Control signal generation circuit for wireless remote control si

Details Control signal generation circuit for wireless remote control si Control signal generation circuit for wireless remote control si

1988-04-19

1991-10-22

Oberley, Alvin E.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

34082556, H04Q 900

Patent

active

050599755

ABSTRACT:
A control signal generator is disclosed, which is used in a remote control signal transmitter for controlling the circuit operation of an instrument. The generator includes a plurality of key output terminals from which scan signals are outputted and a level detection circuit detecting a level at each key output terminal. The selected one or ones of the key output terminal are coupled to a potential source and the level detection circuit detects the level at the key output terminal during a period except for the scan signal output period, so that a plurality of kinds of custom codes each used for designating the instrument to be controlled are produced by changing the terminal coupled to the potential source and/or by increasing or decreasing its number.

REFERENCES:
patent: 4271404 (1981-06-01), Tanaka
patent: 4412218 (1983-10-01), Niitsu
Holt et al, "Keyboard Using Elastic Diaphram Switches", IBM Technical Disclosure Bulletin, vol. 14, No. 8, Jan. 1972, p. 2277.

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