Fully parallel threshold type analog-to-digital converter

Details Fully parallel threshold type analog-to-digital converter Fully parallel threshold type analog-to-digital converter

1980-02-22

1983-11-22

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, H03K 1303

Patent

active

044172338

ABSTRACT:
A parallel type A/D converter capable of operating at an extremely high speed with a high degree of accuracy and with low power consumption. A plurality of comparators each having a reference voltage corresponding to an assigned quantizing level are disposed in parallel with each other and divided into a plurality of comparator blocks or groups. A plurality of sub-comparators are provided so that prior to the comparison of the input signal by the comparators, the input signal is first compared with the reference voltages of the sub-comparators and in response to the output from the sub-comparator having the reference voltage comparable or corresponding to the incoming input signal, only the comparators in the comparator block or group associated with said sub-comparator are energized or enabled while the remaining comparators are kept de-energized or disabled, whereby a minimum power consumption may be attained.

REFERENCES:
patent: 3597761 (1971-08-01), Fraschilla et al.
patent: 3737894 (1973-06-01), Poretti et al.
patent: 3935569 (1976-01-01), Marcel et al.
patent: 4143366 (1979-03-01), Lewis, Jr.
patent: 4233667 (1980-11-01), Devine et al.
The Engineering Staff of The Digital Equipment Corp., Analog-Digital Conversion Handbook, 1964, pp. 20-23.
Breuer, High-Speed A/D Converter Monolithic Techniques, 1972 IEEE International Solid-State Circuits Conference, pp. 146-147.
Kervhner et al., Alternating-Current Circuits, John Wiley & Sons, 1938, pp. 19, 20 & 129.

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