Equalizer circuit for use in communication unit

Wave transmission lines and networks – Coupling networks – Equalizers

Patent

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Details

333 81R, 375101, H03H 1106

Patent

active

044918089

ABSTRACT:
An equalizer circuit for use in a communication unit comprises a variable amplitude equalizer (VAE) and a variable group delay equalizer (VDE). The variable amplitude equalizer (VAE) is able to vary only an amplitude frequency response continuously without varying a group delay frequency response, while the variable group delay equalizer (VDE) is able to vary only a group delay frequency response continuously without varying an amplitude frequency response, both being able to adjust the amplitude and group delay frequency responses, respectively, in an independent manner. Preferably, the variable group delay equalizer (VDE) includes an amplitude correcting portion and is structured such that amplitude distortion caused in a delay portion can be corrected by a signal from the amplitude correcting portion.

REFERENCES:
patent: 3551854 (1970-12-01), Endo et al.
patent: 3609599 (1971-09-01), Standley
patent: 3737808 (1973-06-01), Srivastava
patent: 4071782 (1978-01-01), Vidovic

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