CN104702276B - A kind of quick lock in microwave frequency source circuit and equipment - Google Patents
A kind of quick lock in microwave frequency source circuit and equipment Download PDFInfo
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- CN104702276B CN104702276B CN201510151731.0A CN201510151731A CN104702276B CN 104702276 B CN104702276 B CN 104702276B CN 201510151731 A CN201510151731 A CN 201510151731A CN 104702276 B CN104702276 B CN 104702276B
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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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Abstract
The present invention relates to the communications field, a kind of quick lock in microwave frequency source circuit and equipment are referred specifically to；Including：Sampling Phase Discriminator, loop filter, prewired circuit module, frequency divider and voltage controlled oscillator；Wherein described Sampling Phase Discriminator is connected with one end of the loop filter, the other end of the loop filter is connected with the prewired circuit module, the other end of the prewired circuit module is connected with the voltage controlled oscillator, and the voltage controlled oscillator is connected by frequency divider with the Sampling Phase Discriminator.By adjusting the preset change condition to adjust original F1 Frequency Lockings voltage V01 to target frequency F2 VT V02；VT during this in circuit remains constant, so that the charging interval to electric capacity is zero, reduces Hopping time, directly solves the frequency hopping expense brought in existing scheme due to the capacitor charging time of loop filter.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of quick lock in microwave frequency source circuit and equipment.
Background technology
With the development of electronic equipment, electronic system proposes more and more high requirement to frequency source, passes through Phase Lock Technique
The microlock frequency source technology for obtaining high-quality microwave frequency comprehensive generator is also greatly developed.
Phaselocked loop (PLL) is as shown in Figure 1：Including phase discriminator (PD), loop filter (LF), voltage controlled oscillator (VCO), mirror
Phase device (PD) is compared the phase and the phase of voltage controlled oscillator (VCO) signal of reference-input signal (XTAL), by phase demodulation
The phase error of the two input signals is converted to error voltage by device (PD), the voltage by loop filter filter after as pressure
The control voltage of controlled oscillator (VCO), control voltage changes the output frequency of voltage controlled oscillator (VCO), when closed-loop system is stable
Afterwards, the output frequency of voltage controlled oscillator (VCO) is to reach required frequency, completes the locking of output frequency and reference frequency.
When output frequency is higher than reference frequency, typically also need in feedback branch increase frequency divider (N) so that be input to PD two-way
Signal frequency is roughly equal.Equally, reference signal can also use a frequency divider (R), to obtain less phase demodulation frequency.
In all technical indicators of microwave frequency synthesizer, phase noise (Phase noise) and Hopping time are two
The index of item core.Wherein, Hopping time refers to that frequency synthesizer transforms to another output frequency institute from an output frequency
The conversion time needed.It is, in general, that the performance of the shorter microwave frequency device of Hopping time is better：The short microwave of frequency modulated time
Frequency device has very big application space in fields such as radar, frequency hopping communication, electronic countermeasures, by the frequency modulation of microwave frequency device
Time shortening is the direction that professional and technical personnel in the field make great efforts research always.
The factor of influence Hopping time has a lot, and current Hopping time most fast frequency source framework is Direct frequency synthesizer
(DDS), but Direct frequency synthesizer (DDS) also has the shortcomings that itself, such as：Framework is complicated, bulky, spuious high, these
Shortcoming limits its extensive use in frequency source domain.Using phaselocked loop framework frequency synthesizer, due to it is simple in construction,
The advantages of small volume, cost be low, mutually noisy scattered index is good, is still to use most frequency synthesizer frameworks at present.
In phaselocked loop framework, Hopping time be difficult have accurately formula can express, typically provide empirical equation：
Wherein, LT is Hopping time, and Fc is loop bandwidth, and Ft is frequency tolerance, that is, the difference frequency with target frequency,
Everybody approve frequency difference in the range of, that is, assert frequency source oneself through being in the lock state.Fj is jump frequency, i.e., such as jumped to from F1
Target frequency F2, then Fj=F2-F1.
