The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2026
Filed:
May. 31, 2022
Huawei Technologies Co., Ltd., Shenzhen, CN;
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
This application provides an operational amplifier that increases the stability and settling speed of a common-mode feedback circuit. The operational amplifier includes N stages of amplifiers connected in series and M common-mode feedback circuits, where N and M are integers, N≥3, and N≥M>1. An icommon-mode feedback circuit in the M common-mode feedback circuits is configured to: detect a common-mode output voltage of a (j+b)stage of amplifier, and regulate an electrical parameter of at least one of the jstage of amplifier to the (j+b)stage of amplifier, to stabilize the common-mode output voltage of the (j+b)stage of amplifier. An Mcommon-mode feedback circuit is configured to detect and stabilize a common-mode output voltage of an Nstage of amplifier. Herein i, j, and b are integers, M≥i≥1, N≥j≥1, i≥j, j+b≤N, and b≥0.