CN106059572A - Frequency source module of adjusting frequency output based on programmable control circuit - Google Patents
Frequency source module of adjusting frequency output based on programmable control circuit Download PDFInfo
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- CN106059572A CN106059572A CN201610344262.9A CN201610344262A CN106059572A CN 106059572 A CN106059572 A CN 106059572A CN 201610344262 A CN201610344262 A CN 201610344262A CN 106059572 A CN106059572 A CN 106059572A
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- frequency
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- source module
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- loop
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- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000013461 design Methods 0.000 claims description 9
- 230000004899 motility Effects 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000009125 negative feedback regulation Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000004886 process control Methods 0.000 claims 1
- 238000012827 research and development Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
-
- 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
-
- 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
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
- H03L7/193—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider
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- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention relates to a frequency source module of adjusting frequency output based on a programmable control circuit, comprising a phase locked loop (PLL) loop, a control module, a power switching circuit and a backboard connector. The phase locked loop (PLL) loop comprises a phase frequency detector (PFD), a voltage controlled oscillator (VCO), an R frequency divider, an N frequency divider and a loop filter (LF). The control module adjusts the R frequency divider and the N frequency divider of the PLL loop, and the frequency dividing ratio of the VCO, and also adjusts the output frequency and output power of a frequency source module; the power switching circuit converts the supply voltage provided by the backboard into a supply voltage required by the PLL loop and the control module. The frequency source module has high and adjustable output frequency, and can control programming according to requirements, allowing more flexible output frequency points; the frequency source module can connect with the backboard, and provide reference signals for other modules on the backboard; meanwhile, the frequency source module can connect with other modules according to requirements to form systems of different functions, and have the advantages of high flexibility, low research and development cost, etc.
Description
Technical field
The present invention is a kind of frequency source module using PHASE-LOCKED LOOP PLL TECHNIQUE to design, by introducing programmable external control electricity
Road controls the frequency dividing ratio of phaselocked loop, output frequency and power, it is achieved export adjustable function.And it is possible to by relevant
Adapter and backboard realize interconnection.Belong to electronic circuit field.
Background technology
Frequency source is requisite part in electronic equipment, and it provides reference signal to other circuit or system, is
Important signal source.Frequency source generally use high accuracy, high stability crystal oscillator as reference signal, by different frequencies
Synthesis mode synthesizes required frequency.Frequency synthesis technique is summed up mainly four kinds, is Direct Digital Frequency Synthesizer Technology respectively
(DS), PLL frequency synthesis technique (PLL), direct digital frequency synthesis technology (DDS) and hybrid frequency synthesis skill
Art (DDS+PLL).
Gradually trend towards miniaturization, complication along with Circuits System, traditional circuit design occur in that research and development time length, can
The limitation such as transplantability is poor, motility is low.And the frequency source multi output in present stage circuit fixes the signal of frequency and power,
Want, with demand change output frequency or power, there is certain difficulty.
Summary of the invention
The technology of the present invention solves problem: overcome the deficiencies in the prior art, it is provided that this one is adjusted based on programmable control circuit
The frequency source module of joint rate-adaptive pacemaker, has output frequency high, and output frequency is adjustable, can be programmed controlling according to needs,
Make to export frequency more flexible；And output is high；Can interconnect with backboard, provide benchmark letter for other modules on backboard
Number；The system of difference in functionality can be overlapped to form according to demand and other modules, there is the features such as motility is high, R&D costs are low.
The technology of the present invention solution: a kind of frequency source module based on the output of programmable control circuit regulating frequency, bag
Include: phase-locked loop, control module, power-switching circuit and back panel connector；
Described phase-locked loop includes phase discriminator (PFD), voltage controlled oscillator (VCO), R frequency divider, Fractional-N frequency device and loop
Wave filter (LF)；Enter after R frequency divider from the reference signal of crystal oscillator output, frequency become before R/mono-, be re-fed into mirror
Phase device；Phase discriminator by reference signal with through voltage controlled oscillator output again through Fractional-N frequency device divide after signal carry out phase bit comparison
Rear output current signal, the average of current signal exports again after Fractional-N frequency device divides with reference signal with through voltage controlled oscillator
Signal between the phase contrast of two signals be directly proportional, send into loop filter；Signal in loop filter after integration
Form integral voltage, send into voltage controlled oscillator；The output frequency of voltage controlled oscillator is directly proportional to integral voltage, output signal warp again
Cross Fractional-N frequency device, frequency become before N/mono-, compare in phase discriminator with reference input；Whole loop is one and bears
Feedback regulation, two input signal phase differences being finally reached phase discriminator are almost equal, thus reach lock-out state；After locking
Signal is through frequency dividing in voltage controlled oscillator, and frequency exports after becoming D/mono-.
