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Comparator

A comparator and voltage comparison technology, applied in the field of comparators, can solve the problems of slow flipping speed, kickback noise, comparator processing speed lag, etc.

Pending Publication Date: 2021-05-28
CHANGXIN MEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to solve the problems of the comparator in the prior art that the processing speed of the comparator is lagging and the turnover speed is slow due to the delay of charging and discharging at the output terminal, and the kickback noise will be formed, which will interfere with the comparison voltage. , leading to output error flipping and other issues to be improved

Method used

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Embodiment Construction

[0039] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. A preferred embodiment of the application is shown in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0040] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to and integrally integrated with the other element, or there may be an intervening element at the same time. The terms "mounted", "one end", "the other end" and similar expressions are used herein for the purpose of description only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commo...

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PUM

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Abstract

The invention relates to a comparator, and the comparator comprises a first-stage operational amplifier circuit, a second-stage operational amplifier circuit, a biasing circuit and a clamping circuit; the first-stage operational amplifier circuit comprises two voltage input ends and a voltage output end; the second-stage operational amplifier circuit is connected with the biasing circuit and the voltage output end of the first-stage operational amplifier circuit; and the clamping circuit is connected with the voltage output end of the first-stage operational amplifier circuit. According to the comparator, the clamping circuit is additionally arranged, the highest voltage of the voltage output end of the first-stage operational amplifier circuit can be clamped to the preset voltage, the voltage change amplitude of the voltage output end of the first-stage operational amplifier circuit is small in the working process of the comparator, the discharging delay of the voltage output end of the first-stage operational amplifier circuit can be shortened, and the discharging time delay of the first-stage operational amplifier circuit is shortened. Therefore, the overturning speed of the comparator is improved.

Description

technical field [0001] The present application relates to the technical field of integrated circuits, in particular to a comparator. Background technique [0002] Existing comparators are widely used in various fields. One of the requirements of the comparator is to be able to quickly obtain the comparison result so that the next step can be processed quickly. For example, when an overcurrent abnormality is detected, it is hoped that the abnormal situation can be processed as soon as possible. . However, due to the inherent delay of the comparator itself, the processing speed often lags behind, and the comparator's flipping speed is relatively slow. This delay is mainly due to the output of the first-stage operational amplifier circuit and the second-stage operational amplifier circuit The delay caused by the charging and discharging of the node at the output end, for example, when the first to-be-compared voltage VP is greater than the second to-be-compared voltage VN, the...

Claims

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Application Information

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IPC IPC(8): H03K5/24
CPCH03K5/2472H03K5/2481H03K5/1254H03K5/15073H03K2005/00156
Inventor 季汝敏
Owner CHANGXIN MEMORY TECH INC