Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1996-04-11
1997-07-08
DeBoer, Todd
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341150, H03M 112
Patent
active
056466226
ABSTRACT:
An analog/digital converter includes a comparator with two inputs and one output. One capacitor is connected between a reference potential and one of the inputs of the comparator. A coupling element is connected between a node point and the other of the inputs of the comparator. N further capacitors each have two terminals. One terminal of each of the further capacitors is connected to the node point. N individually controllable reversing switches each connect the other terminal of a respective one of the further capacitors to an input potential, a first reference potential or a second reference potential. A control device is connected to the output of the comparator and to the reversing switches to control the reversing switches for connecting at least some of the further capacitors to the input potential and for connecting each of the remainder of the further capacitors to one of the two reference potentials, during a transfer phase. The reversing switches include at least some reversing switches having switch positions alternating continuously among one another between the reference potentials until an appearance of a signal change at the output of the comparator, and remaining reversing switches each connecting a respective one of the capacitors to a respective one of the two reference potentials, during a conversion phase.
REFERENCES:
patent: 4404544 (1983-09-01), Dwarakanath
patent: 4742330 (1988-05-01), Doernberg et al.
DeBoer Todd
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
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