator and the second phase discriminator.Voltage-controlled oscillator (VCO) refers to that output frequency has the oscillating circuit (VCO) of corresponding relation with input control voltage, frequency is the oscillation of a function device VCO of applied signal voltage, the component parameters of the working condition or oscillation circuit of agitator are controlled by input control voltage, so that it may constitute a voltage controlled oscillator.Phase discriminator is the circuit for making the phase contrast between output voltage and two input signals have determination relation.The mathematical model of sinusoidal phase discriminator PD2 is：
Vi (t)=Visin (ω 0t+ θ i (t))
V0 (t)=V0sin (ω 0t+ θ 0 (t))
θ e (t)=θ i (t)-θ 0 (t)
Vd (t)=Kpsin (θ e (t))
Wherein Kp=KmViV0/2, as sinusoidal phase characteristic.When loop is entered to be locked, phase error very little has sin (θ e (t)) ≈ θ e (t).Now, error voltage vd (t) of phase discriminator PD2 outputs is proportional to phase error theta e (t), i.e., linear.
Voltage-controlled oscillator VCO is the device for converting voltages into frequency, and its frequency of oscillation linearly changes with input control voltage, i.e.,：ω v (t)=ω 0+K0vc (t)
Wherein ω v (t) is the instantaneous angular frequency of VCO；ω 0 is the centre frequency of VCO；Voltage-controlled sensitivity of the K0 for voltage-controlled oscillator VCO.
The control characteristic of the voltage-controlled oscillator VCO in practical application only, in limited range of linearity control, surpasses after going beyond the scope, and voltage-controlled sensitivity will decline.Formula above formula both sides are integrated, then Laulace conversion obtains the transmission function of voltage-controlled oscillator VCO and is represented by：
θ e (s)=
K0ve(s)/s
The expression formula has an integrating factor 1/s, and this is that the integral relation between phase place and angular frequency is formed.It is VCO intrinsic that this is integral action, and commonly referred to as voltage-controlled oscillator VCO is the intrinsic integral element in phase-locked loop.This integral action plays considerable effect in the loop.
First voltage controls agitator and the second phase discriminator forms loop, and the first voltage controls oscillator output frequencies source signal, and the first voltage control agitator has been also coupled to preset voltage module, and the preset voltage module includes digital to analog converter and single-chip microcomputer.The digital quantity of parallel binary also known as D/A converter, is converted to DC voltage or DC current, DC voltage is to provide in the present embodiment by digital to analog converter.And single-chip microcomputer is intended merely to provide digital drive signals, digital to analog converter is driven to work to provide analog voltage signal with digital drive signals, which is not made improvements to software section, it is to connect to realize function that its components and parts has itself by existing singlechip equipment and digital to analog converter by wire, the model STC89C51 single-chip microcomputer that single-chip microcomputer is used, as more common single-chip microcomputer its by single-chip microcomputer come drive digital to analog converter realize output DC voltage be prior art, will not be described here its principle, it should be understood that, agitator is controlled for first voltage by the DC voltage that digital to analog converter is exported preset voltage signal is provided, so that phase-locked loop circuit can more quickly starting of oscillation, it is the research and creative combination for prior art.
The single-chip microcomputer is to provide digital drive signals；The digital to analog converter is coupled to single-chip microcomputer to receive digital drive signals and export analog voltage signal；The first voltage control agitator is coupled to digital to analog converter to receive output analog voltage signal to produce original frequency source in advance.So that as phase deviation is larger in power up, it is slow that phase-locked loop modulates stable frequency source, by preset voltage so that shortening the modulation time, solve in power up as phase deviation is larger, phase-locked loop modulates the slow problem of stable frequency source, by preset voltage so that shortening the modulation time so that electricity on, whole device can quickly export stable frequency source.First voltage controls to be also coupled to capacitor between agitator and phase discriminator.Capacitor can eliminate the impact that digital circuit breaker in middle element is exported to frequency source, so that the preset d. c. voltage signal of power up is more stable.
The input of first voltage control agitator has been also coupled to voltage buffer module, and the voltage buffer module is to absorb surge voltage.Voltage buffer module includes electric capacity C in the present embodiment, and which mainly can absorb surge voltage using the pressure stabilization function of electric capacity, and described electric capacity C one end is connected with voltage buffer module, other end ground connection.
