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:
Feb. 07, 2023
Filed:
Apr. 29, 2022
Ampliphy Technologies Limited, Hangzhou, CN;
Tianlin Cao, Hangzhou, CN;
Hehong Zou, Hangzhou, CN;
Zhiyang Wang, Hangzhou, CN;
Sheng Huang, Hangzhou, CN;
Qi Chen, Hangzhou, CN;
AMPLIPHY TECHNOLOGIES LIMITED, Hangzhou, CN;
Abstract
A fully-differential two-stage operational amplifier circuit is provided, and it includes a first-stage amplification circuit, a second-stage amplification circuit, a common-mode signal acquisition circuit, a common-mode feedback circuit and a bias circuit. The first-stage amplification circuit has a telescopic structure and receives differential input signals INand IN. The second-stage amplification circuit has a common-source structure and outputs differential output signals OUTand OUT. The common-mode signal acquisition circuit receives differential output signals, and outputs an operational amplifier output common-mode signal V. The common-mode feedback circuit outputs common-mode feedback signals VBand VBto the first-stage amplifier circuit and the second-stage amplifier circuit respectively; The bias circuit outputs a bias voltage VBto the first-stage amplifier circuit, and outputs bias voltages VBand VBto the first-stage amplifier circuit respectively.