Analog-to-digital converter

Details Analog-to-digital converter Analog-to-digital converter

1978-08-22

1979-12-11

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, H03K 1320

Patent

active

041785851

ABSTRACT:
An analog-to-digital converter comprising a capacitor for storing an analog input signal, a constant current discharging circuit coupled with the capacitor for discharging the charge stored therein, a level detection circuit connected to the input terminal of the capacitor, a counter connected to the output terminal of the level detection circuit for counting the number of clock-pulses between the time of discharge start and the time when the voltage at the input terminal of the capacitor drops to a detection level of the level detection circuit, a bias voltage supply means connected in series with the capacitor for adding a bias voltage to the voltage at the input terminal of said capacitor, and a switch connected in parallel with the capacitor for short-circuiting the capacitor when the voltage at the input terminal of said capacitor drops to the detection level.

REFERENCES:
patent: 3480948 (1969-11-01), Lord
patent: 4023160 (1977-05-01), Kirschner
Duke, "IEEE Transactions on Instrumentation and Measurement" Feb. 1971, pp. 74-76.

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