公开(公告)号：US20030214351A1

公开(公告)日：2003-11-20

申请号：US10356650

申请日：2003-01-31

Applicant: STMicroelectronics Pvt. Ltd.

Inventor： Tapas Nandy ,  Kirtiman Singh Rathore

IPC: H03F001/02 ,  H03F003/45

CPC classification number: H03F3/45753

Abstract: A method for reducing offset voltage in an operational amplifier without the need for switched-capacitors, includes introducing a tapped resistor chain between the common connected terminals of the transistors of the input differential pair of the operational amplifier and connecting the tail current source/sink of the differential amplifier to a selected tap of the resistor chain. The invention further provides an improved operational amplifier in accordance with the above method.

Abstract translation: 一种用于减少运算放大器中的失调电压而不需要开关电容的方法包括在运算放大器的输入差分对的晶体管的公共连接端子之间引入分接电阻器链，并将尾电流源/ 差分放大器到电阻链的选定分接头。 本发明还提供了一种根据上述方法的改进的运算放大器。