Control module, phaselocked loop R frequency divider, Fractional-N frequency device and the frequency dividing ratio of voltage controlled oscillator of regulation phase-locked loop, from
And the output frequency of regulating frequency source module, simultaneously also by control module regulating frequency source module output；
Power-switching circuit and back panel connector, the supply voltage that backboard provides is converted into phaselocked loop by power-switching circuit
Supply voltage needed for loop and control module, can be different from other functional module composition functions of backboard by back panel connector
Electronic system, thus simplify electronic system design difficulty, strengthen motility.
Described control module mainly includes single-chip microcomputer and peripheral circuit thereof.By to R frequency divider, Fractional-N frequency device in phaselocked loop
It is programmed control break frequency dividing ratio with voltage controlled oscillator, thus the output frequency of regulating frequency source module.By shaking to voltage-controlled
Swing device and be programmed its output of control break, thus the output that regulating frequency source module is overall.
The adjusting range of frequency dividing ratio R of described R frequency divider is 1 to 4095, the adjusting range of frequency dividing ratio N of Fractional-N frequency device
It is 12 to 262143, makes f by the value adjusting N and RVCO=fOSC* N/R is in voltage controlled oscillator allowed band.VCO
The adjusting range of frequency dividing ratio D of device is 1 to 63, and output signal frequency is fOUT=fVCO/D.Made by the value adjusting R, N and D
Frequency source module output signal frequency reaches frequency needed for system.Described fOSCFor crystal oscillator frequency, fVCOFor voltage controlled oscillator frequency
Rate, fOUTFor frequency source module output frequency.
Present invention advantage compared with prior art is:
(1) output signal frequency and power adjustable, is adapted to the requirement of different electronic system, and only need to be by controlling mould
Block regulates, simple and convenient.
(2) circuit modular, can realize different from difference in functionality module combination in any by back panel connector and backboard
Function, has the highest motility, reduces design cost.
(3) present invention uses phase-locked loop, is based on Automatic Control Theory, the phase information of input signal is carried out with
Track locks so that output signal keeps consistent with input signal in phase place, has output frequency suppression stable, preferable spuious
Advantage, it addition, the simple in construction of phase-locked loop, the most largely decreases debugging efforts.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the frequency source module that the present invention exports based on programmable control circuit regulating frequency；
Fig. 2 is that the frequency source module of the present invention outputs test result.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described further.
It is an object of the invention to design a kind of frequency source module based on the output of programmable control circuit regulating frequency, and full
Foot following three points requirement.Requirement one: reference frequency output.Highest frequency is higher than 2GHz, and low-limit frequency is not provided with lower limit, and
And output frequency is not fixing, can be programmed controlling according to needs so that output frequency is more flexible；Require two: defeated
Go out power bracket.Output maximum is less than 5dBm, it is contemplated that frequency source module provides signal may to different circuit,
Demanded power output is not quite similar, so output also can be by programming and is controlled；Require three: can carry out with backboard
Interconnection, provides reference signal for other functional modules on backboard.
As it is shown in figure 1, the invention mainly comprises three parts:
Part one: phase-locked loop；
Phase-locked loop includes phase discriminator (PFD), voltage controlled oscillator (VCO), R frequency divider, Fractional-N frequency device and partial loop
Wave filter (LF).
