CN103684433A - Broadband frequency synthesizer - Google Patents
Broadband frequency synthesizer Download PDFInfo
- Publication number
- CN103684433A CN103684433A CN201310700281.7A CN201310700281A CN103684433A CN 103684433 A CN103684433 A CN 103684433A CN 201310700281 A CN201310700281 A CN 201310700281A CN 103684433 A CN103684433 A CN 103684433A
- Authority
- CN
- China
- Prior art keywords
- broadband
- phase discriminator
- frequently
- frequency
- combined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention discloses a broadband frequency synthesizer which comprises a phase discriminator, a charge pump, a loop filter, a multiway switch 1, a multiway voltage-controlled oscillator unit, a multiway switch 2, a directional coupler and a frequency divider, wherein the phase discriminator, the charge pump, the loop filter, the multiway switch 1, the multiway voltage-controlled oscillator unit, the multiway switch 2, the directional coupler and the frequency divider are sequentially connected. The frequency divider is connected with the phase discriminator; the multiway voltage-controlled oscillator unit achieves coverage of broadband-across octave signals through time-sharing switchover; reference parameters are input through the phase discriminator; the directional coupler outputs the signals. On the basis of a frequency synthesizing structure, miniaturization of the frequency synthesizer is achieved by the adoption of a composition unit sharing technology, a parameter matching technology and a power compensation technology, limitation of loop filtering is overcome, a phase-locked loop operates more stably, and broadband signals with better phase noise and stray indexes are obtained.
Description
Technical field
The present invention relates to communication technique field, particularly relate to a kind of broadband and frequently combine device.
Background technology
Frequently combine and in modern communications, radar and field of aerospace, occupy very important status, the performance of electronic system is played a decisive role, be therefore also referred to as " heart " of electronic system.Fast development along with modern radar, navigation, electronic countermeasures, the communication technology, frequently comprehensive design has been proposed to harsher requirement, not only the index request such as, Frequency spectrum quality steady to the short steady length of frequently combining is more and more higher, and its size, weight has also been proposed to the requirement of miniaturization.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of broadband and frequently combines device, in order to solve prior art broadband frequently combine device volume more greatly, the mutually noisy loose large and unsettled problem of loop.
For solving the problems of the technologies described above, the invention provides a kind of broadband and frequently combine device, comprising: the phase discriminator, charge pump, loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector 2, directional coupler and the frequency divider that connect successively; Wherein, frequency divider is connected with phase discriminator again; Multichannel voltage control oscillator unit switches by timesharing, has realized the covering of broadband across octave signal; Phase discriminator input reference parameter; Directional coupler output signal.
Further, multichannel voltage control oscillator unit comprises 5 sections of voltage controlled oscillator VCO, the frequency range of every section of VCO covering is as follows: VCO1 covers 350MHz～700MHz frequency range, VCO2 covers 700MHz～1000GHz frequency range, VCO3 covers 1000GHz～1700GHz frequency range, VCO4 covers 1700GHz～3000GHz frequency range, and VCO5 covers 3000GHz～6000GHz frequency range.
Further, by embedded chip, according to pre-divider ratio, calculate desired parameters, the communication mode by universal serial bus writes phase discriminator data, by continuous adjustment divider ratio, just can constantly regulate the output current of charge pump, obtain applicable loop filter bandwidth.
Further, the output current of charge pump calculates by following formula:
I=Nk/K
VCO
Wherein, K
vCOfor voltage-controlled sensitivity, N is divider ratio, k=3.
Further, described device also comprises:
Signal conditioning circuit, between directional coupler and frequency divider; For guaranteeing that phase discriminator can obtain applicable feedback signal.
Further, signal conditioning circuit comprises that amplifying circuit and attenuator circuit form, and by regulating the multiplication factor of amplifying circuit and the attenuation of attenuator circuit, thereby feedback signal is transferred to suitable amplitude, makes phase discriminator obtain suitable feedback power.