From above-mentioned formula, if in the case where Ft keeps certain, to reduce LT for the value of Hopping time, it is necessary to the greatest extent
Small jump frequency is measured, as far as possible big loop bandwidth.Therefore, people employ many methods to make great efforts to solve in terms of the two
The Hopping time in frequency of phase locking source.In terms of loop bandwidth is improved, employ variable loop bandwidth to take into account Hopping time and lock
The contradiction for index of mutually being made an uproar after fixed.In terms of Hopping frequencies are reduced, the mesh of the preset voltage controlled oscillator of preset voltage (VCO) is employed
Frequency is marked, its output frequency is approached final locking frequency so that phaselocked loop is in quick pull-in range, reduces locking time.
Existing technical scheme is mainly using voltage controlled oscillator (VCO) auxiliary tuning circuit, its main work
Principle can be as shown in Figure 2.Its main operational principle is to first pass through the target frequency information that oneself knows, with reference to voltage controlled oscillator
(VCO) characteristic, calculates VT substantially, and voltage controlled oscillator is added in by voltage controlled oscillator (VCO) broad tuning circuit
(VCO) section is tuned so that near voltage controlled oscillator (VCO) fast preset to target frequency, circuit is then switched to lock phase again
Loop circuit, reaches the day of reduction frequency hopping frequency difference, reduces Hopping time.
The shortcoming of such scheme mainly when phase lock loop locks, the VT VT of voltage controlled oscillator (VCO) with it is voltage-controlled
The frequency of output is corresponding required for oscillator (VCO)；I.e. when frequency of phase locking source needs to jump to F2 from F1, then F1 is corresponding
VT VT1 will also change to the corresponding VT VT2 of F2；Jump is reduced by outside preset voltage in existing scheme
Frequency, but VT from the VT1 processes for changing to VT2 be also to need certain time.Reason is that phase discriminator driving tuning is electric
The change of pressure is to be completed by phase detector charge pump electric current to the capacitor charge and discharge in loop filter, the discharge and recharge of this electric capacity
Time (about in uS magnitudes) is unavoidable in existing scheme, and major part is also accounted in Hopping time.
The content of the invention
It is an object of the invention to overcome in the presence of prior art above-mentioned not enough there is provided a kind of quick lock in Microwave Frequency
Rate source circuit and equipment, on the basis of existing technology by the way that prewired circuit module is arranged at into loop filter and VCO
Between device, to solve in existing preset scheme because VT VT changes the charging interval expense brought, further reduce lock
The frequency hopping locking time in the comprehensive source of phase frequency.
In order to realize foregoing invention purpose, the present invention provides following inventive technique scheme：A kind of quick lock in microwave frequency
Source circuit, including：Sampling Phase Discriminator, loop filter, prewired circuit module, frequency divider and voltage controlled oscillator；It is wherein described
Sampling Phase Discriminator is connected with one end of the loop filter, the other end of the loop filter and the prewired circuit module
Be connected, the other end of the prewired circuit module is connected with the voltage controlled oscillator, the voltage controlled oscillator by frequency divider and
The Sampling Phase Discriminator is connected.
During work, the Sampling Phase Discriminator will be sent the phase information and the VCO of signal by reference source REF
The phase information of device signal is compared, and the phase error of the two signals is converted into error voltage, the error voltage by
After loop filter filtering in input prewired circuit module, the prewired circuit module adjusts accordingly the voltage of input
Afterwards, as the control voltage of voltage controlled oscillator, the voltage controlled oscillator changes its output frequency according to control voltage, when closed loop system
After system is stable, the output frequency of the voltage controlled oscillator is to reach required frequency, completes output frequency and reference frequency
Locking.Prewired circuit is placed into loop by the present invention compared to prior art, and preset original frequency F1 is adjusted by adjusting
Latch voltage V01 to target frequency F2 VT V02 change condition；VT during this in circuit, i.e. electric charge
Pump voltage but remains constant, so that the charging interval to electric capacity is zero, directly solves charging interval band in existing scheme
The frequency hopping expense come, reduces Hopping time.
As a kind of excellent side, the prewired circuit module, including digital analog converter and resistance.The digital analog converter it is defeated
Enter the end connection loop filter, the output end of the digital analog converter is connected with resistance；The other end of the resistance and institute
Voltage controlled oscillator is stated to be connected；The resistance can play partial pressure and protective effect so that the work of system is more stablized.
