Method and apparatus for converting analog signal into digital s

Details Method and apparatus for converting analog signal into digital s Method and apparatus for converting analog signal into digital s

1983-05-11

1986-01-28

Miska, Vit W.

Communications: electrical

Audible indication

Percussion-type sound producer

340347NT, H03K 1302

Patent

active

045674655

ABSTRACT:
An A-D converter includes an integrator, a measured voltage supply circuit, first and second reference input supply circuits, first and second voltage level detecting circuits, a charge transfer circuit, a clock pulse generator, and a counter. The integrator has first and second integrating capacitors. After a first reference input is supplied, charge in the first integrating capacitor is transferred to the second integrating capacitor through a charge transfer circuit. As a result, voltage of the second capacitor is raised. A second reference input is supplied to the second integrating capacitor. A counter counts clock pulses during the period of supplying the first reference input and the period of supplying the second reference input. The measured voltage in analog system is converted into digital signal based on the period of supplying the measured voltage, the period of supplying the first reference input, the period of supplying the second reference input, value of the first reference input and value of the second reference input.

REFERENCES:
patent: 4164733 (1979-08-01), Landsburg et al.
patent: 4210903 (1980-07-01), La Brie
patent: 4383246 (1983-05-01), Munt
patent: 4395701 (1983-07-01), Evans
patent: 4484177 (1984-11-01), Jobaggy
"Precision DVM has Wide Dynamic Range and High Systems Speed", Lawrence T. Jones et al., Hewlett-Packard Journal, vol. 32, No. 4, Apr. 1981, pp. 25-31.

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