Further, attenuator circuit is adjustable attenuator circuit; According to Lagrange mean value theorem, in conjunction with the method for two-dimensional interpolation, using frequency and two parameters of attenuation as two dimensions, insert different data attenuator is decayed, constantly adjust, finally obtain making the feedback signal of full frequency band all to unify to reach the needed applicable power of phase discriminator.
Beneficial effect of the present invention is as follows:
The present invention is based on and frequently combine structure, adopt assembled unit common technology, parameter compounding technique and power back-off technology to realize the miniaturization of device, solve the limitation of loop filtering, made phase-locked loop more stable work, obtained the broadband signal of better making an uproar mutually with spuious index.
Accompanying drawing explanation
Fig. 1 is that in the embodiment of the present invention, the structural representation of device is combined in a kind of broadband frequently;
Fig. 2 is the schematic diagram of phase discriminator input reference parameter in the embodiment of the present invention;
Fig. 3 is the structural representation of signal conditioning circuit in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, does not limit the present invention.
As shown in Figure 1, the embodiment of the present invention relates to a kind of broadband and frequently combines device, comprising: the phase discriminator, charge pump, loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector 2, directional coupler and the frequency divider that connect successively; Wherein, frequency divider is connected with phase discriminator again; Reference parameter inputs to phase discriminator; Directional coupler output signal.
Multichannel voltage control oscillator unit comprises 5 sections of VCO(Voltage Controlled Oscillator voltage controlled oscillators), the frequency range of every section of VCO covering is as follows: VCO1 covers 350MHz～700MHz frequency range, VCO2 covers 700MHz～1000GHz frequency range, VCO3 covers 1000GHz～1700GHz frequency range, VCO4 covers 1700GHz～3000GHz frequency range, VCO5 covers 3000GHz～6000GHz frequency range, and the full frequency band that has completed like this 350MHz～6000GHz covers.
The assembled unit and the multichannel voltage control oscillator unit that phase discriminator, frequency divider, charge pump and loop filter etc., consist of are coordinated jointly, adopt variable connector timesharing between multistage VCO to switch, realized the covering of broadband across octave signal, complete broadband across octave comprehensive design frequently, greatly dwindled the volume of circuit.
In design, once the design of loop filter fixing after, the form of circuit is just fixing.Because the design of loop filter is to design with reference to a certain fixed frequency in the situation that, be difficult to meet wide band signal, the present embodiment design adopts parameter fit system, the pre-frequency dividing ratio obtaining according to output frequency, regulate the electric current of charge pump, make the bandwidth of loop filtering maintain 150kHz, for full frequency band steady lock and the good characteristic of making an uproar are mutually given security.Be implemented as follows:
As shown in Figure 2, by embedded chip, according to pre-divider ratio, calculate desired parameters, communication mode by universal serial bus writes phase discriminator data, by the pre-divider ratio of continuous adjustment, just can constantly regulate the output current of charge pump, obtain applicable loop filter bandwidth, thereby provide safeguard for the locking of full frequency band.
The transfer function formula of open loop is: H (S)=［ (I * K
vCO)/N ］ * [F (S)/S], wherein I is charge pump current, K
vCOfor voltage-controlled sensitivity, N is divider ratio, and H (S) represents open-loop gain; The transfer function of F (S) loop filter; S is variable.Get k=[(I * K
vCO)/N]; By a large amount of tests and calculating, the bandwidth that obtains loop filtering when k=3 is 150KHz, phase margin is 65 °, at this moment the parameter of loop is proper, for the required parameter of the present embodiment, in the case, can obtain suitable loop filter bandwidth, thereby provide safeguard for the locking of full frequency band.
In Design of PLL, the signal that returns to phase discriminator loop can produce larger impact to the spuious and phase noise of whole design, the words that feedback signal is excessive, spuious and noise will increase, feedback signal is crossed minor loop can not complete locking, so the embodiment of the present invention has added signal conditioning circuit at feedback loop, between directional coupler and frequency divider; For guaranteeing that phase discriminator can obtain applicable feedback signal.
