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:
Oct. 07, 2014
Filed:
Nov. 15, 2012
Stmicroelectronics (Grenoble 2) Sas, Grenoble, FR;
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Marco Orazio Cavallaro, Catania, IT;
Serge Ramet, Jarrie, FR;
Tiziano Chiarillo, Tremestieri Etnea, IT;
STMicroelectronics (Grenoble 2) SAS, Grenoble, FR;
STMicroelectronics S.r.l., Agrate Brianza (MB), IT;
Abstract
A fully differential operational amplifier includes a differential input stage, at least one output stage and a common-mode feedback circuit connected with the input stage. The differential input stage includes a differential pair of transistors and a bias circuit for the differential pair of transistors. A start-up circuit operates to detect an operating condition of the differential pair of transistors of the input stage and in response thereto turn on the bias circuit.