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High-flatness broadband comb spectrum generator based on phase-locked loop mechanism and generation method thereof

A comb-shaped spectrum generator, phase-locked loop technology, applied in pulse processing, automatic power control, electrical components and other directions, can solve problems such as difficult to meet high flatness, broadband output fine spacing, etc.

Active Publication Date: 2018-12-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, with the rapid development of the communication industry, the performance requirements of the receiver are getting higher and higher, the required bandwidth is getting wider and the channel spacing is getting finer and finer, and the traditional analog comb generator based on diodes is difficult to meet the current high requirements. Requirements for flatness, broadband output, and fine pitch

Method used

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  • High-flatness broadband comb spectrum generator based on phase-locked loop mechanism and generation method thereof
  • High-flatness broadband comb spectrum generator based on phase-locked loop mechanism and generation method thereof
  • High-flatness broadband comb spectrum generator based on phase-locked loop mechanism and generation method thereof

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Embodiment 1

[0029] A high-flatness broadband comb spectrum generator based on a phase-locked loop mechanism, comprising an R frequency divider, a phase detector PD, a loop filter LP, a voltage-controlled oscillator VCO, an N frequency divider, and a band-pass filter, The R frequency divider, the phase detector PD, the loop filter LP, the voltage controlled oscillator VCO, the N frequency divider, and the band pass filter are connected in sequence, and the other end of the R frequency divider is the signal input end, and the band pass filter The other end of the device is a signal output end, and the output end of the N frequency divider is also connected to the input end of the phase detector PD.

[0030] The phase detector PD, R frequency divider, N frequency divider and voltage controlled oscillator VCO are packaged in a phase locked loop chip PLL.

[0031] A loop filter LP is also connected to the phase-locked loop chip PLL.

[0032] The phase-locked loop chip PLL is also connected wi...

Embodiment 2

[0036] like Figure 5 As shown in the figure, a high-flatness broadband comb spectrum generation method based on a phase-locked loop mechanism, the phase detector PD, R frequency divider, N frequency divider, voltage controlled oscillator VCO and loop filter LP are composed of A phase-locked loop PLL is designed, which uses the comb-shaped spectral spacing as the phase-detection frequency of the phase-locked loop to lock the high-frequency clock, and uses the N-frequency divider of the phase-locked loop feedback loop to divide the high-frequency clock to obtain a pulse signal, that is, a comb-shaped signal. spectral signal.

[0037] The reference input signal input of the signal input end is divided by the R frequency divider and then input to the input end of the phase detector, while the output of the voltage controlled oscillator VCO is processed by the N frequency divider and is another input of the phase detector, When the phase-locked loop is stably locked to the high-f...

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Abstract

The invention discloses a high-flatness broadband comb spectrum generator based on phase-locked loop mechanism and a generation method thereof, which consists of an R divider, phase detector PD, loopfiltering LP, voltage controlled oscillator VCO, N divider, bandpass and filter. A reference signal input is divided by an R divider into phase detector inputs, the output of R frequency divider is comb spectrum interval frequency by program control, at the same time, the frequency of the loop fed back by the N-divider is also set to the comb spectrum interval frequency. When the phase-locked loopis locked stably, a part of the output of the N-divider is led out to obtain the comb spectrum signal, and then the band-pass filter is used to suppress the unnecessary signals outside the bandwidthto obtain the final output comb spectrum signal. Compared with the traditional comb spectrum generator, this technique has the characteristics of high flatness, fine and adjustable spacing, wide band,adjustable comb spectrum zero point and so on.

Description

technical field [0001] The invention relates to the field of comb-shaped spectrum generators, in particular to a high-flatness broadband comb-shaped spectrum generator based on a phase-locked loop mechanism. Background technique [0002] The comb spectrum generator is a modular component capable of generating comb spectrum signals, which is widely used in the field of modern communication systems. In multi-channel receivers, correction sources are often used to calibrate the receiver to eliminate phase or amplitude errors between channels. If the conventional phase-locked loop method is adopted, only a single frequency point signal can be outputted each time, and then scanning is performed, but this will make the correction time become very long, which affects the real-time requirements of the receiver. In order to shorten the calibration time and provide the real-time requirements of the receiver operation, it is very important to use a comb spectrum generator. In the app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K5/135H03L7/093H03L7/18
CPCH03K5/135H03L7/093H03L7/18
Inventor 石玉刘汉子尉旭波钟慧
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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