Invention Application
WO2017044386A1 HALF-BRIDGE FINGERPRINT SENSING METHOD 审中-公开
半桥指纹感测方法

HALF-BRIDGE FINGERPRINT SENSING METHOD
Abstract:
Fingerprint detection circuits with common mode noise rejection are described. The Fingerprint detection circuit includes a half-bridge circuit coupled to a receive (RX) electrode of an array of fingerprint detection electrodes and to a buried capacitance that is unalterable by the presence of a conductive object on the array. The fingerprint detection circuit may also include a listener electrode configured to enable common mode noise rejection through a differential input stage of a low noise amplifier (LNA).
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