Further, carried out by the data to the digital analog converter preset；To adjust original frequency F1 locking electricity
Press V01 to target frequency F2 VT V02 change condition；The correspondence of frequency hopping is adjusted and controlled by digital analog converter
Control voltage, the advantage such as control method simple short with the response time.
Further, the digital analog converter is parallel port digital analog converter, and the transmission speed of parallel port digital analog converter is fast, has
Beneficial to shortening Hopping time；By the parallel control port for setting the digital analog converter：D11~D15, it is described preset to determine
The output voltage V0 of circuit module magnitude of voltage.
If lock phase frequency is comprehensive be locked in F1 frequencies when VT be V01, due to the effect of digital analog converter so that
The wired sexual intercourse of VT and V01：
V01==A*VT
Wherein, A is the control coefrficient of digital analog converter, is determined by setting data D11~D15 of digital analog converter, A value
For the Arbitrary Digit between 0~l.
When needing frequency source jumping to F2 by F1, the VT of VCO correspondence F2 frequencies is V02.Now, due to number
The effect of weighted-voltage D/A converter, VT and V02 still has holding linear relationship：
V02==B*VT
Wherein, B is the control coefrficient of digital analog converter, and its value is the Arbitrary Digit between 0~l, by setting for digital analog converter
Data D11~D15 is put to determine.
Therefore, it can thus be concluded that arriving, it is constant for keeping VT, then
B=(A*V02)/V01
So, it is only necessary to set setting value D11~D15 of new digital analog converter so that B meet formula B=(A*V02)/
V01 relation, it is possible to ensure that charge pump voltage VT is constant.
Further, the arranges value of the digital analog converter control port D11~D15 passes through control module, control module
In the frequency that redirects as needed of process chip (such as, the control chip such as FPGA or MCU) calculate B value, and turn
2 carry system codes are turned to, send this code to control the output valve of digital analog converter by parallel port, to realize logarithm weighted-voltage D/A converter
Setting.
As a preferred embodiment, the prewired circuit module is：Switched resistor network module；By existing in switched resistor network
Realize in the case of Vin voltages are immovable, the different voltages for completing V0 VTs are preset；Pass through the defeated of switched resistor network
Go out voltage regulation capability, come the latch voltage V01 to target frequency F2 that adjusts original frequency F1 VT V02 change bar
Part.
Further, the present invention provides a kind of quick lock in microwave frequency source device, and the equipment includes above-mentioned fast lock
Determine microwave frequency source circuit, the frequency modulated time for being compared to microwave frequency source device of the prior art is shorter, and performance is more excellent
More.
Compared with prior art, beneficial effects of the present invention：The present invention provides a kind of quick lock in microwave frequency source circuit
And equipment, wherein the quick lock in microwave frequency source circuit, including：Sampling Phase Discriminator, loop filter, prewired circuit mould
Block, frequency divider and voltage controlled oscillator；Wherein described Sampling Phase Discriminator is connected with one end of the loop filter, the loop
The other end of wave filter is connected with the prewired circuit module, the other end and the voltage controlled oscillator of the prewired circuit module
It is connected, the voltage controlled oscillator is connected by frequency divider with the Sampling Phase Discriminator.Compared to prior art used it is auxiliary
Tuning circuit is helped, prewired circuit is placed into loop, preset original frequency F1 latch voltages V01 is adjusted to mesh by adjusting
Mark frequency F2 VT V02 change condition：VT during this in circuit, i.e. charge pump voltage but remain permanent
It is fixed, so that the capacitor charging time to the loop filter is zero, due to not having the charge pump charging interval, no matter Hopping frequencies
The size of change, can keep a small locking time.The frequency hopping that the charging interval in existing scheme brings directly is solved to open
Pin, reduces Hopping time.
Brief description of the drawings：
Fig. 1 is phase-locked loop circuit structure in the prior art.
Fig. 2 is Microwave Frequency Source electrical block diagram in the prior art of the invention.
