Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1995-09-29
1997-10-28
Lee, Benny
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
333 28R, 333166, H04B 304, H03H 1500
Patent
active
056821255
ABSTRACT:
An analog, adaptive generalized transversal equalizer for use in the filtering system of a disc drive PRML read channel, the transversal equalizer employing the use of non-ideal delay elements. The filtering system comprises the equalizer connected in series with an adaptive, analog prefilter. The prefilter is comprised of a plurality of serially connected, adaptive, analog filter stages having variable transfer functions determined by adaptive parameter signals received by the filter stages. The generalized transversal equalizer comprises a plurality of serially connected, adaptive, analog low pass filters, having taps on either side of each low pass filter, a plurality of multipliers that receive signals at the tap locations of the delay circuit, and a summing circuit that receives the outputs of the multipliers. The transfer functions of the delay circuit are continuously variable in relation to adaptive parameter signals received by the delay circuit and the coefficients of multiplication are variable in relation to the adaptation process.
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Kovner Vladimir
Minuhin Vadim B.
Surendran Srinivasan
Bettendorf Justin P.
Heller III Edward P.
Lee Benny
McCarthy Bill D.
McCarthy Randall K.
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