公开(公告)号：WO2019089394A1

公开(公告)日：2019-05-09

申请号：PCT/US2018/057868

申请日：2018-10-26

申请人： FINISAR CORPORATION

发明人： RAY, Sagar

IPC分类号： H04B10/69 ,  H03F3/45

摘要： A circuit and method in an amplifier circuit for filtering a DC offset in differential input signals and inserting a programmable adjustable crosspoint offset in differential output signals. An amplifier circuit includes a differential amplifier circuit configured to amplify differential input signals into differential output signal. The amplifier circuit further includes a feedback circuit coupled between the differential output signals and the differential input signals. The feedback circuit is configured to generate a programmably adjustable crosspoint offset in the differential output signal and a programmably adjustable cutoff frequency of the feedback circuit. An amplifier method includes amplifying differential input signals into differential output signals, generating a programmably adjustable crosspoint offset in the differential output signal, and generating a programmably adjustable cutoff frequency of a feedback circuit between the differential output signals and the differential input signals.