Comparator and analog-to-digital converter

Patent metadata

Field	Value
Publication number	US-9035680-B2
Application number	US-201414509806-A
Country	US
Kind code	B2
Filing date	Oct 8, 2014
Priority date	Oct 11, 2013
Publication date	May 19, 2015
Grant date	May 19, 2015

Abstract

Embodiments of the present invention provide a comparator and an analog-to-digital converter. A sampling module, a pre-amplifying module, and a coupling module in the comparator obtain a third differential voltage signal according to a positive input signal and a negative reference signal, and obtain a fourth differential voltage signal according to a negative input signal and a positive reference signal. A latch that is in the comparator and formed by a first P-type field effect transistor, a second P-type field effect transistor, a third field effect transistor, a fourth field effect transistor, a first switch, and a second switch is directly cross-coupled through gates, and directly collects the third differential voltage signal and the fourth differential voltage signal to the gates, so as to drive the latch to start positive feedback.

First claim

What is claimed is:

1. A comparator, comprising a sampling module, a pre-amplifying module, a coupling module, a first field effect transistor, a second field effect transistor, a third field effect transistor, a fourth field effect transistor, a first switch, and a second switch, wherein the first field effect transistor and the second field effect transistor both are P-type field effect transistors; the third field effect transistor and the fourth field effect transistor both are…

Assignees

• Huawei Tech Co Ltd

Inventors

• Yang Jinda
• Zhou Liren
• Xiong Jun

Classifications

• H03M1/38 Primary

  Electricity · mapped topic

• H03K3/012

  Electricity · mapped topic

• H03K3/013

  Electricity · mapped topic

• H03M1/002

  Electricity · mapped topic

• H03K17/693 Primary

  Electricity · mapped topic