Huawei Technologies Co., Limited

Lilin Xia

Xilin Wang

Honghai Zhang

This application provides an optical signal processing circuit and an electronic device, to improve a signal-to-noise ratio of an output signal of a fingerprint sensor, thereby improving a fingerprint recognition rate. The optical signal processing circuit includes a photosensitive device, an amplifier transistor T, a switch transistor T, a switch transistor T, a readout circuit, a control circuit, and a voltage-adjustable power supply. When the optical signal processing circuit is in a compensation reset phase, the voltage of the gate of Texactly reaches a level at which the amplifier transistor Tis turned on. Therefore, when an input voltage and a voltage increment are applied to the gate of T, a gate-source voltage Vgs of Tincreases, and Tamplifies an input voltage signal to generate an output signal.

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Shanghai, China

Lilin Xia