| 摘要 |
A light reception circuit includes a direct current (DC) level shift circuit that shifts a DC voltage level of a first signal or a second signal and outputs a third signal or a fourth signal, or outputs both of the third signal and the fourth signal so that a DC voltage level of the first signal output from a cathode of a photodiode that generates a signal by photo conversion and a DC voltage level of the second signal output from an anode of the photodiode agree, and a differential amplifier that amplifies a difference between the third signal and the second signal, between the first signal and the fourth signal, or the third signal and the fourth signal, based on the third signal, the forth signal output from the DC level shift circuit, impedance of the DC level shift circuit being lower than input impedance of the differential amplifier. |
