Pulse or digital communications – Equalizers
Patent
1995-12-08
1998-07-07
Vo, Don N.
Pulse or digital communications
Equalizers
375316, H03H 730
Patent
active
057780285
ABSTRACT:
A DC removal circuit for removing residual DC from a digitally encoded television signal including a plurality of multi level data symbols occurring at a constant symbol rate and formatted in repetitive data fields, each field including repetitive data segments having data segment sync of a fixed pattern of four symbols. A derived value of DC is subtracted from each of the received data symbols. The output of the subtractor is sampled, at the symbol rate or at one-half the symbol rate, and the sampled output is accumulated in an accumulator for generating the derived value. The sampling is continuous. The accumulator is preset to a zero value upon tuning to a different channel. An equalizer is supplied with the derived value of DC.
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patent: 5416524 (1995-05-01), Citta et al.
patent: 5475714 (1995-12-01), Turner
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Vo Don N.
Zenith Electronics Corporation
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