Subranging analog-to-digital converter with dither

Details Subranging analog-to-digital converter with dither Subranging analog-to-digital converter with dither

1990-10-05

1992-07-28

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Increasing converter resolution

341118, H03M 120

Patent

active

051343991

ABSTRACT:
Noise (dither) is introduced into a subranging analog-to-digital converter to enhance conversion accuracy. The resolution of the noise is sufficiently fine that its least significant bits can be changed without always changing the second pass approximation from the converter's internal analog-to-digital converter. Additional bits of statistical resolution can thereby be achieved without sacrificing the overlap between the dither word and the first pass digital approximation that is needed to provide dithered error correction.

REFERENCES:
patent: 4550309 (1985-10-01), Hiller et al.
patent: 4814767 (1989-03-01), Fernandes et al.
patent: 4903023 (1990-02-01), Evans et al.

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