公开(公告)号：US20190372539A1

公开(公告)日：2019-12-05

申请号：US16428413

申请日：2019-05-31

Applicant: STMicroelectronics S.A.

Inventor： Renald Boulestin

IPC: H03G3/30 ,  H03F3/19 ,  H03K5/24 ,  H04B1/06

Abstract: A variable gain amplifier includes a pair of amplification and recentering branches. Each branch includes: a resistive element of variable resistance configured to be driven by a variable gain controller; a digitally-driven variable current source configured to be driven by a compensation current driver unit; a first transistor comprising a gate terminal coupled to an input terminal of the variable gain amplifier, and a source terminal coupled to a first terminal of the resistive element; and a second transistor comprising a gate terminal coupled to a drain terminal of the first transistor, and a source terminal coupled to an output terminal of the variable gain amplifier.

公开(公告)号：US10727799B2

公开(公告)日：2020-07-28

申请号：US16428413

申请日：2019-05-31

Applicant: STMicroelectronics S.A.

Inventor： Renald Boulestin

IPC: H03G3/30 ,  H03F3/19 ,  H03K5/24 ,  H04B1/06

Abstract: A variable gain amplifier includes a pair of amplification and recentering branches. Each branch includes: a resistive element of variable resistance configured to be driven by a variable gain controller; a digitally-driven variable current source configured to be driven by a compensation current driver unit; a first transistor comprising a gate terminal coupled to an input terminal of the variable gain amplifier, and a source terminal coupled to a first terminal of the resistive element; and a second transistor comprising a gate terminal coupled to a drain terminal of the first transistor, and a source terminal coupled to an output terminal of the variable gain amplifier.