Invention Application
- Patent Title: AMPLIFIER CIRCUIT, CORRESPONDING DEVICE AND METHOD
-
Application No.: US17720502Application Date: 2022-04-14
-
Publication No.: US20220337198A1Publication Date: 2022-10-20
- Inventor: Alessandro BERTOLINI , Germano NICOLLINI
- Applicant: STMicroelectronics S.r.l.
- Applicant Address: IT Agrate Brianza (MB)
- Assignee: STMicroelectronics S.r.l.
- Current Assignee: STMicroelectronics S.r.l.
- Current Assignee Address: IT Agrate Brianza (MB)
- Priority: IT102021000009653 20210416
- Main IPC: H03F1/30
- IPC: H03F1/30 ; H03F3/04

Abstract:
An amplifier circuit includes a first input stage with a differential input transistor pair and a second gain stage having an output node coupled to a load. A node in the first gain stage is coupled to the output node in the second gain stage. A feedback line couples the output node to the control node of a first transistor of the differential input transistor pair. Current mirror circuitry is coupled to a current flow path through a further transistor in the second gain stage and includes a sensing node configured to produce a sensing signal indicative of the current supplied to the load. The sensing signal at the sensing node is directly fed back to the control node of the first transistor of the differential input transistor pair to provide a zero in the loop transfer function that is matched to and tracks and cancels out a load-dependent pole.
Public/Granted literature
- US12267047B2 Amplifier circuit, corresponding device and method Public/Granted day:2025-04-01
Information query