METHOD FOR REDUCING DC OFFSET AND ITS CIRCUIT DEVICE

PROBLEM TO BE SOLVED: To provide a circuit for reducing a DC offset that does not need a sample string or a preamble with a prescribed value without affecting a band width of a transmission medium. SOLUTION: In order to reduce DC offset of burst signals B1, B2 of a digital signal S1, an averaging de...

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Bibliographische Detailangaben
Hauptverfasser:	GENEST PIERRE, MACQ DAMIEN LUC FRANCOIS
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a circuit for reducing a DC offset that does not need a sample string or a preamble with a prescribed value without affecting a band width of a transmission medium. SOLUTION: In order to reduce DC offset of burst signals B1, B2 of a digital signal S1, an averaging device AV averages some samples of one bust in digital bursts B1 not having a prescribed value in order to obtain a correction value CV. In the meantime, the samples of the digital burst signals B1 are tentatively stored in a memory MEM1. Then the DC offset correction value DV calculated by the averaging device AV is subtracted from samples of the digital burst signals B1, B2. Thus, the dynamic range of the samples is greatly narrowed.