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

Claim 0:
1. An optical reception device configured to receive an optical signal in a burst state, the optical reception device comprising:
a light receiving element configured to receive the optical signal;
an amplifier configured to receive and amplify a current based on an input current from the light receiving element;
a direct-current adjustment circuit connected to an input electric path extending from the light receiving element to the amplifier, the direct-current adjustment circuit being configured to remove an offset current included in the input current;
an alternating-current adjustment circuit connected to the input electric path and configured to cause a part of the input current to flow therein; and
a controller configured to control the direct-current adjustment circuit and the alternating-current adjustment circuit on the basis of an output of the amplifier and a reference voltage, wherein
the controller includes
an integrator configured to integrate the output of the amplifier and output a resultant output to two electric paths of a positive phase and a negative phase, and
an inversion suppression circuit configured to operate so as to inject a current to the positive phase and extract a current from the negative phase when a negative phase potential of the output of the integrator is higher than a positive phase potential thereof.