| 摘要 |
An optical signal receiving circuit disclosed herein comprises: a first transimpedance amplifier configured to convert a first current signal into a first voltage signal, wherein the first current signal is generated in a first photodiode, to which an optical signal is inputted; a reference voltage generating circuit configured to generate a second voltage signal which is independent of the first voltage signal and which is a signal of a reference voltage; a level shift circuit configured to shift at least one of the first voltage signal and the second voltage signal in a close direction and output it, wherein the close direction is a direction in which the center voltage of the amplitude of the first voltage signal and the voltage of the second voltage signal get closer; and a differential amplifier which amplifies a difference between the first voltage signal and the second voltage signal.
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