公开(公告)号：EP3621199A1

公开(公告)日：2020-03-11

申请号：EP19196188.7

申请日：2019-09-09

申请人： Analog Devices, Inc.

发明人： GUIDRY, Michael

IPC分类号： H03F3/195 ,  H03F3/393 ,  H03F3/45

摘要： The present disclosure relates to a first stage of an instrumentation amplifier. The instrumentation amplifier comprises a pair of input amplifiers, each comprising an input transistor and a feedback current amplifier configured to amplify and feedback an error current from the input transistor. The arrangement may enable a current efficient solution where the amplifier can operate with very low input signals that are close to, or potentially below ground, without requiring a negative power supply voltage.