公开(公告)号：US20140292411A1

公开(公告)日：2014-10-02

申请号：US14304589

申请日：2014-06-13

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics, S.r.l.

Inventor： MarcoOrazio CAVALLARO ,  Serge RAMET ,  Tiziano CHIARILLO

IPC: H03F3/45

CPC classification number: H03F3/45179 ,  H03F1/308 ,  H03F3/3013 ,  H03F3/45183 ,  H03F2203/45054

Abstract: A class AB operational amplifier includes an input stage, an output stage and a level shifter stage to control the quiescent current of the output stage and to transfer the signal from the input stage to the output stage, and a control circuit of the level shifter stage. The control circuit includes a transistor differential pair having a differential input terminals and the differential voltage at the differential terminals of the differential pair controls the level shifter stage.

Abstract translation: AB类运算放大器包括输入级，输出级和电平移位级，以控制输出级的静态电流并将信号从输入级传送到输出级，以及电平转换级的控制电路 。 控制电路包括具有差分输入端的晶体管差分对，差分对的差分端的差分电压控制电平转换级。