As shown in Figure 3, signal conditioning circuit comprises that amplifying circuit and attenuator circuit form, and by regulating the multiplication factor of amplifying circuit and the attenuation of attenuator circuit, thereby feedback signal is transferred to suitable amplitude, makes phase discriminator obtain suitable feedback power.Attenuator circuit is adjustable attenuator circuit; According to Lagrange mean value theorem, method in conjunction with two-dimensional interpolation, using frequency and two parameters of attenuation as two dimensions, inserting different data decays to attenuator, constantly adjust, finally obtain making the feedback signal of full frequency band all to unify to reach the needed applicable power of phase discriminator, thus can obtain spuious little, the signal that the characteristic of making an uproar is mutually good; Guaranteed the quality of full frequency band signal.
The embodiment of the present invention is based on frequently combining structure, adopt assembled unit common technology, parameter compounding technique and power back-off technology to realize the miniaturization of device, solve the limitation of loop filtering, made phase-locked loop more stable work, obtained the broadband signal of better making an uproar mutually with spuious index.
Although be example object, the preferred embodiments of the present invention are disclosed, it is also possible those skilled in the art will recognize various improvement, increase and replacement, therefore, scope of the present invention should be not limited to above-described embodiment.
Claims (7)
1. a device is combined in broadband frequently, it is characterized in that, comprising: the phase discriminator, charge pump, loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector 2, directional coupler and the frequency divider that connect successively; Wherein, frequency divider is connected with phase discriminator again; Multichannel voltage control oscillator unit switches by timesharing, has realized the covering of broadband across octave signal; Phase discriminator input reference parameter; Directional coupler output signal.
2. device is combined in broadband as claimed in claim 1 frequently, it is characterized in that, multichannel voltage control oscillator unit comprises 5 sections of voltage controlled oscillator VCO, the frequency range of every section of VCO covering is as follows: VCO1 covers 350MHz～700MHz frequency range, VCO2 covers 700MHz～1000GHz frequency range, VCO3 covers 1000GHz～1700GHz frequency range, and VCO4 covers 1700GHz～3000GHz frequency range, and VCO5 covers 3000GHz～6000GHz frequency range.
3. device is combined in broadband as claimed in claim 1 or 2 frequently, it is characterized in that, by embedded chip, according to pre-divider ratio, calculate desired parameters, communication mode by universal serial bus writes phase discriminator data, by continuous adjustment divider ratio, just can constantly regulate the output current of charge pump, obtain applicable loop filter bandwidth.
4. device is combined in broadband as claimed in claim 3 frequently, it is characterized in that, the output current of charge pump calculates by following formula:
I=Nk/K
VCO
Wherein, K
vCOfor voltage-controlled sensitivity, N is divider ratio, k=3.
5. device is combined in the broadband as described in claim 1,2 or 4 frequently, it is characterized in that, described device also comprises:
Signal conditioning circuit, between directional coupler and frequency divider; For guaranteeing that phase discriminator can obtain applicable feedback signal.
6. device is combined in broadband as claimed in claim 5 frequently, it is characterized in that, signal conditioning circuit comprises that amplifying circuit and attenuator circuit form, by regulating the multiplication factor of amplifying circuit and the attenuation of attenuator circuit, thereby feedback signal is transferred to suitable amplitude, makes phase discriminator obtain suitable feedback power.
