公开(公告)号：US20250141583A1

公开(公告)日：2025-05-01

申请号：US18494006

申请日：2023-10-25

Applicant: Cisco Technology, Inc.

Inventor： Scott D. DENTON ,  Joseph J. BALARDETA

IPC: H04J14/02 ,  H04Q11/00

Abstract: The present disclosure relates to an optical module and a method of operating the optical module. The optical module includes transmission channels and a monitor channel. The transmission channels produce a plurality of optical signals. Each transmission channel includes an equalizer circuit and a first converter. The equalizer circuit adjusts a received electrical signal to produce an adjusted electrical signal, and the first converter converts the adjusted electrical signal into the optical signal produced by the respective transmission channel. The monitor channel includes an optical multiplexer, a second converter, and a processing circuit. The optical multiplexer selects a first optical signal produced by a first transmission channel of the plurality of transmission channels. The second converter converts the first optical signal into a first electrical signal. The processing circuit adjusts a first equalizer circuit of the first transmission channel. Adjusting the first equalizer circuit adjusts the first optical signal.

公开(公告)号：US20230122287A1

公开(公告)日：2023-04-20

申请号：US17451574

申请日：2021-10-20

Applicant: Cisco Technology, Inc.

Inventor： Mehmet M. EKER ,  Simon S. PANG ,  Joseph J. BALARDETA

IPC: H03F3/08 ,  H03F3/45

Abstract: A differential transimpedance amplifier (DTIA) includes a first input, a second input, a first output, and a second output. The DTIA also includes a first inverter and a second inverter connected in series to the first input. The DTIA further includes a third inverter and a fourth inverter connected in series to the second input. The first inverter and the fourth inverter receive a first supply voltage from a first voltage regulator. The second inverter and the third inverter receive a second supply voltage from a second voltage regulator. The first supply voltage changes (i) based on a difference between voltages on the first output and the second output and (ii) while the second supply voltage remains fixed.