Signal control circuit

Details Signal control circuit Signal control circuit

1973-05-11

1976-03-23

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307254, 328 26, H03K 1700

Patent

active

039462498

ABSTRACT:
A circuit to control the frequency response of a variable filter by means of a control signal based on the amplitude of the information signal to minimize the effect of noise in a signal transmission system. The variable filter is connected to an output circuit of an information signal amplifier and may feed the frequency-modified information signal to a system output terminal, if the system is to compress the dynamic range of the information signal by amplifying low amplitude signals more than high amplitude signals. Alternatively, the filter may feed the frequency-modified signal back to the input of the amplifier by way of connecting means, such as switch, to expand the dynamic range. Control of the filter for low frequency signals is achieved by rectifying and filtering the signals to the control amplifier. Negative-going transients are inverted and by-pass the rectifier and filter and are applied directly to the control amplifier. Positive-going transients are applied through the filter and are not inverted.

REFERENCES:
patent: 2580020 (1951-12-01), Hammond, Jr.
patent: 2678387 (1954-05-01), Volz
patent: 2972677 (1961-02-01), Meadows
patent: 3151299 (1964-09-01), Smith
patent: 3238383 (1966-03-01), Falk
patent: 3289007 (1966-11-01), Zydney

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