Digital-to-analog converter

Details Digital-to-analog converter Digital-to-analog converter

1988-04-05

1990-02-27

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341141, 341146, H03M 176

Patent

active

049050060

ABSTRACT:
A digital-to-analog converter for converting a digital signal having a word length n into an analog signal comprises a series arrangement of at least two integrating circuits (1,2) and a control unit (18) for supplying a first and a second control signal (S1, S2) to the first and the second integrating circuit. The integrating circuits are adapted to perform an integration step under the influence of the first and the second control signal. The control unit is adapted to generate, in this order, the first control signal M1 times, the second control signal M2 times, the first control signal M3 times and the second control signal M4 times. For converting arbitrary digital signals M2+M4 is equal to a constant (k). Due to this measure an offset voltage which is independent of the value of the n-bit digital signal to be converted is produced at the output (8) of the converter. For converting n-bit digital signal the constant k is preferably taken to be equal to 2.sup.p in which p.ltoreq.n.

REFERENCES:
patent: 4517551 (1985-05-01), Cambell, Jr.
patent: 4661802 (1987-04-01), Yukawa
patent: 4763108 (1988-08-01), Kobayashi

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