CN102638262A - Miniature phase-locked frequency synthesizer - Google Patents
Miniature phase-locked frequency synthesizer Download PDFInfo
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- CN102638262A CN102638262A CN2012101281041A CN201210128104A CN102638262A CN 102638262 A CN102638262 A CN 102638262A CN 2012101281041 A CN2012101281041 A CN 2012101281041A CN 201210128104 A CN201210128104 A CN 201210128104A CN 102638262 A CN102638262 A CN 102638262A
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Abstract
The invention discloses a miniature phase-locked frequency synthesizer. The miniature phase-locked frequency synthesizer comprises a constant-temperature crystal oscillator, a phase detector, a loop filter, a voltage control oscillator and one or more frequency dividers, wherein the constant-temperature crystal oscillator, the phase detector, the loop filter and the voltage control oscillator are sequentially connected with one another, the output end of the voltage control oscillator is connected with the phase detector through a frequency divider a, and a frequency divider b is serially connected between the constant-temperature crystal oscillator and the phase detector. As a phase-locked loop has the functions of frequency stabilization and the like, the miniature phase-locked frequency synthesizer provided by the invention has the advantages that the operations of addition, subtraction, multiplication and division of signals can be achieved, the miniature phase-locked frequency synthesizer can serve as a frequency adder/subtracter, a frequency multiplier, a frequency divider and the like, a lot of high-stability and high-accuracy discrete frequency signals can be generated by using one piece of crystal, the structure is simple, the volume is smaller, the integration is easy, and the like.
Description
Technical field
The present invention relates to a kind of miniature frequency synthesizer of phase locking.
Background technology
Frequency synthesizer is as benchmark, through a series of high definition frequency sources with certain frequency interval of synthetic technology generation with the high-precision crystal oscillator.Along with the development of microwave technology, also increasingly high to the requirement of frequency synthesizer, as to characteristic requirements such as frequency stabilizations; Existing frequency synthesizer can only be accomplished a kind of function of frequency synthesis, and in the frequency synthesis process, can only accomplish and add computing, if will realize similar multiplication and division, computing such as subtract; Then need establish miscellaneous equipment in addition, it is single to have the computing structure, complicated circuit; Volume is bigger, and cost is higher relatively, can't with shortcomings such as the integrated use of other element.
Summary of the invention
The object of the invention promptly is to overcome the deficiency of prior art; A kind of miniature frequency synthesizer of phase locking is provided; Phase-locked loop has effects such as frequency stabilization; Can accomplish the adding of signal, subtract, the multiplication and division computing, can be used as uses such as frequency addition (subtracting) device, frequency multiplier, frequency divider, can produce the signal of a large amount of discrete frequencies of high stability and pinpoint accuracy with a crystal.
The object of the invention is realized through following technical scheme: a kind of miniature frequency synthesizer of phase locking; It comprises constant-temperature crystal oscillator, phase discriminator, loop filter, voltage controlled oscillator and one or more frequency divider; Constant-temperature crystal oscillator, phase discriminator, loop filter, voltage controlled oscillator connect in order; The output of voltage controlled oscillator is connected with phase discriminator through frequency divider a, is connected in series a frequency divider b between constant-temperature crystal oscillator and the phase discriminator.
The invention has the beneficial effects as follows: the present invention provides a kind of miniature frequency synthesizer of phase locking; Phase-locked loop has effects such as frequency stabilization, have can accomplish the adding of signal, subtract, the multiplication and division computing, can be used as uses such as frequency addition (subtracting) device, frequency multiplier, frequency divider; Can produce the signal of a large amount of discrete frequencies of high stability and pinpoint accuracy with a crystal; Simple in structure, volume is less, is easy to advantages such as integrated.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further description, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1; A kind of miniature frequency synthesizer of phase locking; It comprises constant-temperature crystal oscillator, phase discriminator (Phase Detector), loop filter (Loop Filter), voltage controlled oscillator (Voltage Control Oscillator) and one or more frequency divider (Frequency Divider); Constant-temperature crystal oscillator, phase discriminator, loop filter, voltage controlled oscillator connect in order; The output of voltage controlled oscillator is connected with phase discriminator through frequency divider a, is connected in series a frequency divider b between constant-temperature crystal oscillator and the phase discriminator.
Phase discriminator compares with the phase place of voltage controlled oscillator output signal Vo (t) input signal Vi (t), produces error voltage Vd (t); Filter is eliminated radio-frequency component and the noise of error voltage Vd (t), and can improve the noiseproof feature of phase-locked loop; The frequency of oscillation of voltage controlled oscillator will be controlled by the loop filter output voltage.When the phase-locked loop operate as normal, output signal frequency equates with the frequency of input signal, i.e. Fo/N=Fr/R.
