Patent ID: 9621279
Date: 2017-04-11
CPC Classifications: H03F,H04B,H04L

Claim:
1. An optical receiver circuit having a function of converting a differential optical signal into a differential current signal, comprising: a pair of light-receiving elements including first and second light-receiving elements configured to convert an optical signal into a current signal sent to a pair of signal lines, wherein an anode of the first light-receiving element and a cathode of the second light-receiving element are connected to a first signal line of the pair of signal lines via first and second AC coupling capacitors, respectively, wherein a cathode of the first light-receiving element and an anode of the second light-receiving element are connected to a second signal line of the pair of signal lines via third and fourth AC coupling capacitors, respectively, wherein differential signal currents are generated in the first and second signal lines in response to reception of differential optical signals inputted into the first and second light-receiving elements, wherein the first capacitor and the second capacitor are formed by a first three-layer capacitor having three electrodes in a stacking direction, wherein the third capacitor and the fourth capacitor are formed by a second three-layer capacitor having three electrodes in a stacking direction, and wherein intermediate electrodes of the first and second three-layer capacitors are connected to the first signal line and the second signal line, respectively.