Invention Grant
- Patent Title: Fully differential operational amplifier with common-mode feedback circuit
- Patent Title (中): 具有共模反馈电路的全差分运算放大器
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Application No.: US13677496Application Date: 2012-11-15
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Publication No.: US08854136B2Publication Date: 2014-10-07
- Inventor: Marco Orazio Cavallaro , Serge Ramet , Tiziano Chiarillo
- Applicant: STMicroelectronics (Grenoble 2) SAS , STMicroelectronics S.r.l.
- Applicant Address: FR Grenoble IT Agrate Brianza (MB)
- Assignee: STMicroelectronics (Grenoble 2) SAS,STMicroelectronics S.r.l.
- Current Assignee: STMicroelectronics (Grenoble 2) SAS,STMicroelectronics S.r.l.
- Current Assignee Address: FR Grenoble IT Agrate Brianza (MB)
- Agency: Gardere Wynne Sewell LLP
- Priority: ITMI2011A2100 20111118
- Main IPC: H03F3/45
- IPC: H03F3/45
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.
Public/Granted literature
- US20130127536A1 FULLY DIFFERENTIAL OPERATIONAL AMPLIFIER WITH COMMON-MODE FEEDBACK CIRCUIT Public/Granted day:2013-05-23
Information query
