D/A and A/D converters utilizing weighted impedances

Details D/A and A/D converters utilizing weighted impedances D/A and A/D converters utilizing weighted impedances

1990-08-13

1992-02-25

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341165, H03M 180

Patent

active

050917285

ABSTRACT:
An apparatus for converting the sum of m digital signals to an analog signal utilizing resistors and switches only. The operating time of the apparatus is the time required to pass the signal through a single switch. This invention can also be utilized in an A/D converter for converting the difference between an analog signal and several digital signals to a digital signal without using extra time to compute the subtraction.

REFERENCES:
patent: 4293848 (1981-10-01), Cheng et al.
patent: 4354175 (1982-10-01), Goldstein
"Integrated Electronics: Analog and Digital Circuits and Systems", Millman and Halkias, (1972) McGraw-Hill Book Co., New York, N.Y., pp. 662 and 664.
"Data Conversion/Acquisition Data Book", National Semiconductor, 1980, pp. 5-1 and 7-3.

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