Weighted capacitor analogue-digital converters

Details Weighted capacitor analogue-digital converters Weighted capacitor analogue-digital converters

1981-08-17

1985-05-14

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347C, 340347M, H03K 1302, H03K 1317

Patent

active

045175497

ABSTRACT:
In an analogue-digital converter of the type having a comparator, an array of capacitors having different capacities, one terminal of the capacitors being connected to one input terminal of the comparator, a plurality of switches for connecting the capacitors, except a first one of them, to an analogue signal input terminal or a source of reference voltage, there are provided a resistance voltage divider having a mid tap and connected between the source of reference voltage and ground, and a transfer switch for connecting the first capacitor to the analogue signal input terminal or to the mid tap of the resistance voltage divider, the mid tap thereof being connected to the other input terminal of the comparator.

REFERENCES:
patent: 4200863 (1980-04-01), Hodges et al.
patent: 4380756 (1983-04-01), Worsman
patent: 4388612 (1983-06-01), Takagi et al.
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.
"ALL-MOS Charge Redistribution Analog-to-Digital Conversion Techniques--Part I and II", EEE Journal of Solid-State Circuits, vol. SC-10, No. 6, Dec. 1975.

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