Electronic measuring apparatus

Details Electronic measuring apparatus Electronic measuring apparatus

1980-12-22

1983-01-04

Krawczewicz,

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2700

Patent

active

043674380

ABSTRACT:
An electronic measuring apparatus utilizes an RC oscillator, having one fixed impedance element, in one feedback loop, and two similar impedance elements alternately and separately coupled into the circuit, utilizing separate transmission gates and separately energizable inverters, each tandemly operated so as to disengage one of the similar impedance elements, while the other impedance element is being utilized. The output of the device is two separate and sequential streams of pulses, each reflecting the magnitude of each of the similar impedance elements, when employed in the circuit. Stability and response time is enhanced, permitting accurate measurement of a variable impedance element, against a like but fixed impedance element, if desired. Display means are provided, after both series of pulses are electively added, subtracted, multiplied, or divided.

REFERENCES:
patent: 3711770 (1973-01-01), Wilson

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