Phase-locked loop circuit also includes the first frequency mixer and doubler handover module 1；Doubler handover module 1 is used for the doubler for switching different multiples, and doubler handover module 1 is coupled to wave band input to receive outside source, and output switching frequency-doubled signal；First frequency mixer is coupled between doubler handover module 1 and first voltage control agitator, to receive switching frequency-doubled signal and frequency source signal respectively, and exports the first mixed frequency signal；The first frequency divider is coupled between second phase discriminator and wave band input；First frequency divider is coupled to wave band input to receive outside source, and exports the first fractional frequency signal；The input of the second phase discriminator is coupled to the first frequency divider to receive the first fractional frequency signal, and the feedback end of the second phase discriminator is coupled to the first frequency mixer to receive the first mixed frequency signal, and the outfan of the second phase discriminator is exporting phase discrimination signal；The control end of first voltage control agitator is coupled to the outfan of the second phase discriminator to receive phase discrimination signal and control oscillator output frequencies source to wave band outfan to control first voltage in response to phase discrimination signal.
Being primarily served using the effect of frequency mixer is carried out different frequency signals being mixed superposition or is subtracted each other.α is signal frequency amount, and β is local frequency amount, is produced and difference frequency.Cos α cos β=[cos (alpha+beta)+cos (alpha-beta)]/2, frequency mixer is generally made up of non-linear element and frequency-selective circuit, so band filter of the prior art can be replaced with frequency mixer, the stability of phase-locked loop circuit and PGC demodulation speed in prior art is structurally and functionally improve.
Doubler makes output signal frequency be equal to the circuit of frequency input signal integral multiple, incoming frequency is f1, then output frequency is f0=nf1, and coefficient n is any positive integer, claims frequency multiplication number of times, doubler is of many uses, if transmitter is using after doubler master oscillator can vibrate in lower frequency, to improve frequency stability, frequency modulation equipment increases frequency shift (FS) with doubler, in phase keying communication equipment, doubler is an important composition unit of carrier recovery circuit；Frequency mixer is that output signal frequency is equal to two frequency input signal sums, difference or the circuit for both other combinations, and frequency mixer is generally made up of non-linear element and frequency-selective circuit.
Doubler handover module 1 includes the first switching doubler, the second switching doubler and switching switch；The first switching doubler is the doubler of two frequencys multiplication；Doubler of the second switching doubler for frequency tripling；The switching switch is respectively coupled to the first switching doubler with the second switching doubler for switching over the second switching doubler to the first switching doubler.
Changing switch includes that the stationary contact of the first single-pole double-throw switch (SPDT) K1 and the second single-pole double-throw switch (SPDT) K2, the first single-pole double-throw switch (SPDT) K1 of linkage setting is coupled to wave band input, and the stationary contact of the second single-pole double-throw switch (SPDT) K2 is coupled to the first frequency mixer.
The second frequency mixer is coupled between first frequency mixer and the second phase discriminator, the second frequency divider between the first frequency mixer and wave band input, is coupled with；Second frequency divider is coupled to wave band input to receive outside source, and exports the second fractional frequency signal；Second frequency mixer is coupled to the second frequency divider to receive the second fractional frequency signal, and exports the second mixed frequency signal, and the local oscillations source of the second frequency mixer is provided by the first mixed frequency signal that the outfan of the first frequency mixer is exported；The feedback end of the second phase discriminator is coupled to the outfan of the second frequency mixer to receive the second mixed frequency signal.
The outside source of low-frequency band can be input into by above scheme in wave band input（3225-3275MHz）, the frequency source of high band is then produced from wave band outfan（6-12GHz）.