Fig. 3 is a kind of quick lock in Microwave Frequency Source circuit modular structure schematic diagram of the invention.
Fig. 4 is a kind of quick lock in Microwave Frequency Source electrical block diagram of the invention.
Fig. 5 is a kind of quick lock in Microwave Frequency Source Measurement of Hopping Time schematic diagram of the invention.
Fig. 6 is the structural representation of the prewired circuit of switched resistor network.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of above-mentioned theme of the invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
The present invention provides a kind of quick lock in microwave frequency source circuit and equipment, on the basis of existing technology by solving
Because VT VT changes the charging interval expense brought in existing preset scheme, further reduce the frequency hopping in the comprehensive source of lock phase frequency
Locking time.
In order to realize foregoing invention purpose, the present invention provides following inventive technique scheme：A kind of quick lock in as shown in Figure 3
Microwave frequency source circuit, including：Sampling Phase Discriminator PD, loop filter LF, prewired circuit module, frequency divider 1/N and voltage-controlled
Oscillator VCO；Wherein described Sampling Phase Discriminator PD is connected with one end of the loop filter LF, the loop filter LF's
The other end is connected with the prewired circuit module, and the other end of the prewired circuit module is connected with the voltage controlled oscillator VCO,
The voltage controlled oscillator VCO is connected by frequency divider 1/N with the Sampling Phase Discriminator PD.
During work, the Sampling Phase Discriminator will be sent the phase information and the VCO of signal by reference source REF
The phase information of device signal is compared, and the phase error of the two signals is converted into error voltage, the error voltage by
After loop filter filter, ripple in input prewired circuit module, the prewired circuit module adjusts accordingly the voltage of input
Afterwards, as the control voltage of voltage controlled oscillator, the voltage controlled oscillator changes its output frequency according to control voltage, when closed loop system
After system is stable, the output frequency of the voltage controlled oscillator is to reach required frequency, completes output frequency and reference frequency
Locking.In the present invention, compared to prior art, prewired circuit is placed into loop, preset original frequency is adjusted by adjusting
Rate F1 latch voltage V01 to target frequency F2 VT V02 change condition：VT during this in circuit, i.e.,
Charge pump voltage but remains constant, so that the charging interval to electric capacity is zero, directly solves when being charged in existing scheme
Between the frequency hopping expense brought, reduce Hopping time.
It is preferred that, as shown in figure 4, the prewired circuit module, including digital analog converter and resistance.The digital analog converter
Input connect the loop filter, the output end of the digital analog converter is connected with resistance；The other end of the resistance
It is connected with the voltage controlled oscillator.
Further, carried out by the data to the digital analog converter preset；To adjust original frequency F1 locking electricity
Press V01 to target frequency F2 VT V02 change condition.
Further, the digital analog converter is parallel port digital analog converter, by setting the parallel of the digital analog converter
Control port：D11~D15, come the output voltage V0 that determines prewired circuit module magnitude of voltage.
If lock phase frequency is comprehensive be locked in F1 frequencies when VT be V01, due to the effect of digital analog converter so that
The wired sexual intercourse of VT and V01：
V01==A*VT
Wherein, A is the Arbitrary Digit between 0~l, is determined by setting data D11~D15 of digital analog converter.
When needing frequency source jumping to F2 by F1, the VT of VCO correspondence F2 frequencies is V02.Now, due to number
The effect of weighted-voltage D/A converter, VT and V02 still has holding linear relationship：
V02==B*VT
Wherein, B is the Arbitrary Digit between 0~l, is determined by setting data D11~D15 of digital analog converter.
Therefore, it can thus be concluded that arriving, it is constant for keeping VT, then
B=(A*V02)/V01
So, it is only necessary to set setting value D11~D15 of new digital analog converter so that B meet formula B=(A*V02)/
V01 relation, it is possible to ensure that charge pump voltage VT is constant.
Further, the arranges value of the digital analog converter control port D11~D15, by control module (such as
MCU) realize.The Hopping time realized by experimental test using circuit arrangement of the present invention is as shown in Figure 5：Hopping time contracts
It is small to arrive 1.17uS, it is the optimal Hopping time of current phaselocked loop framework frequency source.
