Analog to digital converter

Details Analog to digital converter Analog to digital converter

1988-09-23

1990-07-03

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341155, 341160, H03M 136

Patent

active

049395181

ABSTRACT:
In a cyclic averaging analog to digital converter, reference voltages having a plurality of levels, each of which is inputted to one of a plurality of comparators in a flash type analog to digital converter, are shifted cyclically by a small voltage, and the outputs of the flash type analog to digital converter are added for every shift cycle in order to obtain an output digital signal. The outputs of a voltage dividing circuit provide the reference voltages with N levels, the levels differing cyclically by a small voltage. The N reference voltages are divided into groups, each of which consists of M elements N/M, switches are provided each of which selects one of the reference voltages one after another for an associated group N/M reference voltages are thus selected by these switches and are supplied to the comparators.

REFERENCES:
patent: 3840807 (1974-10-01), Zschimmer
patent: 4742330 (1988-05-01), Doernberg et al.
patent: 4745393 (1988-05-01), Tsukada et al.
patent: 4763106 (1988-08-01), Gukzynski
patent: 4774498 (1988-09-01), Traa

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