When the loop no signal was imported, voltage controlled oscillator was operated in " free oscillation " state, and its frequency of oscillation is f1; If loop obtains input signal; Phase discriminator will compare the phase place of input signal and voltage controlled oscillator output signal, produces error voltage, and this error voltage is through behind the loop filter; The frequency and the phase place of control voltage controlled oscillator reduce the frequency of two signals and phase difference.If the frequency f of input signal 2 and f1 ten minutes are close; The feedback characteristics of phase-locked loop can make voltage controlled oscillator output signal and input signal synchronously perhaps " locking " so; This moment, the output signal frequency of voltage controlled oscillator equaled frequency input signal, and phase difference is a constant.In case go into after the lock, because loop has output signal frequency " tracking " frequency input signal that automatic control action will make voltage controlled oscillator.
Claims (1)
1. miniature frequency synthesizer of phase locking; It is characterized in that: it comprises constant-temperature crystal oscillator, phase discriminator, loop filter, voltage controlled oscillator and one or more frequency divider; Constant-temperature crystal oscillator, phase discriminator, loop filter, voltage controlled oscillator connect in order; The output of voltage controlled oscillator is connected with phase discriminator through frequency divider a, is connected in series a frequency divider b between constant-temperature crystal oscillator and the phase discriminator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101281041A CN102638262A (en) | 2012-04-28 | 2012-04-28 | Miniature phase-locked frequency synthesizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101281041A CN102638262A (en) | 2012-04-28 | 2012-04-28 | Miniature phase-locked frequency synthesizer |
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| CN102638262A true CN102638262A (en) | 2012-08-15 |
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| CN2012101281041A Pending CN102638262A (en) | 2012-04-28 | 2012-04-28 | Miniature phase-locked frequency synthesizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330811A (en) * | 2014-11-25 | 2015-02-04 | 南宁势成微电子有限公司 | Radio frequency device for Beidou second-generation navigation system |
| CN104601116A (en) * | 2015-01-23 | 2015-05-06 | 北京大学 | Frequency multiplier based on delayed phase-locked loop structure |
| CN109845089A (en) * | 2016-09-02 | 2019-06-04 | Mmt有限公司 | The electromechanical assemblies controlled by pulse width modulating signal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101242185A (en) * | 2008-02-22 | 2008-08-13 | 华中科技大学 | Dynamically configurable self-reconstructable wide frequency mixer |
| CN101436859A (en) * | 2007-11-16 | 2009-05-20 | 安凡微电子(上海)有限公司 | Rapidly-locked frequency generator |
| CN101931404A (en) * | 2010-06-21 | 2010-12-29 | 胡伟东 | Phase lock technique-based microwave carbon testing frequency synthesizer |
| CN202535340U (en) * | 2012-04-28 | 2012-11-14 | 成都泰格微波技术股份有限公司 | Micro phase lock frequency synthesizer |
-
2012
- 2012-04-28 CN CN2012101281041A patent/CN102638262A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436859A (en) * | 2007-11-16 | 2009-05-20 | 安凡微电子(上海)有限公司 | Rapidly-locked frequency generator |
| CN101242185A (en) * | 2008-02-22 | 2008-08-13 | 华中科技大学 | Dynamically configurable self-reconstructable wide frequency mixer |
| CN101931404A (en) * | 2010-06-21 | 2010-12-29 | 胡伟东 | Phase lock technique-based microwave carbon testing frequency synthesizer |
| CN202535340U (en) * | 2012-04-28 | 2012-11-14 | 成都泰格微波技术股份有限公司 | Micro phase lock frequency synthesizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330811A (en) * | 2014-11-25 | 2015-02-04 | 南宁势成微电子有限公司 | Radio frequency device for Beidou second-generation navigation system |
| CN104601116A (en) * | 2015-01-23 | 2015-05-06 | 北京大学 | Frequency multiplier based on delayed phase-locked loop structure |
| CN104601116B (en) * | 2015-01-23 | 2017-07-18 | 北京大学 | Frequency multiplier based on delay locked loop structure |
| CN109845089A (en) * | 2016-09-02 | 2019-06-04 | Mmt有限公司 | The electromechanical assemblies controlled by pulse width modulating signal |
| CN109845089B (en) * | 2016-09-02 | 2022-12-09 | Mmt有限公司 | Electromechanical assembly controlled by pulse width modulation signal |
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Application publication date: 20120815 |