| 摘要 |
PROBLEM TO BE SOLVED: To provide a light receiving circuit which easily achieves both power consumption saving and adaption to various power supply voltages. SOLUTION: The light receiving circuit has a transimpedance amplifier circuit which is connected to a photoreceptor, a differential amplifier which is operated by a specified current supplied from a current source, and outputs a current corresponding to the differential signal between a signal outputted from the transimpedance amplifier circuit and a specified reference signal, a current mirror circuit which outputs a current corresponding to the current outputted from the differential amplifier, and a conversion element which converts the current outputted from the current mirror circuit to a voltage. COPYRIGHT: (C)2009,JPO&INPIT
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