Optical receiver and optical transmission system

摘要

Disclosed herein is an optical receiver including: a light receiving element configured to have an anode and a cathode and generate a photocurrent dependent on received signal light; a current-voltage conversion circuit configured to be connected to the anode of the light receiving element and convert the photocurrent to a voltage signal; and a capacitive passive element configured to have a first electrode and a second electrode. The cathode of the light receiving element is connected to the first electrode of the capacitive passive element, and the second electrode of the capacitive passive element is connected to a reference potential of the current-voltage conversion circuit and the second electrode is not coupled to objects other than a reference potential terminal of the current-voltage conversion circuit.

主权项

1. An optical receiver comprising:
a light receiving element configured to have an anode and a cathode and generate a photocurrent dependent on received signal light; a current-voltage conversion circuit configured to be connected to the anode of the light receiving element and convert the photocurrent to a voltage signal; and a capacitive passive element configured to have a first electrode and a second electrode, wherein the cathode of the light receiving element is connected to the first electrode of the capacitive passive element, and the second electrode of the capacitive passive element is connected to a reference potential of the current-voltage conversion circuit and the second electrode is not coupled to objects other than a reference potential terminal of the current-voltage conversion circuit, wherein the current-voltage conversion circuit includes
a first terminal connected to the anode of the light receiving element,a second terminal connected to the second electrode of the capacitive passive element,a power supply terminal connected to a power supply potential, andthe reference potential terminal connected to the reference potential, and the second terminal is connected to the reference potential terminal via a connection path contained within the current-voltage conversion circuit, wherein the second electrode of the capacitive passive element is directly connected to the second terminal, is indirectly connected to the reference potential terminal via the connection path, and is not directly connected to the reference potential terminal.