Title:
BIOMETRIC SENSING DEVICE, ELECTRONIC DEVICE, AND COMMON-MODE INTERFERENCE DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/166155
Kind Code:
A1
Abstract:
Disclosed are a biometric sensing device, an electronic device, and a common-mode interference detection method. The biometric sensing device comprises a sensor array, a driver circuit, an analog front-end circuit, a sampling circuit, a reset circuit, a control circuit, and a processing circuit. When the biometric sensing device is executing common-mode interference detection, the control circuit controls the driver circuit not to output an excitation signal to the sensor array, controls the reset circuit to reset the sensor array and the analog front-end circuit, and, when the sensor array and the analog front-end circuit are reset, further controls the sampling circuit to sample at intervals a signal outputted by the analog front-end circuit; and the processing circuit determines whether common-mode interference is present in the biometric sensing device on the basis of the signal sampled by the sampling circuit.
Inventors:
LIN FENG (CN)
Application Number:
PCT/CN2017/101613
Publication Date:
September 20, 2018
Filing Date:
September 13, 2017
Export Citation:
Assignee:
SHENZHEN XINWEI TECH CO LTD (CN)
International Classes:
G06K9/00
Foreign References:
| CN206610309U | 2017-11-03 | |||
| CN107122703A | 2017-09-01 | |||
| CN106062775A | 2016-10-26 | |||
| CN103810479A | 2014-05-21 | |||
| US20150115981A1 | 2015-04-30 |
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