Invention Grant
- Patent Title: Variable gain RF amplifier
- Patent Title (中): 可变增益射频放大器
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Application No.: US12781518Application Date: 2010-05-17
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Publication No.: US08217719B2Publication Date: 2012-07-10
- Inventor: Olivier Touzard , Véronique Tournier
- Applicant: Olivier Touzard , Véronique Tournier
- Applicant Address: FR Montrouge
- Assignee: STMicroelectronics S.A.
- Current Assignee: STMicroelectronics S.A.
- Current Assignee Address: FR Montrouge
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: EP08305110 20080418
- Main IPC: H03F3/45
- IPC: H03F3/45

Abstract:
A variable gain amplifier having an input node, a variable current source including a control input coupled to the input node, first and second branches coupled in parallel between a first supply terminal and the variable current source, the first and second branches defining a differential pair arranged to be controlled by first and second differential gain signals and having first and second output terminals, one of the output terminals including an output node of the variable gain amplifier; and a potential divider having a middle node coupled to the first and second output terminals, wherein the middle node is also coupled to the input node by a capacitor.
Public/Granted literature
- US20100289583A1 VARIABLE GAIN RF AMPLIFIER Public/Granted day:2010-11-18
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