7. device is combined in broadband as claimed in claim 6 frequently, it is characterized in that, attenuator circuit is adjustable attenuator circuit; According to Lagrange mean value theorem, in conjunction with the method for two-dimensional interpolation, using frequency and two parameters of attenuation as two dimensions, insert different data attenuator is decayed, constantly adjust, finally obtain making the feedback signal of full frequency band all to unify to reach the needed applicable power of phase discriminator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310700281.7A CN103684433B (en) | 2013-12-18 | 2013-12-18 | A kind of broadband frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310700281.7A CN103684433B (en) | 2013-12-18 | 2013-12-18 | A kind of broadband frequency synthesizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103684433A true CN103684433A (en) | 2014-03-26 |
| CN103684433B CN103684433B (en) | 2016-08-17 |
Family
ID=50320898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310700281.7A Active CN103684433B (en) | 2013-12-18 | 2013-12-18 | A kind of broadband frequency synthesizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103684433B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104363013A (en) * | 2014-09-02 | 2015-02-18 | 中国科学院国家授时中心 | Frequency voltage converter with low additional noise |
| CN105811947A (en) * | 2014-12-31 | 2016-07-27 | 上海摩波彼克半导体有限公司 | Radio frequency switch and multipath output selector |
| CN105897298A (en) * | 2016-06-03 | 2016-08-24 | 北京航空航天大学 | Multi-stage modular wireless transceiver experimental platform |
| CN104202045B (en) * | 2014-08-07 | 2017-12-08 | 南京誉葆科技有限公司 | Broadband self-test signal source |
| CN109959825A (en) * | 2017-12-26 | 2019-07-02 | 东南大学 | A kind of non-linear voltage-controlled attenuator fitted calibration method based on Lagrange's interpolation |
| CN110417406A (en) * | 2019-06-25 | 2019-11-05 | 成都九洲迪飞科技有限责任公司 | The digital phase-locked loop of broadband frequency source is realized using integrated multisection type broadband VCO |
| CN110739966A (en) * | 2019-09-29 | 2020-01-31 | 浙江大学 | broadband low stray phase-locked loop circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389898A (en) * | 1992-06-22 | 1995-02-14 | Matsushita Electric Industrial Co., Ltd. | Phase locked loop having plural selectable voltage controlled oscillators |
| US20040124884A1 (en) * | 2002-12-31 | 2004-07-01 | Santanu Chaudhuri | Low gain phase-locked loop circuit |
| CN1748368A (en) * | 2003-02-14 | 2006-03-15 | 飞思卡尔半导体公司 | System and method for coarse tuning a phase locked loop (pll) synthesizer using 2-pi slip detection |
| CN101030781A (en) * | 2006-01-17 | 2007-09-05 | 三星电子株式会社 | Sigma-delta fractional-n phase locked loop for reducing lock time and frequency error |
| CN101436859A (en) * | 2007-11-16 | 2009-05-20 | 安凡微电子(上海)有限公司 | Rapidly-locked frequency generator |
| TW200935719A (en) * | 2008-02-05 | 2009-08-16 | Rafael Microelectronics Inc | Multi-band VCO |
-
2013
- 2013-12-18 CN CN201310700281.7A patent/CN103684433B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389898A (en) * | 1992-06-22 | 1995-02-14 | Matsushita Electric Industrial Co., Ltd. | Phase locked loop having plural selectable voltage controlled oscillators |
| US20040124884A1 (en) * | 2002-12-31 | 2004-07-01 | Santanu Chaudhuri | Low gain phase-locked loop circuit |
| CN1748368A (en) * | 2003-02-14 | 2006-03-15 | 飞思卡尔半导体公司 | System and method for coarse tuning a phase locked loop (pll) synthesizer using 2-pi slip detection |
| CN101030781A (en) * | 2006-01-17 | 2007-09-05 | 三星电子株式会社 | Sigma-delta fractional-n phase locked loop for reducing lock time and frequency error |
| CN101436859A (en) * | 2007-11-16 | 2009-05-20 | 安凡微电子(上海)有限公司 | Rapidly-locked frequency generator |