This frequency source generating means also includes fractional frequency division synthesis module 2, and the fractional frequency division synthesis module 2 includes frequency input, external signal source output terminal, broken number frequency division synthesizer, second voltage control agitator, frequency tripler and three-mixer；Frequency input accesses fixed frequency；The frequency input is coupled to broken number frequency division synthesizer, second voltage control agitator and external signal source output terminal successively；The broken number frequency division synthesizer is to export fractional frequency division signal；The input of the frequency tripler is coupled to frequency input, for receiving outside source and exporting frequency tripling signal；The input of the three-mixer is coupled to the outfan of frequency tripler, and for receiving frequency tripling signal and exporting the 3rd mixed frequency signal, the local oscillations source of the three-mixer is provided by second voltage control agitator；The first phase discriminator has been also coupled between the broken number frequency division synthesizer and second voltage control agitator；The input of first phase discriminator is coupled to the outfan of broken number frequency division synthesizer, for receiving fractional frequency division signal, the feedback end of first phase discriminator is coupled to the outfan of three-mixer to receive the 3rd mixed frequency signal, and the outfan of first phase discriminator is exporting the first phase discrimination signal；The control end of the second voltage control agitator is coupled to the outfan of the first phase discriminator, for receiving the first phase discrimination signal and exporting first oscillator signal to external signal source output terminal to control second voltage control agitator in response to the first phase discrimination signal；External signal source output terminal is coupled to wave band input to provide outside source.
Thus the frequency signal that fixed frequency external signal source output terminal is input into tentatively can be changed by circuit, export the frequency band of intermediate frequency, successively improving the precision of frequency source.It is the outside source that the fixed-frequency source of 100MHz is converted into 3225-3275MHz in the present embodiment.
As shown in Figure 3，The fixed-frequency source that frequency input is accessed is 100Mhz，By the signal source of 100Mhz is input in broken number frequency division synthesizer，Broken number frequency division synthesizer is allowd to export some value in a 25～75Mhz，The value is 0.3 stepping simultaneously，Have three after arithmetic point，And the value is input to the input of the first phase discriminator PD1，The input of frequency tripler is coupled to frequency input so that the signal source of 100 Mhz produces the signal source of 3200Mhz after frequency multiplication，The signal source of the 3200Mhz is being input in three-mixer MIX3，Controlling agitator VCO1 to provide the local oscillations source of three-mixer by second voltage，Local oscillations source is the signal source of 3225～3275Mhz，The feedback signal of 25～75Mhz is exported after subtracting each other by three-mixer MIX3，It is input to the feedback end of the first phase discriminator PD1，By the effect and the calculating by formula 20*logN of the first phase discriminator PD1，N is the fractional frequency division signal of the feedback signal divided by input of feedback end，I.e. when the size of feedback signal is equal with fractional frequency division signal magnitude，The first phase discriminator PD1 output low levels can be caused，Signal source Vi of the corresponding value in first band output exports 3225～3275Mhz of control second voltage control agitator，Such as feedback signal is 25.001Mhz,Fractional frequency division signal is also 25.001Mhz，So that the value of N is 0，I.e. so that control second voltage control agitator exports signal source Vi of 3225.001Mhz in first band output.
The outside source that wave band input is accessed can be certain value in 3225～3275Mhz，The first switching doubler and the second switching doubler are switched over the frequency-doubled signal required for obtaining by the first single-pole double-throw switch (SPDT) K1 and the second single-pole double-throw switch (SPDT) K2，According to be the first switching doubler，As two frequencys multiplication，The local oscillations source of the first frequency mixer MIX1 is provided by first voltage control agitator VCO2 simultaneously，As 6～12Ghz，The signal source of one 5～2200Mhz is produced by the first frequency mixer MIX1，In the local oscillations source using this signal source as the second frequency mixer MIX2，Second frequency mixer MIX2 receives 800～1600Mhz by the second frequency divider，Both produce a 50～500Mhz by the effect of the second frequency mixer MIX2,And it is input to the feedback end of phase discriminator PD2，The input of phase discriminator PD2 receives the signal source of 100Mhz by the first frequency divider，By the effect and the calculating by formula 20*logN of phase discriminator PD2，N is second fractional frequency signal of the feedback signal divided by input of feedback end，I.e. when the size of feedback signal is equal in magnitude with the second fractional frequency signal，Phase discriminator PD2 output low levels can be caused，Control first voltage control agitator VCO exports the signal source of 6～12Ghz in wave band output.
