Low voltage, single power supply operated digital analog convert

Details Low voltage, single power supply operated digital analog convert Low voltage, single power supply operated digital analog convert

1985-10-21

1987-02-17

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03M 168

Patent

active

046443258

ABSTRACT:
A digital to analog converter circuit includes a current supply for providing a plurality of output currents of substantially equal magnitudes, a subtractor circuit coupled with selective outputs of the current supply for producing a plurality of binary weighted output currents and a summing circuit which is responsive to a binary coded digital input signal for selectively summing the binary weighted output currents and the remaining equal magnitude currents to provide a representative analog output current. The converter circuit is suited to be operated from a single source of power supply and does not require resistor trimming.

REFERENCES:
patent: 3474440 (1969-10-01), Schmid
patent: 4292625 (1981-09-01), Schoeff
patent: 4338592 (1982-07-01), Wilensky
patent: 4492954 (1985-01-01), Harris
patent: 4539552 (1985-09-01), Davis
McGlinchey "IEEE International Solid-State Circuits Conference Digest of Technical Papers", Feb. 10, 1982, pp. 80-81 and 296-297.

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