Digital signal receiver circuit

摘要: An optical signal is converted by a light-receiving element into photoelectric current. The current preamplifier positive phase voltage and the opposite voltage. peaks of output are sensed held first second peak sensing circuits. median between circuit determined circuit. A level comparison compares outputs circuits produces with constant amplitude within specific input range, thereby producing reception signal. This helps alleviate duty fluctuations deterioration sensitivity resulting from dark or in offset preamplifier.