Charge pump device for phase locked loop clock data restorer

A clock data recovery, phase-locked loop technology, applied in electrical components, conversion equipment without intermediate conversion to AC, automatic power control, etc., can solve the problems affecting the clock data recovery system phase tracking, large noise, etc. Switch mismatch, eliminate charge sharing, reduce the effects of complexity

Active Publication Date: 2015-07-22
芯动微电子科技(珠海)有限公司
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The system-on-chip will integrate ultra-large-scale digital modules and interface modules. The high-speed switching of the logic gates of the digital modules will introduce large noise on the

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
  • Charge pump device for phase locked loop clock data restorer
  • Charge pump device for phase locked loop clock data restorer
  • Charge pump device for phase locked loop clock data restorer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Such as Figure 4~7 The charge pump device for the phase-locked loop clock data recovery device shown includes a device box body, and a power supply and a grounding interface are arranged in the box body. Set component 1. Specifically, the current bias component 1 is provided with at least three sets of output ports, including a first bias output port, a second bias output port and a third bias output port, and the three sets of output ports are connected to the main charging and discharging component 2 and The auxiliary charging and discharging assembly 3, the main charging and discharging assembly 2 and the output terminals of the auxiliary charging and discharging assembly 3 are connected and connected to the output port 7 through the output connection control switch S3. At the same time, the output port 7 is connected with a voltage-controlled oscillator, the main charge and discharge assembly 2 and the auxiliary charge and discharge assembly 3 are connected to the...

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 relates to a charge pump device for a phase locked loop clock data restorer. According to the charge pump, on the basis of the traditional charge pump, through adjusting a current relationship between a pull-up current source and a pull-down current source, a topological structure of the pull-down current source is changed, and current pull-up and pull-down channels can be multiplexed at the same time to have voltage follower functions, jitter of loop switching and charge sharing on an oscillator control voltage can be eliminated, and no extra voltage follower operational amplifier is needed. Control switches of the charge pump all adopts an MOS transistor of the same type for realization, and influences of switch mismatch on clock phase recovery can be eliminated. In addition, charging and discharging current of the charge pump is controlled by the oscillator control voltage, no extra reference source is needed, the charging and discharging current is dynamically changed along with the frequency of the oscillator, and thus the charge pump can be used for constructing an adaptive bandwidth path.

Description

technical field [0001] The invention relates to a charge pump device, in particular to a charge pump device for a phase-locked loop clock data restorer. Background technique [0002] The clock data restorer is widely used in the receiving end of the high-speed serial data transmission system, it recovers the correct sampling clock from the serial data, the application of the clock data restorer based on the phase locked loop (Phase locked loop, PLL) The most common, this type of clock data restorer consists of two loops: a frequency synthesis loop, a phase-locked loop, and a phase tracking loop. The working principle is to first generate an appropriate frequency and then perform phase tracking. For the architecture and application of the clock data recovery device, please refer to the article Architectures For Multi-gigabit Wire-linked Clock and Data Recovery published by Ming-ta Hsieh et al. on Circuits and Systems Magazine, a journal of the International Institute of Elect...

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): H03L7/099H03L7/085H02M3/07
Inventor 左红建敖海敖钢裴栋
Owner 芯动微电子科技(珠海)有限公司
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