Process for the digital to analog conversion of digital informat

Details Process for the digital to analog conversion of digital informat Process for the digital to analog conversion of digital informat

1986-09-12

1989-08-01

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341144, 341154, H03M 178

Patent

active

048536989

ABSTRACT:
In a process of digital to analog conversion, use is made of a network comprising capacitors (C through C'/16) which are binary-stepped in their capacitance, and whose lower terminals, depending upon the binary value of the allocated bit of a digital signal to be converted, are switchable to a reference voltage source (V.sub.ref) or to ground potential and thus either codetermine or do not codetermine the value of the network output voltage representing the analog signal. In order to achieve a monotonic and possibly linear converter characteristic when converting into bipolar signals, the network is so switched that, when generating positive and negative analog values of the same order, it always involves the same capacitors, and no additional capacitor is required for change redistribution.

REFERENCES:
patent: 4380756 (1983-04-01), Worsman
patent: 4667179 (1987-05-01), Law et al.
McCreary et al, All-MOS Charge Redistribution Analog-to-Digital . . . , IEEE Journal of Solid-State Circuits, vol. SC-10, No. 6, 12/1975, pp. 371-379.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. II-16 to II-27; II-46 to II-48.
Timbie et al, Principles of Electrical Engineering, John Wiley & Sons, Inc., 1922, pp. 309-311.

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