Method and means for converting an analog signal into a digital

Details Method and means for converting an analog signal into a digital Method and means for converting an analog signal into a digital

1992-09-01

1994-02-22

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341168, H03M 150

Patent

active

052891879

ABSTRACT:
Method and apparatus for converting an analog input voltage signal (preferably in the form of a low-frequency rectangular voltage) to a digital output signal proportional to the input voltage. The input voltage is integrated to the integrator voltage over a certain integration time. After the expiration of the integration time, the integrator voltage is de-integrated to zero over a de-integration time by a reference voltage and the input voltage is found from the ratio of de-integration time to integration time, multiplied by the reference voltage. During the integration time, modulation pulses, preferably derived from the reference voltage, are superimposed on the input voltage and thus the integrator voltage is influenced, so that a given integrator voltage is obtained regardless of the input voltage.

REFERENCES:
patent: 4268820 (1981-05-01), Hareyama
patent: 4354176 (1982-10-01), Aihara
patent: 4361831 (1982-11-01), Grutzediek et al.
patent: 4395701 (1983-07-01), Evans
patent: 4857933 (1989-08-01), Knight
patent: 4965578 (1990-10-01), Poujois
patent: 5101206 (1992-03-01), Riedel
Technisches Messen 49 Jahrgang (1982) Heft 10 Klassifizierung der integriarenden Analog-Digital-Umsetzer by Von A. Bayati.

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