Patent ID: 9498181
Filing Date: 2016-11-22
CPC Classification: A61B,H01L

Claim Text:
1. A sensor comprising: a sensor plate; a base piece; and a first sensor membrane and a second sensor membrane, each having a side of positive electrical polarity and a side of negative electrical polarity; wherein each one of the first sensor membrane and the second sensor membrane is mounted between the sensor plate and the base piece while allowing movement of the sensor plate in a direction that is parallel to the base piece; and wherein the first sensor membrane and the second sensor membrane are mounted with opposing polarities such that their respective sides of positive electrical polarity face each other or face away from each other; a summing amplifier with a first input coupled to the first sensor membrane and a second input coupled to the second sensor membrane; whereby because of the opposing polarities of the first and second sensor membranes, when the sensor plate moves in the direction that is parallel to the base piece, signals generated by the first and second sensor membranes cancel each other out when combined by the summing amplifier, and when the sensor plate moves in a desired direction of sensing that is perpendicular to the sensing plate, the signals generated by the first and second sensor membranes are summed to produce an increased output from the summing amplifier.