Keyboard encoder-decoder

Details Keyboard encoder-decoder Keyboard encoder-decoder

1979-10-01

1982-08-24

Groody, James J.

Communications: electrical

Audible indication

Percussion-type sound producer

178 17C, 340365E, G06F 302

Patent

active

043463690

ABSTRACT:
A keyboard encoder/decoder and method is provided for encoding on a keyboard output into a serial format data word representative of one and only one actuated key for transmission to an external device, and for decoding a serial format data word received from the external device. In a specific embodiment, a highest priority encoder output in parallel format is translated into a serial word format representative of one and only one actuated key. A repeat feature is also disclosed.

REFERENCES:
patent: 2871289 (1959-01-01), Cox et al.
patent: 3493928 (1970-02-01), Juliusburger
patent: 3623082 (1971-11-01), Stein et al.
patent: 3781874 (1973-12-01), Jennings
patent: 3928789 (1975-12-01), Elias
patent: 3932838 (1976-01-01), Sitter
patent: 4072820 (1978-02-01), Gunther
patent: 4170768 (1979-10-01), Kitagawa
Components Report XII, "Integrated Circuits", May 1977, No. 2, p. 54.

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