It is preferred that, the prewired circuit module is：Switched resistor network module；By being realized in switched resistor network
In the case of VT voltages are immovable, the different voltages for completing V0 VTs are preset；Pass through the output voltage of switched resistor network
Regulating power, come the latch voltage V01 to target frequency F2 that adjusts original frequency F1 VT V02 change condition.
Switched resistor network is as shown in fig. 6, be typically chosen R=50K Ω, and Rl is VCO equivalent input impedance, about M
Ω magnitudes.
The output voltage V0 of the switched resistor network is：
Wherein, D represents the state each switched, if during switch connection VT, D=l, if during switch connection ground, D=0.
Control is switched on-off by difference, the circuit can realize that voltage steps are：Voltage-regulation.
It is come the initialization process for carrying out the control voltage of the voltage controlled oscillator of target frequency by switched resistor network：By controlling
Device module processed calculates the control voltage V02 of the corresponding voltage controlled oscillator of target frequency；Controller module controlling switch resistance net
Network makes its output voltage be V02, is achieved in that in the case of VT voltages are immovable, and the different voltages for completing V0 VTs are pre-
Put.
Further, the present invention provides a kind of quick lock in microwave frequency source device, and the equipment includes above-mentioned fast lock
Determine microwave frequency source circuit, the frequency modulated time for being compared to microwave frequency source device of the prior art is shorter, and performance is more excellent
More.
In a word, the present invention provides a kind of quick lock in microwave frequency source circuit and equipment, leads on the basis of existing technology
Cross and prewired circuit module is arranged between loop filter and voltage controlled oscillator, to solve in existing preset scheme due to tuning
The charging interval expense that voltage VT changes are brought, further reduces the frequency hopping locking time in the comprehensive source of lock phase frequency.It is wherein described quick
Microwave frequency source circuit is locked, including：Sampling Phase Discriminator, loop filter, prewired circuit module, frequency divider and VCO
Device；Wherein described Sampling Phase Discriminator is connected with one end of the loop filter, the other end of the loop filter with it is described
Prewired circuit module is connected, and the other end of the prewired circuit module is connected with the voltage controlled oscillator, the voltage controlled oscillator
It is connected by frequency divider with the Sampling Phase Discriminator.Compared to the auxiliary tuning circuit used of prior art, by preset electricity
Road is placed into loop, by adjusting the preset tuning electricity to adjust original frequency F1 latch voltage V01 to target frequency F2
Press V02 change condition：VT during this in circuit, i.e. charge pump voltage but remain constant, so as to electric capacity
Charging interval is zero, due to not having the charge pump charging interval, no matter the size of Hopping frequencies change, can keep a small lock
Fix time, the Hopping time realized by experimental test using circuit arrangement of the present invention narrows down to 1.17uS, be current lock phase
The optimal Hopping time of ring stand structure frequency source.
Claims (7)
1. a kind of quick lock in microwave frequency source circuit, it is characterized in that：Prewired circuit module is located at loop filter and voltage-controlled shaken
Swing between device；
After the loop filter filters error voltage, in input prewired circuit module, the prewired circuit module will be inputted
Voltage adjust accordingly after, as the control voltage of voltage controlled oscillator, the voltage controlled oscillator changes according to control voltage
Its output frequency, after closed-loop system is stable, the output frequency of the voltage controlled oscillator is to reach required frequency, is completed defeated
Go out the locking of frequency and reference frequency；
The prewired circuit module includes digital analog converter and resistance, and the input of the digital analog converter connects the loop filter
Ripple device, the output end of the digital analog converter is connected with resistance；The other end of the resistance is connected with the voltage controlled oscillator.
2. quick lock in microwave frequency source circuit as claimed in claim 1, it is characterized in that：By to the digital analog converter
Data carry out it is preset, come the latch voltage V01 to target frequency F2 that adjusts original frequency F1 VT V02 change bar
Part.
3. quick lock in microwave frequency source circuit as claimed in claim 2, it is characterized in that：The digital analog converter is parallel port number
Weighted-voltage D/A converter, by setting the parallel control port data of the digital analog converter, to determine the defeated of the prewired circuit module
Go out voltage V0 magnitude of voltage.