Phase-locked loop 100MHz crystal oscillator input reference signal from frequency source module, reference signal enters R frequency divider
Afterwards, frequency become before R/mono-, send into phase discriminator；Reference signal is divided through Fractional-N frequency device by phase discriminator with described
After signal carry out phase bit comparison, output current signal after electric charge pump, the average of electric current becomes with the phase contrast of two signals
Direct ratio, sends into loop filter；Signal forms integral voltage in loop filter after integration, sends into voltage controlled oscillator；
The output frequency of voltage controlled oscillator is directly proportional to integral voltage, and output frequency again passes by Fractional-N frequency device, frequency become before N
/ mono-, compare in phase discriminator with reference input.Owing to whole loop is a negative-feedback regu-lation, so finally can
Two input signal phase differences reaching phase discriminator are almost equal, thus reach lock-out state.Signal after locking shakes voltage-controlled
Swinging through frequency dividing in device, frequency exports after becoming D/mono-.
Part two: control module
Described control module mainly includes single-chip microcomputer and peripheral circuit thereof.By to R frequency divider, Fractional-N frequency in phaselocked loop
Device and voltage controlled oscillator are programmed control break frequency dividing ratio, thus the output frequency of regulating frequency source module.By to voltage-controlled
Agitator is programmed its output of control break, thus the output that regulating frequency source module is overall.
Regulating phaselocked loop R frequency divider frequency division value ratio 32 by control module, regulation Fractional-N frequency device frequency dividing ratio is 770, regulation pressure
Controlled oscillator frequency dividing ratio is 1, thus the output frequency of regulating frequency source module is 2406.25MHz, simultaneously can also be by controlling
Module regulating frequency source module output is about 0dBm.
Part three: power-switching circuit and back panel connector.
Needed for power-switching circuit is mainly used in the 5V voltage that backboard provides is converted to phaselocked loop and control module
3.3V supply voltage.
After setting completed, carry out circuit real output signal measurement, utilize the N9918A audiofrequency spectrometer of Agilent to carry out letter
Number measure, the result of measurement is illustrated in fig. 2 shown below, and as seen from Figure 2, frequency source module final output signal frequency is
2406.25MHz, output is 0.0062dBm.
Knowable to measurement result, frequency source module output frequency is consistent with design parameter.
From data above, the frequency source functions of modules that Design and Machining makes is normal, the phase noise of output and miscellaneous
Scattered performance meets design objective requirement；Meanwhile, the programming of the output frequency of frequency source module, output is adjustable, has preferably
Motility.
Claims (3)
1. a frequency source module based on the output of programmable control circuit regulating frequency, it is characterised in that: include phase-locked loopback
Road, control module, power-switching circuit and back panel connector；
Described phase-locked loop includes phase discriminator (PFD), voltage controlled oscillator (VCO), R frequency divider, Fractional-N frequency device and loop filtering
Device (LF)；Enter after R frequency divider from the reference signal of crystal oscillator output, frequency become before R/mono-, be re-fed into phase demodulation
Device；Phase discriminator by reference signal with through voltage controlled oscillator output again through Fractional-N frequency device divide after signal carry out phase bit comparison after
Output current signal, the average of current signal exports again after Fractional-N frequency device divides with reference signal with through voltage controlled oscillator
Phase contrast between signal is directly proportional, and sends into loop filter；Signal forms integration electricity in loop filter after integration
Pressure, sends into voltage controlled oscillator；The output frequency of voltage controlled oscillator is directly proportional to integral voltage, output signal again through Fractional-N frequency device,
Frequency become before N/mono-, compare in phase discriminator with reference input；Whole loop is a negative-feedback regu-lation,
Two input signal phase differences being finally reached phase discriminator are almost equal, thus reach lock-out state；Signal after locking is in pressure
Through frequency dividing in controlled oscillator, frequency exports after becoming D/mono-.
Control module, phaselocked loop R frequency divider, Fractional-N frequency device and the frequency dividing ratio of voltage controlled oscillator of regulation phase-locked loop, thus adjust
The output frequency of joint frequency source module, simultaneously also by control module regulating frequency source module output；
Power-switching circuit and back panel connector, the supply voltage that backboard provides is converted into phase-locked loop by power-switching circuit
With the supply voltage needed for control module, electronics that can be different from other functional module composition functions of backboard by back panel connector
System, thus simplify electronic system design difficulty, strengthen motility.
