Low-noise reference signal generator and signal generation method

A reference signal, low noise technology, applied in the direction of electrical components, automatic power control, etc., can solve problems such as large additional noise, and achieve the effect of low frequency accuracy

Inactive Publication Date: 2014-01-08
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The present invention proposes a low-noise reference signal generator and a signal generating method, which solves the problem that the existing low-noise reference phase-locked frequency synthesis circuit loop itself has relatively large additional noise and cannot synthesize a signal from a very close carrier (1Hz frequency deviation) ) problem with reference signals that all have very low phase noise to begin with

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] Such as figure 2 As shown, the low-noise reference signal generator of the present invention includes: 10MHz constant temperature crystal oscillator 21 , low-noise frequency multiplication circuit 22 , double-balanced diode phase detector 23 , integral low-pass filter circuit 24 and 100MHz constant temperature crystal oscillator 25 .

[0030] The 10MHz constant temperature crystal oscillator 21 is used as the frequency reference of the reference signal...

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Abstract

The invention provides a low-noise reference signal generator and a signal generation method. The generator comprises a 10MHz constant-temperature crystal oscillator, a low-noise frequency doubling circuit, a double-balance diode phase discriminator, an integral low-pass filtering circuit and a 100MHz constant-temperature crystal oscillator. A 100MHz reference signal generated by the low-noise reference signal generator has the phase noise starting from 1Hz at the extremely low near end, and has very high frequency accuracy and extremely low aging rate after correction.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a low-noise reference signal generator, and also to a method for generating a low-noise reference signal. Background technique [0002] With the development of modern radar and radio communication technology, various electronic devices have continuously put forward higher requirements for the frequency synthesizers used in their internal applications or system tests. The most important point is to have extremely low sideband phase noise. Most frequency synthesizers usually use a high-stable time base as a reference, and then use various frequency synthesis techniques to achieve different frequency coverage or achieve purposes such as reducing phase noise, improving frequency stability and frequency resolution, etc., to meet the needs of the system At this time, the phase noise of the reference signal generally directly determines the close-in phase noise of the final frequency sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/08
Inventor 刘亮樊晓腾刘青松何攀峰范吉伟徐明哲
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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