公开(公告)号：US12081175B2

公开(公告)日：2024-09-03

申请号：US18318879

申请日：2023-05-17

申请人： HANGZHOU GEO-CHIP TECHNOLOGY CO., LTD.

发明人： Chun Geik Tan ,  Sy-Chyuan Hwu ,  Ruili Wu ,  Yang Yang

IPC分类号： H03F3/45 ,  H03F1/32

CPC分类号： H03F1/3205 ,  H03F3/45179 ,  H03F2200/451

摘要： An operational amplifier, any of a pair of amplification circuits of its output-stage amplification circuit unit comprises: a first and second transistors, a capacitor and a DC bias circuit; a control electrode of the first transistor is connected with a corresponding output terminal of a preceding-stage amplification circuit unit, a first electrode thereof is connected with a first power terminal and a second electrode thereof is connected with an output terminal of an amplification circuit of the output-stage amplification circuit unit; an output terminal of the DC bias circuit is connected with a control electrode of the second transistor, a first electrode of which is connected with a second power terminal, and a second electrode thereof is connected with the output terminal; both ends of the capacitor are respectively connected with the control electrodes of the first and second transistors; and the first and second transistors are of opposite polarities.