Frequency source module based on the output of programmable control circuit regulating frequency the most according to claim 1, its feature exists
In: described control module includes single-chip microcomputer and peripheral circuit thereof, by R frequency divider, Fractional-N frequency device and VCO in phaselocked loop
Device is programmed control break frequency dividing ratio, thus the output frequency of regulating frequency source module；By voltage controlled oscillator is compiled
Process control changes its output, thus the output that regulating frequency source module is overall.
Frequency source module based on the output of programmable control circuit regulating frequency the most according to claim 1, its feature exists
In: the adjusting range of the frequency dividing ratio of described R frequency divider is 1 to 4095, the adjusting range of the frequency dividing ratio of Fractional-N frequency device be 12 to
262143, the adjusting range of the frequency dividing ratio of voltage controlled oscillator is 1 to 63.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610344262.9A CN106059572A (en) | 2016-05-23 | 2016-05-23 | Frequency source module of adjusting frequency output based on programmable control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610344262.9A CN106059572A (en) | 2016-05-23 | 2016-05-23 | Frequency source module of adjusting frequency output based on programmable control circuit |
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| CN106059572A true CN106059572A (en) | 2016-10-26 |
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| CN201610344262.9A Pending CN106059572A (en) | 2016-05-23 | 2016-05-23 | Frequency source module of adjusting frequency output based on programmable control circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809241A (en) * | 2017-11-07 | 2018-03-16 | 晶晨半导体(上海)股份有限公司 | A kind of frequency dividing adjusting method of PLL |
| CN112532237A (en) * | 2020-11-18 | 2021-03-19 | 浙江吉利控股集团有限公司 | Portable adjustable frequency source device |
| CN113098501A (en) * | 2021-06-07 | 2021-07-09 | 成都市克莱微波科技有限公司 | Design method of broadband miniaturization rapid frequency synthesis |
| CN113392609A (en) * | 2021-07-01 | 2021-09-14 | 华北电力大学 | Method for determining switching oscillation current of power module |
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| US20070120616A1 (en) * | 2005-11-29 | 2007-05-31 | Gonzalez Armando J | Multi-band frequency generation method and apparatus |
| CN201008144Y (en) * | 2006-12-31 | 2008-01-16 | 中国科学院半导体研究所 | Phase lock loop circuit of charge pump |
| CN101854171A (en) * | 2010-05-21 | 2010-10-06 | 中兴通讯股份有限公司 | Multi-frequency point simulating phase-locked loop circuit |
| CN204272083U (en) * | 2014-12-18 | 2015-04-15 | 陕西烽火实业有限公司 | A kind of ultrashort wave frequency hopping station frequency synthesizer |
-
2016
- 2016-05-23 CN CN201610344262.9A patent/CN106059572A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070120616A1 (en) * | 2005-11-29 | 2007-05-31 | Gonzalez Armando J | Multi-band frequency generation method and apparatus |
| CN201008144Y (en) * | 2006-12-31 | 2008-01-16 | 中国科学院半导体研究所 | Phase lock loop circuit of charge pump |
| CN101854171A (en) * | 2010-05-21 | 2010-10-06 | 中兴通讯股份有限公司 | Multi-frequency point simulating phase-locked loop circuit |
| CN204272083U (en) * | 2014-12-18 | 2015-04-15 | 陕西烽火实业有限公司 | A kind of ultrashort wave frequency hopping station frequency synthesizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809241A (en) * | 2017-11-07 | 2018-03-16 | 晶晨半导体(上海)股份有限公司 | A kind of frequency dividing adjusting method of PLL |
| CN107809241B (en) * | 2017-11-07 | 2021-08-06 | 晶晨半导体(上海)股份有限公司 | PLL frequency division adjusting method |
| CN112532237A (en) * | 2020-11-18 | 2021-03-19 | 浙江吉利控股集团有限公司 | Portable adjustable frequency source device |
| CN113098501A (en) * | 2021-06-07 | 2021-07-09 | 成都市克莱微波科技有限公司 | Design method of broadband miniaturization rapid frequency synthesis |
| CN113392609A (en) * | 2021-07-01 | 2021-09-14 | 华北电力大学 | Method for determining switching oscillation current of power module |
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Application publication date: 20161026 |