CN203522707U

CN203522707U - Miniature multi-loop type phase-locking frequency synthesizer

Info

Publication number: CN203522707U
Application number: CN201320668888.7U
Authority: CN
Inventors: 宁涛; 王润洪; 肖聪; 吴伟冬; 马刚
Original assignee: Chengdu Jiuhua Yuantong Technology Development Co Ltd
Current assignee: Chengdu Jiuhua Yuantong Technology Development Co Ltd
Priority date: 2013-10-29
Filing date: 2013-10-29
Publication date: 2014-04-02
Anticipated expiration: 2023-10-29

Abstract

The utility model discloses a miniature multi-loop type phase-locking frequency synthesizer, which is composed of a controller, at least two groups of single-loop phase-locked loops with symmetrical structures, and at least one group of frequency-mixing phase-locked loop, wherein the controller is respectively connected with the single-loop phase-locked loops and the frequency-mixing phase-locked loop, the two groups of single-loop phase-locked loops are mutually connected through a crystal oscillator, and output ends of the two groups of single-loop phase-locked loops are respectively connected with the frequency-mixing phase-locked loop. The miniature multi-loop type phase-locking frequency synthesizer provided by the utility model adopts the at least two groups of single-loop phase-locked loops with symmetrical structures while the two groups of single-loop phase-locked loops are interchangeable, simplifies the circuit structure and spatial arrangement, reduces the size, decreases the production cost and application cost, is easy to integrate, flexible in circuit structure and easy to expand, enables the two groups of single-loop phase-locked loops to be nested with each other through the frequency-mixing phase-locked loop, can set the number of frequency dividers in each loop according to the specific needs, and ensures that the requirements such as frequency agility, high resolution, low stray and low phase noise are satisfied.

Description

A kind of miniature polycycle frequency synthesizer of phase locking

Technical field

The utility model relates to a kind of miniature polycycle frequency synthesizer of phase locking.

Background technology

Frequency synthesizer is to use high-precision crystal oscillator as benchmark, by synthetic technology, produces a series of high definition frequency sources with certain frequency interval.Along with the development of microwave technology, also more and more higher to the requirement of frequency synthesizer, as the requirement of high-resolution, low spuious, the low aspect such as make an uproar mutually.Existing frequency synthesizer adopts Direct Digital structure more, not only circuit is complicated, volume is large, cost is relatively high, cannot with the integrated use of other element, and cannot meet the requirement of present frequency synthesizer to high-resolution, low spuious, the low aspect such as make an uproar mutually.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of miniature polycycle frequency synthesizer of phase locking is provided, solved existing frequency synthesizer not only circuit be complicated, volume is large, cost is relatively high, cannot with the integrated use of other element, and cannot meet the requirement of present frequency synthesizer to high-resolution, low spuious, the low aspect such as make an uproar mutually.

The purpose of this utility model is achieved through the following technical solutions: a kind of miniature polycycle frequency synthesizer of phase locking, it is by least two group single loop phase locked loop roads of controller, symmetrical configuration, and at least one group of Mixing PLL road forms, controller is connected with single loop phase locked loop road, Mixing PLL road respectively, between two groups of single loop phase locked loop roads, by crystal oscillator, interconnect, the output on two groups of single loop phase locked loop roads is connected with Mixing PLL road respectively;

Described single loop phase locked loop route phase discriminator a, voltage controlled oscillator a, coupler a and at least three frequency dividers form, frequency divider a, phase discriminator a, voltage controlled oscillator a, coupler a, frequency divider b connect in turn, and coupler a is also connected with phase discriminator a by frequency divider c;

Described Mixing PLL route phase discriminator b, voltage controlled oscillator b, coupler b, frequency mixer and at least three frequency dividers form, phase discriminator b, voltage controlled oscillator b, coupler b, frequency divider d, frequency mixer, frequency divider e, phase discriminator b connect in turn, and form loop, the two ends of frequency divider f are connected with output, the phase discriminator b on one group of single loop phase locked loop road respectively, and the input of frequency mixer is also connected with the output on another group single loop phase locked loop road.

The beneficial effects of the utility model are: the utility model provides a kind of miniature polycycle frequency synthesizer of phase locking, adopt at least two group single loop phase locked loop roads of symmetrical configuration, two groups of single loop phase locked loop roads are interchangeable, circuit structure and space layout have been simplified, reduced volume, production cost and use cost have been reduced, be easy to integrated, circuit structure is flexible, be easy to expansion, by Mixing PLL road, make two groups of single loop phase locked loop roads nested against one another, frequency divider number in each loop can be set according to specific needs, guarantee to meet high-resolution, the requirement of the low spuious and low aspect such as make an uproar mutually.

Accompanying drawing explanation

Fig. 1 is structured flowchart of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described, but protection range of the present utility model is not limited to the following stated.

As shown in Figure 1, a kind of miniature polycycle frequency synthesizer of phase locking, it is by least two group single loop phase locked loop roads of controller, symmetrical configuration, and at least one group of Mixing PLL road forms, controller is connected with single loop phase locked loop road, Mixing PLL road respectively, between two groups of single loop phase locked loop roads, by crystal oscillator, interconnect, the output on two groups of single loop phase locked loop roads is connected with Mixing PLL road respectively;

Two groups of described single loop phase locked loop roads comprise single loop phase locked loop road a1 and single loop phase locked loop road a2, described single loop phase locked loop road a1 is comprised of phase discriminator a1, voltage controlled oscillator a1, coupler a1 and at least three frequency dividers, frequency divider a1, phase discriminator a1, voltage controlled oscillator a1, coupler a1, frequency divider b1 connect in turn, and coupler a1 is also connected with phase discriminator a1 by frequency divider c1;

Described single loop phase locked loop road a2 is comprised of phase discriminator a2, voltage controlled oscillator a2, coupler a2 and at least three frequency dividers, frequency divider a2, phase discriminator a2, voltage controlled oscillator a2, coupler a2, frequency divider b2 connect in turn, and coupler a2 is also connected with phase discriminator a2 by frequency divider c2;

Described Mixing PLL route phase discriminator b, voltage controlled oscillator b, coupler b, frequency mixer and at least three frequency dividers form, phase discriminator b, voltage controlled oscillator b, coupler b, frequency divider d, frequency mixer, frequency divider e, phase discriminator b connect in turn, and form loop, the two ends of frequency divider f are connected with frequency divider b1, the phase discriminator b of single loop phase locked loop road a1 respectively, and the input of frequency mixer is also connected with the frequency divider b2 of single loop phase locked loop road a2.

Claims

1. a miniature polycycle frequency synthesizer of phase locking, it is characterized in that: it is by least two group single loop phase locked loop roads of controller, symmetrical configuration, and at least one group of Mixing PLL road forms, controller is connected with single loop phase locked loop road, Mixing PLL road respectively, between two groups of single loop phase locked loop roads, by crystal oscillator, interconnect, the output on two groups of single loop phase locked loop roads is connected with Mixing PLL road respectively;