De-glitch circuitry for video game memories

Details De-glitch circuitry for video game memories De-glitch circuitry for video game memories

1983-02-02

1986-07-08

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307530, 307543, 307568, 307574, H03K 1716, H03K 17284

Patent

active

045995257

ABSTRACT:
De-glitch circuitry selectively responds to the time duration of actuation signals for selecting between pages in a read only memory. The de-glitch circuitry uses MOSFET transistors to act as resistors and capacitors in order to provide an RC time constant. The RC time constant is selected to allow the de-glitch circuitry to eliminate spurious glitches and prevent unwanted segment selections in the memory. The de-glitch circuitry is used with a voltage reference generator, segment selection decoders, sense amplifiers, and a flip-flop; all of which are constructed of MOSFET transistors and incorporated in a read only memory integrated circuit chip. The de-glitch circuitry is particularly useful in the construction of program cartridges for video game computer systems.

REFERENCES:
patent: 3138759 (1964-06-01), Thompson
patent: 3277311 (1966-10-01), Merlen et al.
patent: 3906379 (1976-09-01), Tuhro
patent: 4287442 (1981-09-01), Spinks et al.
patent: 4368515 (1983-01-01), Nielsen
patent: 4430641 (1984-02-01), Baur et al.

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