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

Claim 20:
21. A method for suppressing inversion of an output of an integrator in a preamplifier for optical reception, the method comprising:
receiving and amplifying a current based on an input current from a light receiving element configured to receive an optical signal in a burst state;
removing an offset current included in the input current and releasing a part of the input current, on the basis of an output obtained through amplification and a reference voltage; and
integrating, by the integrator, the output 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.