Patent ID: 7071455
Filing Date: 2006-07-04
Classification: H03F

Abstract:
1. An optical receiver, comprising: a photo diode for receiving signal light and generating a photo current corresponding to the signal light; a first current mirror circuit having a current path pair, the photo diode being connected to one current path; a second current mirror circuit having a current path pair, a first terminal, a second terminal, a third terminal and a fourth terminal, the first and second terminals being connected to one of the paired current paths at each end thereof, the third and fourth terminal being connected to the other of the paired current paths at each end thereof, the first terminal being connected to the other of the paired current paths of the first current mirror circuit; a signal detection circuit connected to the second terminal of the second current mirror circuit; a current monitor terminal connected to the third terminal of the second current mirror circuit and connectable to an external ammeter; and a voltage source connected to the third terminal of the second current mirror circuit for supplying a bias to the other of the paired current paths of the second current mirror circuits, wherein the voltage source includes a power supply and a diode connected to the power supply.