Multiphase high-resolution phase locked loop

A high-resolution, multi-phase technology, applied in the automatic control of power, electrical components, etc., can solve the problems of complex loop design and analysis, high output resolution, and low noise

Active Publication Date: 2014-03-26
CHENGDU ANALOG CIRCUIT TECH INC
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of Delta_sigma phase-locked loop is high output resolution and low noise; the disadvantage is that the loop design

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multiphase high-resolution phase locked loop
  • Multiphase high-resolution phase locked loop
  • Multiphase high-resolution phase locked loop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] figure 1 Middle: DIVQ. Input frequency divider; PD. Phase detector; LP. Low-pass filter; VCO. Voltage controlled oscillator; DIVM. Output frequency divider; DIVNK. Multi-phase loop frequency divider;

[0014] figure 2 Middle: dual-mode frequency divider; phase controller; D flip-flop DFF 0 、DFF 1 、DFF 2 、DFF K-1 ;MUX.multiplexer;

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] The core idea of ​​the multi-phase high-resolution phase-locked loop is to use the multi-phase signal output by the voltage-controlled oscillator to perform fractional frequency division with zero jitter. Then you only need to solve how to get multi-phase signals and how to use multi-phase to perform fractional frequency division with zero jitter.

[0017] said figure 1 The input signal fin is connected to the input frequency divider, and the 1 / Q frequency division is performed by the input frequency divider; the out...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a high-resolution phase locked loop. The high-resolution loop phase locked loop comprises an input frequency divider, a phase detector connected with a reference frequency divider, a low pass filter connected with the phase detector, a voltage-controlled oscillator connected with the low pass filter, a multiphase loop frequency divider connected with the voltage-controlled oscillator and a phase frequency detector, and an output frequency divider connected with the voltage-controlled oscillator. The high-resolution phase locked loop provides high-resolution and low-noise clock signals, and the multiphase loop frequency divider provides high-resolution feedback signals for the phase frequency detector. The high-resolution phase locked loop improves the resolution of output signals of a phase locked loop in conditions of reducing loop analysis difficulty and reducing resource consumption.

Description

technical field [0001] The invention relates to frequency recovery and synthesis technology, in particular to a multi-phase high-resolution phase-locked loop. Background technique [0002] Phase-locked loops are widely used in modern electronic technology. The phase-locked loop is used in the microprocessor to provide a high-quality system clock for the system. In the field of wireless communication, phase-locked loop technology is used for up-down conversion, modulation and demodulation, etc. [0003] The basic structure of the phase-locked loop consists of a frequency-phase detector (FPD), a low-pass filter (LPF), and a voltage-controlled oscillator (VCO). The phase detector generates a voltage that is linearly proportional to the phase difference; the low-pass filter is used to suppress the high-frequency component of the output voltage of the phase detector; the voltage-controlled oscillator oscillates and outputs the corresponding frequency signal under the control of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H03L7/18
Inventor 不公告发明人
Owner CHENGDU ANALOG CIRCUIT TECH INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap