Data acquisition system and analog to digital converter therefor

Details Data acquisition system and analog to digital converter therefor Data acquisition system and analog to digital converter therefor

1980-01-28

1982-09-14

Sloyan, Thomas J.

Communications: electrical

Continuously variable indicating

Using a particular modulation

34087031, H04Q 500

Patent

active

043498213

ABSTRACT:
From a plurality of parallel channels of communication, each including a voltage-to-frequency (V/F) converter, a central clock synchronously timed for each channel, the derivation of a train of pulses having a number of pulses representative of the magnitude of an analog signal inputted to the V/F converter. The central clock also times the multiplexing at the measuring point of either the analog input signal or a bias voltage for calibration or a voltage reference for scaling. The central processor receives the counts from each train of pulses, combines them and threats them to provide a corrected count in each channel separately. Clocking and pulsing are effected through an isolation transformer associated with each channel, to and from the central processor.

REFERENCES:
patent: 3833903 (1974-09-01), Gordon et al.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/72, pp. I-26 to I-33.

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