Digital to analog converter with improved companding

Details Digital to analog converter with improved companding Digital to analog converter with improved companding

1975-02-04

1976-12-14

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, 179 15AV, H03K 1302

Patent

active

039978923

ABSTRACT:
A digital to analog converter includes nonlinear and linear cascaded resistive voltage dividers the nonlinear divider having its resistors valued to approximate a desired transfer characteristic. The high order bits of the digital input code select a predetermined resistor of the nonlinear divider and place the voltage across such resistor across the linear resistive divider the lower order bits of the code thereafter selecting a point on the linear divider which provides an analog value equivalent to the digital input code.

REFERENCES:
patent: 3298014 (1967-01-01), Stephenson
patent: 3562743 (1971-02-01), Le Rouge et al.
patent: 3573795 (1971-04-01), Bowers et al.
patent: 3626408 (1971-12-01), Carbrey
patent: 3646548 (1972-02-01), Van Doren
Gryzbowski et al., "Nonlinear Functions from D/A . . . ," Electronic Engineering, 7/1971, pp. 48-51.
Schmid, "Electronic Analog/Digital . . . ," Van Nostrand Reinhold Co., 1970, pp. 8-10.

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