Conductive touch pad with capacitive blocking filter

Details Conductive touch pad with capacitive blocking filter Conductive touch pad with capacitive blocking filter

1994-09-30

1996-03-12

Peng, John K.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 26, G06F 314

Patent

active

054990262

ABSTRACT:
A touch sensitive pad consists of a number of electrical conductive pads (10) surrounded by a conductive pad (11). Each pad (10) is connected via a respective capacitive blocking filter to a multiplexer (13) and an oscillator (14). When the touch pad is touched directly to effectively bridge between one of the pads (10) and the surrounding pad (11), a change in effective impedance is detected by a resultant variation in the frequency of the oscillator (14).

REFERENCES:
patent: 4441034 (1984-04-01), Iten
patent: 4924222 (1990-05-01), Antikidis et al.
patent: 4954823 (1990-09-01), Binstead
patent: 5012124 (1991-04-01), Hollaway

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