Pulse width-pulse height multiplicator in a static kWh meter

Details Pulse width-pulse height multiplicator in a static kWh meter Pulse width-pulse height multiplicator in a static kWh meter

1987-05-28

1988-10-04

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

364482, 364842, G01R 2106

Patent

active

047758341

ABSTRACT:
In a static KWh meter, a pulse width-pulse height multiplicator which forms a pulse width-pulse height-modulated signal proportional to the product of measuring signals proportional to voltage and current intensity, said signal being supplied to a voltage/frequency converter (5), from which is obtained a frequency signal (f) proportional to the power and which controls a counting device (7) indicating the energy consumed. The pulse width-pulse height multiplicator has been carried out without any operator amplifiers in that it contains summing members (R1, R2) for adding together a signal (U.sub.u) proportional to the voltage and a triangle wave (U.sub.o), and an analog switch (10) controlled by the summed signal (U.sub.o +U.sub.u) and which takes samples from a signal (U.sub.i) proportional to the current intensity.

REFERENCES:
patent: 4275349 (1981-06-01), Wintermute

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