Analog-to-digital converter with scaling of input signal

Details Analog-to-digital converter with scaling of input signal Analog-to-digital converter with scaling of input signal

1985-03-29

1987-02-03

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03M 118

Patent

active

046411305

ABSTRACT:
A charge-redistribution successive-approximation analog-to-digital converter includes means for scaling an unknown analog input voltage (V.sub.IN) whose maximum rated value is greater than the precision reference voltage (V.sub.REF) of the converter. The unknown input voltage is applied to selected charge storing means, forming the charge-redistribution network, during a sampling interval. Subsequently, the charge on the selected charge storing means is distributed to additional charge storing means to produce the desired degree of scaling. The scaling factor is proportional to the ratio of V.sub.REF to the maximum rated value of V.sub.IN.

REFERENCES:
patent: 4348658 (1982-09-01), Carter
patent: 4381496 (1983-04-01), Carter
patent: 4404544 (1983-09-01), Dwarakanath
patent: 4517549 (1985-05-01), Tsukakoshi
"Capacitors Make Stable Converts" Jun. 7, 1979, p. 136, Electronics.
"Special Report: The Inside News on Data Converters" Jul. 17, 1980, pp. 101-112, Electronics.

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