Digital-to-analog converter with improved compensation arrangeme

Details Digital-to-analog converter with improved compensation arrangeme Digital-to-analog converter with improved compensation arrangeme

1980-07-30

1982-09-14

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, 340347M, H03K 1302

Patent

active

043498116

ABSTRACT:
A digital-to-analog converter comprising a plurality of identical transistor current sources with their emitters connected to respective shunt legs of an R-2R ladder network for establishing binary weighting of the transistor currents. The effects of variations in transistor offset voltage are compensated for by returning the ladder termination resistor to a voltage which is 2(kT/q)1n 2 more positive than the last active stage of the converter.

REFERENCES:
patent: 3940760 (1976-02-01), Brokaw
patent: 4176344 (1979-11-01), Saari et al.

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