Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Differential charge pump circuit with operational amplifier

An operational amplifier, charge pump technology, applied in the direction of electrical components, automatic power control, etc., can solve the problems of increasing charge and discharge current, changing the bandwidth of the PLL loop of the phase-locked loop, etc., to improve the mismatch between charge current and discharge current. Effect

Active Publication Date: 2019-11-26
TIANJIN JINHANG COMP TECH RES INST
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the output voltage increases, the charge and discharge current increases due to the effect of channel length modulation, thus changing the bandwidth of the PLL loop

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
  • Differential charge pump circuit with operational amplifier
  • Differential charge pump circuit with operational amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] In order to make the purpose, content, and advantages of the present invention clearer, the specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0053] In order to solve the problems of the prior art, the present invention provides a differential charge pump circuit with an operational amplifier, such as figure 2 As shown, the differential charge pump circuit includes: a current source I1, a pull-up current mirror, a pull-down current mirror, a transmission gate switch, an operational amplifier, a first resistor R1, a first capacitor C1, a second capacitor C2, and a third capacitor Cp3 and the fourth capacitor CP4; the third capacitor Cp3 and the fourth capacitor CP4 are grounded;

[0054] The pull-up current mirror is used to convert the reference source current into the charging current of the charge pump;

[0055] the pull-down current mirror is used to convert the ref...

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 belongs to the technical field of integrated circuit design, and relates to a differential charge pump circuit with an operational amplifier. The differential charge pump circuit comprises a current source I1, a pull-up current mirror, a pull-down current mirror, a transmission gate switch, the operational amplifier, a first resistor R1, a first capacitor C1, a second capacitor C2, athird capacitor Cp3 and a fourth capacitor CP4. The differential charge pump circuit has the following beneficial effects that (1) the problem that the charging current and the discharging current ofa traditional charge pump are not matched is solved; ; (2) the problem of clock feed-through is solved; and (3) the charge sharing effect influence is improved.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit design, and in particular relates to a differential charge pump circuit with an operational amplifier, which is mainly applied to a phase-locked loop circuit in a high-speed application environment. Background technique [0002] The charge pump is an important unit circuit that composes the phase-locked loop. It is connected to the frequency discriminator PFD and the voltage-controlled oscillator VCO, and plays a key role in the performance of the entire phase-locked loop. In the high-speed application environment, the requirements for the charge pump are particularly high, and the glitch and jitter of the output voltage of the charge pump need to be considered. [0003] However, in the actual design, the charge pump has problems such as leakage current, current mismatch, timing mismatch, and the change of charge and discharge current with the output voltage. Among them, the current mi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/089
CPCH03L7/0891Y02B70/10
Inventor 晋超超朱天成候俊马
Owner TIANJIN JINHANG COMP TECH RES INST
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com