Capacitive proximity switch and domestic appliance equipped...

Details Capacitive proximity switch and domestic appliance equipped... Capacitive proximity switch and domestic appliance equipped...

2006-08-14

2010-11-30

Nguyen, Hoai-An D (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S686000

Reexamination Certificate

active

07843200

ABSTRACT:
A capacitive proximity switch has an electrically conductive sensor surface, which is covered by an electrically non-conductive covering plate and which serves as a part of a capacitor having a capacitance that varies with proximity. The sensor surface is connected to a control input of a semiconductor switch that has a signal input with a clock signal and a signal output. A household appliance is equipped with the capacitive proximity switch. The signal output of the semiconductor switch has an output signal, which follows the clock signal and which has signal portions that are proportional to the capacitance of the capacitor formed with the sensor surface.

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