Arent Fox LLP
Noise detection circuit, noise detection method, and print recognition apparatus
Disclosed are a noise detection circuit, a noise detection method, and a print recognition apparatus. The noise detection circuit includes a differential amplifier, an analog-to-digital converter, a control circuit, and a first switch circuit; the control circuit is configured to control the first switch circuit to make the first input signal terminal connected with the reference signal terminal or grounded, and to make the second input signal terminal connected with the reference signal terminal or grounded, and when the first input signal terminal is connected with the reference signal terminal or grounded, and the second input signal terminal is connected with the reference signal terminal or grounded, to analyze the digital signal output by the analog-to-digital converter to determine a source of noise of the print recognition apparatus.
BOE Technology Group Co., Lid.
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G06K H03M H03K G06V G11C G06V G06V G06V
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Xueyou Yanling Pengpeng Wei Ping Xiaoliang Haisheng Chih-Jen
Cao Han Wang Liu Zhang Ding Wang Cheng