Electrical signal processing

Details Electrical signal processing Electrical signal processing

1979-12-10

1982-04-27

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307490, 307529, 328160, G06G 700, G06G 712

Patent

active

043273297

ABSTRACT:
A circuit is disclosed which is responsive to an input signal for producing an output signal dependent on its root mean square. The circuit comprises a multiplying circuit for producing a squared signal proportional to the square of the input signal, an averaging circuit responsive to the squared signal to produce an average signal proportional to the mean of the squared signal, and a square root circuit for taking the square root of the average signal. At periodic or aperiodic instants, switches disconnect the input signal and maintain it disconnected each time for a predetermined time duration. A feedback circuit operates during each such duration to produce a feedback signal which exactly offsets any output still produced by the multiplying circuit during that duration due to noise or drift. Any such feedback signal is stored between the predetermined durations and applied as a correcting signal to the output of the multiplying circuit. Also disclosed is one particular form which the multiplying circuit can take.

REFERENCES:
patent: 3614411 (1971-10-01), Henderson
patent: 3940703 (1976-02-01), Hekimian et al.
patent: 4242638 (1980-12-01), Glaser et al.

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