Digital voltmeter with electro-optical indication of the wavefor

Details Digital voltmeter with electro-optical indication of the wavefor Digital voltmeter with electro-optical indication of the wavefor

1979-11-01

1981-06-02

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

324115, 324121R, G01R 1916, G01R 1508

Patent

active

042713919

ABSTRACT:
A digital voltmeter device is disclosed which displays both the numerical value of a measured voltage and a visual representation of an input waveform. The device includes an electro-optical display matrix utilizing display elements arranged in lines and columns. In order to make maximum use of the display matrix for representing input waveforms, the peak-to-peak voltage of the input waveform is measured and utilized as a reference for an analog to digital converter having output signals which form the address signals for the display matrix. The peak values of the input waveform thus appear at the top and bottom of the display matrix respectively.

REFERENCES:
patent: 3204144 (1965-08-01), Deavenport
patent: 3873918 (1975-03-01), Talbert
patent: 4114095 (1978-08-01), Pankoue et al.

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