Patent ID: 11942998
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. An optical reception method for receiving an optical signal in a burst state, the optical reception method comprising, in a stage of preamplification:
receiving and amplifying, by an amplifier, a current based on an input current from a light receiving element configured to receive the optical signal;
removing an offset current included in the input current and releasing a part of the input current, on the basis of an output of the amplifier and a reference voltage; and
integrating, by an integrator, the output of the amplifier and outputting a resultant output to two electric paths of a positive phase and a negative phase, and when a negative phase potential of the output to the two electric paths is higher than a positive phase potential thereof, injecting a current to the positive phase and extracting a current from the negative phase.