Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1977-10-31
1979-01-23
Heyman, John S.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
328145, 333 14, 330109, H03B 302
Patent
active
041363140
ABSTRACT:
An adaptive signal weighting system for use in electrical signal transmission along a signal path comprises a variable filter disposed in the signal path having electrical transmission characteristics capable of varying in response to a first control signal the relationship between the spectral region of dominant energy in a transmitted signal relative to the other spectral regions of the transmitted signal. Frequency discrimination means senses the spectral region of dominant signal energy in the transmitted signal and provides the first control signal as a function of frequency of the dominant signal energy. Gain control means disposed in the signal path and coupled in series with the filter means provides a gain variable on the transmitted signal responsively to a second control signal. This second control signal is logarithmically related to the amplitude of the transmitted signal over at least a portion of the frequency range of the signal.
REFERENCES:
patent: 2931901 (1960-04-01), Markusen
patent: 3355668 (1967-11-01), Boensel et al.
patent: 3428791 (1969-02-01), Chandos
patent: 4072914 (1978-02-01), Haramoto et al.
Blackmer David E.
Jaeger C. Rene
DBX Inc.
Heyman John S.
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