Using fractional frequency division synthesis module 2, digital circuit and phase-locked loop circuit combination, digital circuit is mainly digital to analog converter and single-chip microcomputer, therefore the performance of numerical frequency source generator is greatly improved, cost is greatly reduced and with high reliability.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of numerical frequency source generator, including wave band input and wave band outfan, the wave band input accesses outside source, phase-locked loop circuit is coupled between the wave band input and wave band outfan, the phase-locked loop circuit includes first voltage control agitator and the second phase discriminator, the first voltage control agitator and the second phase discriminator form loop, and the first voltage controls oscillator output frequencies source signal, it is characterised in that：The first voltage control agitator has been also coupled to preset voltage module, and the preset voltage module includes digital to analog converter and single-chip microcomputer；
The single-chip microcomputer is to provide digital drive signals；
The digital to analog converter is coupled to single-chip microcomputer to receive digital drive signals and export analog voltage signal；
The first voltage control agitator is coupled to digital to analog converter to receive analog voltage signal to produce original frequency source in advance.
2. numerical frequency source generator according to claim 1, it is characterised in that：The input of the first voltage control agitator has been also coupled to voltage buffer module, and the voltage buffer module is to absorb surge voltage.
3. numerical frequency source generator according to claim 2, it is characterised in that：The voltage buffer module includes electric capacity, and described electric capacity one end is connected with voltage buffer module, other end ground connection.
4. numerical frequency source generator according to claim 2, it is characterised in that：The phase-locked loop circuit also includes the first frequency mixer and doubler handover module；
The doubler handover module is used for the doubler for switching different multiples,
The doubler handover module is coupled to wave band input to receive outside source, and output switching frequency-doubled signal；
First frequency mixer is coupled between doubler handover module and first voltage control agitator, to receive switching frequency-doubled signal and frequency source signal respectively, and exports the first mixed frequency signal；
The first frequency divider is coupled between second phase discriminator and wave band input；
First frequency divider is coupled to wave band input to receive outside source, and exports the first fractional frequency signal；
The input of second phase discriminator is coupled to the first frequency divider to receive the first fractional frequency signal, and the feedback end of second phase discriminator is coupled to the first frequency mixer to receive the first mixed frequency signal, and the outfan of second phase discriminator is exporting phase discrimination signal；
The control end of the first voltage control agitator is coupled to the outfan of the second phase discriminator to receive phase discrimination signal and control oscillator output frequencies source to wave band outfan to control first voltage in response to phase discrimination signal.
5. a kind of frequency source generating meanss according to claim 3, is characterized in that：The frequency source generating meanss also include fractional frequency division synthesis module, and the fractional frequency division synthesis module includes frequency input, external signal source output terminal, broken number frequency division synthesizer, second voltage control agitator, frequency tripler and three-mixer；
The frequency input accesses fixed frequency；
The frequency input is coupled to broken number frequency division synthesizer, second voltage control agitator and external signal source output terminal successively；
The broken number frequency division synthesizer is to export fractional frequency division signal；
The input of the frequency tripler is coupled to frequency input, for receiving outside source and exporting frequency tripling signal；
The input of the three-mixer is coupled to the outfan of frequency tripler, and for receiving frequency tripling signal and exporting the 3rd mixed frequency signal, the local oscillations source of the three-mixer is provided by second voltage control agitator；
The first phase discriminator has been also coupled between the broken number frequency division synthesizer and second voltage control agitator；
The input of first phase discriminator is coupled to the outfan of broken number frequency division synthesizer, for receiving fractional frequency division signal, the feedback end of first phase discriminator is coupled to the outfan of three-mixer to receive the 3rd mixed frequency signal, and the outfan of first phase discriminator is exporting the first phase discrimination signal；
The control end of the second voltage control agitator is coupled to the outfan of the first phase discriminator, for receiving the first phase discrimination signal and exporting first oscillator signal to external signal source output terminal to control second voltage control agitator in response to the first phase discrimination signal；
External signal source output terminal is coupled to wave band input to provide outside source.
