D.C. Stabilized analog-to-digital converter

Details D.C. Stabilized analog-to-digital converter D.C. Stabilized analog-to-digital converter

1979-01-19

1983-10-18

Miller, C. D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, H03K 1302

Patent

active

044108761

ABSTRACT:
A D.C. stabilized analog-to-digital converter of the type having a coarse converter responsive to a supplied analog signal for converting the analog signal to a coarse digital signal representation thereof, a reconverter for reconverting the coarse digital signal representation to a coarse analog signal and for determining the difference between the coarse analog signal and the supplied analog signal, and a fine converter responsive to the determined difference for converting said difference to a fine digital representation of the supplied analog signal. A reference signal is periodically supplied to the coarse converter such that this supplied reference signal is converted to a coarse digital signal representation thereof, the coarse digital signal representation of the reference signal is reconverted to a coarse analog reference signal and the difference between this coarse analog reference signal and the periodically supplied reference signal is determined. A detector is operative during the period that the reference signal is supplied to the coarse converter for detecting a D.C. drift in the operation of the reconverter. A uniform D.C. compensating signal is produced in accordance with the detected D.C. drift and is applied to the reconverter so as to compensate for such D.C. drift.

REFERENCES:
patent: 3365713 (1968-01-01), Avignon
patent: 3560648 (1971-02-01), Kitsopoulos
patent: 3789389 (1974-01-01), Lenhoff
patent: 3816825 (1974-06-01), Kaneko
patent: 3860952 (1975-01-01), Tallent

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