Digital display drive and voltage divider circuit

Details Digital display drive and voltage divider circuit Digital display drive and voltage divider circuit

1976-11-04

1979-09-18

Curtis, Marshall M.

Communications: electrical

Visual indication

Movable

340784, 340805, 307209, 307296R, G09F 932

Patent

active

041684982

ABSTRACT:
An improved interfacing circuit that is readily adapted to be integrated into the same circuit chip as the remaining circuitry in an electronic instrument having a digital display formed of passive display elements, and is adapted to deliver a plurality of discrete voltage levels to the digital display drive circuitry is provided. Specifically, a two-terminal voltage supply is provided for producing a first voltage level at a first terminal and a second voltage level at a second terminal. The interfacing circuit includes a voltage divider circuit having at least two series-coupled resistance circuits coupled intermediate the respective first and second terminals of the voltage supply so that the junction defined by the coupling of each pair of series-coupled resistance circuits and the first and second terminals of the voltage supply are respectively coupled to the digital display drive circuitry for delivering a plurality of discrete voltage levels thereto.

REFERENCES:
patent: 3207922 (1965-09-01), Gruodis et al.
patent: 3467952 (1969-09-01), Shiraishi et al.
patent: 3492496 (1970-01-01), Callan
patent: 3508084 (1970-04-01), Warner, Jr.
patent: 3936676 (1976-02-01), Fujita
patent: 3976362 (1976-08-01), Kawakami
patent: 4019178 (1977-04-01), Hashimoto et al.

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