Digital-to-analog converter having resistor networks

Details Digital-to-analog converter having resistor networks Digital-to-analog converter having resistor networks

1992-06-17

1993-10-12

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341154, H03M 168

Patent

active

052529754

ABSTRACT:
A D/A converter includes a first resistor network including K resistors each having a resistance, where K is an integer, and a second resistor network including L resistors connected in series where L is an integer. The sum of resistances of the L resistors is approximately equal to the resistance of each of the K resistors. The D/A converter further includes a first switching part, coupled to the K resistors, for selecting (K-1) resistors among the K resistors in accordance with a digital input signal and for forming a series circuit including the (K-1) resistors and the second resistor network connected in series, first and second voltages being applied to respective ends of the series circuit. Furthermore, the D/A converter includes a second switching part, coupled to the second series circuit, for connecting one of the L resistors to an output terminal of the D/A converter.

REFERENCES:
patent: 3997892 (1976-12-01), Susset
patent: 4638303 (1987-01-01), Masuda et al.
patent: 4918448 (1990-04-01), Hauviller et al.
patent: 5059978 (1991-10-01), Valdenaire
patent: 5079552 (1992-01-01), Pelgrom et al.
patent: 5126740 (1992-06-01), Kawada
patent: 5175548 (1992-12-01), Kawada

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