Method and circuit for measuring and displaying physical values

Details Method and circuit for measuring and displaying physical values Method and circuit for measuring and displaying physical values

1987-02-03

1988-12-27

Smith, Jerry

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonlinear

364573, 36457104, G01R 1704

Patent

active

047943300

ABSTRACT:
A method and circuit for measuring and displaying a parameter, in which the parameter is sensed by means of a sensor which supplies an output voltage representative of the value of the parameter, the output voltage is compared with a comparison voltage associated with the sensor response characteristic, and a display is produced on the basis of the result of the comparing step. The comparison is effected by supplying the output voltage from the sensor to a first input of a comparator, supplying the comparison voltage to a second input of the comparator, and varying the comparison voltage between successive values extending over the output voltage range of the sensor. The display is produced by providing a succession of parameter value signals each associated with a respective comparison voltage value, supplying each parameter value signal to a latch device in synchronism with occurrence of the associated comparison voltage value, and conducting to a display device from the latch device the parameter value signal which is associated with the comparison voltage value that corresponds to the output voltage value of the sensor.

REFERENCES:
patent: 4149120 (1979-04-01), Richter
Arbel, A., "Analog Signal Processing and Instrumentation".

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