Measuring device of the rms value of a signal, notably for curre

Details Measuring device of the rms value of a signal, notably for curre Measuring device of the rms value of a signal, notably for curre

1990-07-17

1991-06-25

Wieder, Kenneth

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonlinear

328144, 364841, G01R 1900, G01R 1902

Patent

active

050270605

ABSTRACT:
The measuring device of the rms value of a signal comprises, in series, a full-wave rectifier, a low-pass filter, for example of the RC type, and a peak detector. The output signal of the device is representative of the rms value of the input signal, the cut-off frequency of the filter corresponding to an angular frequency comprised between 4.pi.f/6 and 4.pi.f/5.33, f being the fundamental frequency of the input signal of the device.

REFERENCES:
patent: 3532984 (1970-10-01), Wise
patent: 3795868 (1974-03-01), Ohme et al.
patent: 4245183 (1981-01-01), Glennon
patent: 4360880 (1982-11-01), Brodie et al.
patent: 4472676 (1984-09-01), Eichmann et al.
patent: 4603542 (1986-08-01), Siegel
Funkschau, No. 19, Sep. 1983, pp. 79-82, E. Hormannsdorfer, "Genauigkeit ist keine Hexerie".

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