Analogue-to-digital converter

Details Analogue-to-digital converter Analogue-to-digital converter

1990-08-14

1991-05-28

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Bipolar

341168, H03M 150

Patent

active

050198173

ABSTRACT:
A multiple ramp analogue-to-digital converter comprises an integrator connected to receive and integrate an analogue input signal to be converted, and an opposing coarse reference signal. Instead of these signals being applied to the integrator sequentially, as is conventional, they are applied simultaneously. A flash converter is used to provide a rough initial estimate of the magnitude and polarity of the analogue input signal, so that the duration of application of the coarse reference signal can be estimated in advance. A fine reference signal is then applied to the integrator to restore its output to zero and improve the resolution of the conversion.

REFERENCES:
patent: Re29992 (1979-05-01), Wold
patent: 3737893 (1973-06-01), Belet et al.
patent: 3906486 (1975-09-01), Phillips
patent: 4485372 (1984-11-01), Holloway

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