4. quick lock in microwave frequency source circuit as claimed in claim 3, it is characterized in that：The digital analog converter control port
The preset of D11~D15 is realized by control module.
5. quick lock in microwave frequency source circuit as claimed in claim 4, it is characterized in that：The control module include FPGA or
Person's MCU process chips.
6. a kind of quick lock in microwave frequency source circuit, it is characterized in that：Prewired circuit module is located at loop filter and voltage-controlled shaken
Swing between device；
After the loop filter filters error voltage, in input prewired circuit module, the prewired circuit module will be inputted
Voltage adjust accordingly after, as the control voltage of voltage controlled oscillator, the voltage controlled oscillator changes according to control voltage
Its output frequency, after closed-loop system is stable, the output frequency of the voltage controlled oscillator is to reach required frequency, is completed defeated
Go out the locking of frequency and reference frequency；The prewired circuit module is switched resistor network.
7. a kind of quick lock in microwave frequency source device, it is characterized in that：Including the fast lock as described in one of claim 1 to 6
Determine microwave frequency source circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510151731.0A CN104702276B (en) | 2015-04-01 | 2015-04-01 | A kind of quick lock in microwave frequency source circuit and equipment |
| PCT/CN2015/091515 WO2016155278A1 (en) | 2015-04-01 | 2015-10-09 | Circuit and equipment for quickly locking microwave frequency source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510151731.0A CN104702276B (en) | 2015-04-01 | 2015-04-01 | A kind of quick lock in microwave frequency source circuit and equipment |
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| Publication Number | Publication Date |
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| CN104702276A CN104702276A (en) | 2015-06-10 |
| CN104702276B true CN104702276B (en) | 2017-11-03 |
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| CN201510151731.0A Active CN104702276B (en) | 2015-04-01 | 2015-04-01 | A kind of quick lock in microwave frequency source circuit and equipment |
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| CN104702276B (en) * | 2015-04-01 | 2017-11-03 | 成都西蒙电子技术有限公司 | A kind of quick lock in microwave frequency source circuit and equipment |
| CN105141309B (en) * | 2015-09-24 | 2017-11-14 | 山东大学 | A kind of phase locked loop fast lock circuit and its operation method for frequency hopping communications |
| CN116405058B (en) * | 2023-06-09 | 2023-09-29 | 中星联华科技（北京）有限公司 | Fast frequency hopping locking circuit and operation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102405597A (en) * | 2009-04-26 | 2012-04-04 | 高通股份有限公司 | Supply-regulated phase-locked loop (pll) and method of using |
| CN204442345U (en) * | 2015-04-01 | 2015-07-01 | 成都西蒙电子技术有限公司 | A kind of quick lock in Microwave Frequency Source phase lock circuitry and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3185735B2 (en) * | 1997-12-08 | 2001-07-11 | 日本電気株式会社 | PLL circuit |
| US20090146704A1 (en) * | 2007-12-05 | 2009-06-11 | Chih-Haur Huang | Delay locked loop circuit and method for eliminating jitter and offset therein |
| CN101841329A (en) * | 2010-06-12 | 2010-09-22 | 中兴通讯股份有限公司 | Phase-locked loop, and voltage-controlled device and method |
| CN104702276B (en) * | 2015-04-01 | 2017-11-03 | 成都西蒙电子技术有限公司 | A kind of quick lock in microwave frequency source circuit and equipment |
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2015
- 2015-04-01 CN CN201510151731.0A patent/CN104702276B/en active Active
- 2015-10-09 WO PCT/CN2015/091515 patent/WO2016155278A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102405597A (en) * | 2009-04-26 | 2012-04-04 | 高通股份有限公司 | Supply-regulated phase-locked loop (pll) and method of using |
| CN204442345U (en) * | 2015-04-01 | 2015-07-01 | 成都西蒙电子技术有限公司 | A kind of quick lock in Microwave Frequency Source phase lock circuitry and equipment |
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| Publication number | Publication date |
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| CN104702276A (en) | 2015-06-10 |
| WO2016155278A1 (en) | 2016-10-06 |
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