Integrated digital/analog converter

Details Integrated digital/analog converter Integrated digital/analog converter

1984-01-09

1986-01-07

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1302

Patent

active

045636699

ABSTRACT:
A D/A converter that operates according to the parallel method, in which each of the conversion stages assigned to a given bit of the digital word to be converted has, in the conventional manner a current source that delivers a weighted constant current and an electronic switch with an output which is applied to the common output of the converter and which is controlled according to the command given by the control bit assigned to each particular stage. In order to prevent the errors in the output signal that occur in the customary D/A converters of this kind as a result of the differing response times of individual switches, each individual switching stage is controlled by a differential signal, in which the switching time for the rising edges is adjusted to be different from that for the falling edges. The source for the differential signal consists of an ECL flip-flop with another differential stage, which operates with the same load resistances as the flip-flop, in which case an additional direct current is introduced in the differential signal.

REFERENCES:
patent: 4383248 (1983-05-01), Smith

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