Adaptive filter network

Details Adaptive filter network Adaptive filter network

1978-07-18

1980-06-10

Gensler, Paul L.

Wave transmission lines and networks

Automatically controlled systems

Impedance matching

179 1D, 179 1P, 328167, 330107, 330149, 330294, 330305, H03H 710

Patent

active

042075432

ABSTRACT:
An adaptive filter network comprising a controllable filter having an adjustable cut-off frequency and adapted for varying the pass-band of the network. The adaptive filter network further includes a serial arrangement of an algebraic adder for generating control signals, connected to the controllable filter; a weighting filter for converting the control signal spectrum in response to the load sensitivity variation with frequency; a threshold limiter for setting the noise reduction threshold level of the adaptive filter network; a control signal frequency corrector; and an amplitude detector for shaping control signals applied to the control input of the controllable filter. The network analysis of the input audio signal spectrum and the width of its pass-band is varied depending on the present frequency limit of the input audio signal wanted components.

REFERENCES:
patent: 3678416 (1972-07-01), Burwen
patent: 3714588 (1973-01-01), Deboo et al.
patent: 3753159 (1973-08-01), Burwen

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