Received light level acquisition device, an optical receiver, optical communication system, the light-receiving level acquisition method and program

摘要

PROBLEM TO BE SOLVED: To provide a light reception level acquisition device and the like that have such a characteristic that it is possible to acquire a light reception level at high speed with high accuracy and also have superior economic efficiency.;SOLUTION: An output of a light receiving element 101 is connected to an emitter-side constant current source 1051 of a current-source-load-type emitter follower circuit 105 through a feedback resistor 106. A current obtained by subtracting a light reception current from a current of the constant current source 1051 becomes an emitter current of the current-source-load-type emitter follower circuit 105 at the time of optical signal reception. A current generation circuit 107 generates a collector current that is approximately equal to the emitter current. The current generated by the current generation circuit 107 is converted into a voltage signal by a current-voltage conversion circuit 108, is converted into a digital signal indicative of a voltage value by an AD converter 109, and is stored in a memory 111. A light reception level conversion part 112 converts the digital signal stored in the memory 111 to a light reception level and outputs a result of the conversion.;COPYRIGHT: (C)2013,JPO&INPIT