Unlock instant, AI-driven research and patent intelligence for your innovation.

Offset correction method of fully symmetrical four-terminal dynamic comparator based on charge matching

A dynamic comparator and offset correction technology, applied in the direction of analog/digital conversion calibration/testing, etc., can solve problems such as large offset and easy noise interference, and achieve the effect of eliminating offset, ensuring charge matching, and reducing influence

Active Publication Date: 2017-11-21
TSINGHUA UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, this structure has a larger misalignment and is more susceptible to noise interference

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
  • Offset correction method of fully symmetrical four-terminal dynamic comparator based on charge matching
  • Offset correction method of fully symmetrical four-terminal dynamic comparator based on charge matching
  • Offset correction method of fully symmetrical four-terminal dynamic comparator based on charge matching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0030] In the present invention, unless otherwise clearly specified...

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 an offset correction method of a fully symmetrical four-terminal dynamic comparator based on charge matching, comprising the following steps: controlling the comparator to enter the offset correction state according to a clock signal, a reset signal and a correction signal; Common-mode level signal; control the adjustable capacitor connected to the output terminal of the comparator to match the charge of the positive and negative terminals of the comparator output under the action of the adjustable capacitor, wherein the adjustable capacitor connects the source and drain of the NMOS transistor Very short formed. The method of the invention can eliminate the influence of the floating node on the speed and precision of the comparator, and eliminate the imbalance caused by various factors in the dynamic comparator, thereby improving the circuit precision. The invention also provides an offset correction system based on a charge-matched fully symmetrical four-terminal dynamic comparator.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an offset correction method and system for a fully symmetrical four-terminal dynamic comparator based on charge matching. Background technique [0002] High-speed successive approximation analog-to-digital converters are mostly used in radio frequency front-end receivers of wireless sensor networks. In this application, high-speed, medium conversion accuracy and low power consumption analog-to-digital converters have a significant impact on system performance. [0003] The successive approximation analog-to-digital converter mainly includes four parts: sample-and-hold circuit, digital-to-analog converter, comparator and digital control logic. Among them, the comparator is the main source of power consumption in the successive approximation analog-to-digital converter, and is mainly divided into static comparators and dynamic comparators. Among them, the static compar...

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 Patents(China)
IPC IPC(8): H03M1/10
Inventor 韩雪魏琦杨华中汪蕙
Owner TSINGHUA UNIV