Multiplier

Details Multiplier Multiplier

1988-09-22

1990-04-24

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324142, 364483, 364841, G01R 1132, G06G 716

Patent

active

049203126

ABSTRACT:
A multiplier having pulse width modulators for modulating input signals into pulse signals whose pulse widths are corresponding to the levels of the input signals and which are asynchronous to each other; an oscillator for outputting a pulse signal at a frequency higher than any one of those of the pulse signals from the pulse width modulators; a logical gate portion which receives the pulse signals from the pulse width modulators as well as the pulse signal from the oscillator to executes predetermined logical operation on the pulse signals; and a subtracter which calculates, according to the pulse widths of the pulse signals from the pulse width modulators, the number of pulses outputted within a predetermined interval from the oscillator to provide a signal proportional to the product of levels of the input signals.

REFERENCES:
patent: 3953795 (1976-04-01), Brunner et al.
patent: 4055804 (1977-10-01), Mayfield
patent: 4079313 (1978-03-01), Callan
patent: 4224671 (1980-09-01), Sugiyama et al.
patent: 4498138 (1985-02-01), Moore

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