| TW200935719A (en) * | 2008-02-05 | 2009-08-16 | Rafael Microelectronics Inc | Multi-band VCO |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202045B (en) * | 2014-08-07 | 2017-12-08 | 南京誉葆科技有限公司 | Broadband self-test signal source |
| CN104363013A (en) * | 2014-09-02 | 2015-02-18 | 中国科学院国家授时中心 | Frequency voltage converter with low additional noise |
| CN104363013B (en) * | 2014-09-02 | 2018-06-08 | 中国科学院国家授时中心 | A kind of FV convertor of low additional noise |
| CN105811947A (en) * | 2014-12-31 | 2016-07-27 | 上海摩波彼克半导体有限公司 | Radio frequency switch and multipath output selector |
| CN105811947B (en) * | 2014-12-31 | 2019-07-02 | 展讯通信（上海）有限公司 | RF switch and demultiplexer |
| CN105897298A (en) * | 2016-06-03 | 2016-08-24 | 北京航空航天大学 | Multi-stage modular wireless transceiver experimental platform |
| CN109959825A (en) * | 2017-12-26 | 2019-07-02 | 东南大学 | A kind of non-linear voltage-controlled attenuator fitted calibration method based on Lagrange's interpolation |
| CN110417406A (en) * | 2019-06-25 | 2019-11-05 | 成都九洲迪飞科技有限责任公司 | The digital phase-locked loop of broadband frequency source is realized using integrated multisection type broadband VCO |
| CN110417406B (en) * | 2019-06-25 | 2022-11-22 | 成都九洲迪飞科技有限责任公司 | Digital phase-locked loop for realizing broadband frequency source by adopting integrated multi-section broadband VCO |
| CN110739966A (en) * | 2019-09-29 | 2020-01-31 | 浙江大学 | broadband low stray phase-locked loop circuit |
| CN110739966B (en) * | 2019-09-29 | 2021-12-17 | 浙江大学 | Broadband low-stray phase-locked loop circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103684433B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103684433A (en) | Broadband frequency synthesizer | |
| CN105577178B (en) | A kind of broadband low phase noise Sigma-Delta phaselocked loop | |
| CN103490777B (en) | low spurious frequency synthesizer | |
| CN102332912B (en) | Voltage controlled oscillator (VCO) capable of adjusting linearity of gain and two-point modulator based on VCO | |
| CN201328110Y (en) | Phase-locking frequency tracking device | |
| CN101136631B (en) | Frequency synthesizer and frequency synthesis method | |
| CN110417406A (en) | The digital phase-locked loop of broadband frequency source is realized using integrated multisection type broadband VCO | |
| CN108933597A (en) | A kind of thin step frequency synthesizer of broadband Low phase noise and frequency combining method | |
| CN116318122A (en) | Ultra-wideband miniaturized portable signal source | |
| CN108037332B (en) | Multi-channel reference clock generation module | |
| CN101447795B (en) | Low intermediate frequency (IF) digital receiver and frequency modulation method thereof | |
| CN102324929A (en) | Hopping frequency synthesizer for front end of millimeter wave holographic imaging system | |
| CN110289858A (en) | A kind of thin stepping frequency agility collaboration system in broadband | |
| CN202978895U (en) | Low phase noise frequency synthesizer | |
| CN104333378A (en) | Fast phase locking low-noise signal generator and signal generation method | |
| WO2016155278A1 (en) | Circuit and equipment for quickly locking microwave frequency source | |
| CN101527566A (en) | Current device for phase-locked loop and method thereof | |
| US9929737B2 (en) | Oscillator arrangement, method, computer program and communication device | |
| CN212012609U (en) | Internal and external reference self-adaptive switching circuit | |
| CN114553221A (en) | Frequency source and method for generating the same | |
| CN203722605U (en) | Integrated ultra wide band voltage-controlled oscillator | |
| CN203661041U (en) | Handheld ultra-short wave frequency hopping radio station frequency synthesizer | |
| CN203596813U (en) | Low-phase-noise frequency synthesizer | |
| CN209218066U (en) | A kind of hybrid frequency synthesizer based on orthogonal modulation | |
| CN204442345U (en) | A kind of quick lock in Microwave Frequency Source phase lock circuitry and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |