Method for converting an analog voltage to a digital value free

Details Method for converting an analog voltage to a digital value free Method for converting an analog voltage to a digital value free

1978-08-01

1980-03-25

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1320

Patent

active

041952839

ABSTRACT:
An integrating type analog-to-digital converter is provided which finds in the first conversion cycle an analog-to-digital conversion value including a possible conversion error resulting from offset voltage applies an unknown voltage to an inverting amplifier in a second conversion cycle to find an analog-to-digital conversion value including a possible conversion error like the unknown voltage so polarity-inverted, and finds a sum of both the conversion values to thereby obtain a correct digital-to-analog conversion value free from conversion errors resulting from offset voltage etc. of an integrator. N reference voltage is overlapped with respect to the unknown voltage and conversion around zero is continuous. The converter permits a bipolar operation using a signal-polarity reference voltage.

REFERENCES:
patent: 3828347 (1974-08-01), Sacks
patent: 3872466 (1975-03-01), Wold
patent: 3942173 (1976-03-01), Wold
patent: 4063236 (1977-12-01), Amemiya
patent: 4081800 (1978-03-01), Amemiya

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