Cauwenberghs, Gert,Sullivan, Thomas J.,Deiss, Stephen R.
申请号：
AU2008329623
公开号：
AU2008329623B2
申请日:
2008.11.26
申请国别(地区):
AU
年份:
2014
代理人:
摘要：
A capacitive sensor system including a sensing plate, an amplifier, and a switchingcircuit is described. The sensing plate is capacitively coupled to a body surface.A change in the electric potential on the body surface generates an electric fieldthat induces change in the electric potential of the sensing plate. The sensingplate includes a sensing node positioned in the electric field for generatingan input signal from the electric field. The sensing plate is not in contact withthe body surface. The amplifier receives the input signal at the input port, amplifiesthe input signal and generates an output signal at the output port. The switchingcircuit is connected to the input port and a reference voltage. The switchingcircuit non-continuously closes a shunting path from the sensing node to thereference voltage to reset the voltage at the sensing node.