6. a kind of frequency source generating meanss according to claim 3, is characterized in that：The doubler handover module includes the first switching doubler, the second switching doubler and switching switch；
The first switching doubler is the doubler of two frequencys multiplication；
Doubler of the second switching doubler for frequency tripling；
The switching switch is respectively coupled to the first switching doubler with the second switching doubler for switching over the second switching doubler to the first switching doubler.
7. numerical frequency source generator according to claim 6, it is characterised in that：The switching switch includes first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT) of linkage setting, and the stationary contact of first single-pole double-throw switch (SPDT) is coupled to wave band input, and the stationary contact of second single-pole double-throw switch (SPDT) is coupled to the first frequency mixer.
8. the numerical frequency source generator according to claim 3 or 4 or 5 or 6, it is characterised in that：The second frequency mixer is coupled between first frequency mixer and the second phase discriminator, between first frequency mixer and wave band input, the second frequency divider is coupled with；
Second frequency divider is coupled to wave band input to receive outside source, and exports the second fractional frequency signal；
Second frequency mixer is coupled to the second frequency divider to receive the second fractional frequency signal, and exports the second mixed frequency signal, and the local oscillations source of second frequency mixer is provided by the first mixed frequency signal that the outfan of the first frequency mixer is exported；
The feedback end of second phase discriminator is coupled to the outfan of the second frequency mixer to receive the second mixed frequency signal.
9. numerical frequency source generator according to claim 4, it is characterised in that：The frequency tripler is 32 doubler.
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| CN201510640468.1A CN106559075B (en) | 2015-09-30 | 2015-09-30 | Numerical frequency source generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138383A (en) * | 2018-02-09 | 2019-08-16 | 海能达通信股份有限公司 | Frequency generating circuit |
| CN111431554A (en) * | 2020-03-27 | 2020-07-17 | 深圳清华大学研究院 | Transmitter and wireless transceiver having the same |
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| CN2438274Y (en) * | 2000-08-22 | 2001-07-04 | 信息产业部电子第五十四研究所 | Digital direct frequency synthesis and phase-locked loop type frequency-hopping frequency synthesizer |
| KR20060002110A (en) * | 2004-07-01 | 2006-01-09 | 유흥균 | Frequency synthesizer having the ultra-fast switching characteristic |
| CN102751983A (en) * | 2012-07-30 | 2012-10-24 | 中国电子科技集团公司第四十一研究所 | Multi-loop synthesized local oscillation device of TD-LTE (time division-long term evolution) comprehensive test instrument |
| CN203086442U (en) * | 2012-12-31 | 2013-07-24 | 四川九洲电器集团有限责任公司 | Phase-locked fast frequency hopping source based on adder |
| CN205051679U (en) * | 2015-09-30 | 2016-02-24 | 中星联华科技（北京）有限公司 | Frequency source generator |
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| CN2438274Y (en) * | 2000-08-22 | 2001-07-04 | 信息产业部电子第五十四研究所 | Digital direct frequency synthesis and phase-locked loop type frequency-hopping frequency synthesizer |
| KR20060002110A (en) * | 2004-07-01 | 2006-01-09 | 유흥균 | Frequency synthesizer having the ultra-fast switching characteristic |
| CN102751983A (en) * | 2012-07-30 | 2012-10-24 | 中国电子科技集团公司第四十一研究所 | Multi-loop synthesized local oscillation device of TD-LTE (time division-long term evolution) comprehensive test instrument |
| CN203086442U (en) * | 2012-12-31 | 2013-07-24 | 四川九洲电器集团有限责任公司 | Phase-locked fast frequency hopping source based on adder |
| CN205051679U (en) * | 2015-09-30 | 2016-02-24 | 中星联华科技（北京）有限公司 | Frequency source generator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138383A (en) * | 2018-02-09 | 2019-08-16 | 海能达通信股份有限公司 | Frequency generating circuit |
| CN110138383B (en) * | 2018-02-09 | 2023-09-05 | 海能达通信股份有限公司 | Frequency generation circuit |
| CN111431554A (en) * | 2020-03-27 | 2020-07-17 | 深圳清华大学研究院 | Transmitter and wireless transceiver having the same |
| CN111431554B (en) * | 2020-03-27 | 2021-11-09 | 深圳清华大学研究院 | Transmitter and wireless transceiver having the same |
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