公开(公告)号：US20180234096A1

公开(公告)日：2018-08-16

申请号：US15749370

申请日：2015-07-31

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Cheng LI ,  Kunzhi YU ,  Marco FIORENTINO ,  Raymond G BEAUSOLEIL

IPC: H03K17/78 ,  H03F3/08 ,  H04B10/69 ,  H03K17/94 ,  G01J1/44

CPC classification number: H03K17/78 ,  G01J1/44 ,  H03F3/082 ,  H03K17/941 ,  H04B10/6931

Abstract: In one example, a device includes a photodetector to generate an electrical signal in response to an optical signal and a transimpedance amplifier unit to receive the electrical signal. In one example, the transimpedance amplifier unit may include a first inverter unit, a second inverter unit coupled to the first inverter unit, and a third inverter unit coupled to the second inverter unit. In one example the third inverter unit may include a feedback resistor and a first n-type transistor in parallel to the feedback resistor, where the first n-type transistor is to provide a variable gain of the third inverter unit.