Combination of an analog to digital converter with a sampling sw

Details Combination of an analog to digital converter with a sampling sw Combination of an analog to digital converter with a sampling sw

1981-11-03

1984-07-03

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, 340347M, H03K 1302

Patent

active

044582374

ABSTRACT:
An analog to digital converter is provided which includes a binary weighted capacitor array connected with a series of resistors structured as an array. The converter provides for charge correction to compensate for any capacitance deviation in the capacitor array. The converter includes a charge redistribution sequence under the control of a microcomputer to determine the digital value of the analog input using the resistor array to determine the least significant bit positions of the analog input. This same resistor array is also used to correct for capacitor value deviations in the binary weighted capacitor array.

REFERENCES:
Caves et al., A PCM Voice Codec with On-Chip Filters, IEEE Journal of Solid-State Circuits, vol. SC-14, No. 1, 2/1979, pp. 65-73.
Boyacigiller et al., An Error-Correcting 14b/20.mu.s CMOS A/D Converter, IEEE International Solid-State Circuits Conference, 1981, pp. 62 & 63.

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