Patent ID: 8811635
Filing Date: 2014-08-19
Classification: H04R

Abstract:
1. A semiconductor microphone, comprising: a silicon substrate having a perimeter; an N-well diffused into the silicon substrate at the perimeter; a deformable diaphragm disposed over at least a portion of the silicon substrate and in contact with at least a portion of the perimeter; and a signal channel in electrical communication with the deformable diaphragm, the signal channel comprising a microphone output channel and a feedback output channel, wherein the deformable diaphragm produces an electric signal on the signal channel in response to deformation of the deformable diaphragm, and wherein a portion of the electric signal is transmitted on the feedback output channel to the N-well to change a voltage of the N-well to at least partially compensate a parasitic capacitance on the deformable diaphragm.