Non-linear de-emphasis circuit

Details Non-linear de-emphasis circuit Non-linear de-emphasis circuit

1991-06-27

1993-01-26

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328164, 328165, 328167, 307264, 307493, H04B 110, H04B 1500

Patent

active

051825201

ABSTRACT:
In an apparatus for non-linear de-emphasis of an input signal, an amplitude limiting signal is obtained by subtracting a high-pass filtered and amplitude limited input signal from the original input signal, then the amplitude limiting signal is amplified with a gain determined by the amplitude of the amplitude limiting signal and subtracted from the input signal to provide a non-linearly de-emphasized signal with an improved signal-to-noise ratio and without substantial deterioration in high frequency small amplitude components of the input signal.

REFERENCES:
patent: 3654563 (1972-04-01), Hesler et al.
patent: 4618893 (1986-10-01), Hirota et al.
patent: 4658305 (1987-04-01), Tsushima
patent: 4682251 (1987-07-01), Hirota et al.
patent: 4730165 (1988-03-01), Nishino et al.
patent: 4849826 (1989-07-01), Ohta
patent: 4931743 (1990-06-01), Fukuda et al.
patent: 5032909 (1991-07-01), Sato et al.

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