Touch sensitive electronic switching circuitry for electronic wr

Details Touch sensitive electronic switching circuitry for electronic wr Touch sensitive electronic switching circuitry for electronic wr

1976-03-05

1978-07-04

Anagnos, Larry N.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

58 23A, 307304, 361 56, 361 58, H03K 3353, H02H 904, G04B 1900

Patent

active

040990745

ABSTRACT:
In a touch sensitive electronic switching circuit including a C-MOS inverter, for use in an electronic wristwatch, a resistor of about 5 M.OMEGA. is connected between the gate electrode of the C-MOS inverter and an input terminal associated with a touch sensitive electrode formed on a preferred position of the casing of the electronic wristwatch. The resistor of about 5 M.OMEGA. functions to prevent the C-MOS inverter from being damaged by an erroneous application of a high voltage to the touch sensitive electrode.

REFERENCES:
patent: RE27972 (1974-04-01), Borror et al.
patent: 3601625 (1971-08-01), Redwine et al.
patent: 3676742 (1972-07-01), Russell et al.
patent: 3712995 (1973-01-01), Steudel
patent: 3934159 (1976-01-01), Nomiya et al.
patent: 3947727 (1976-03-01), Stewart
RCA COS/MOS Integrated Circuits Manual; RCA/Solid State Division; 6/1972; pp. 30-33.

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