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Primary Examiner: Konick, Bernard
Assistant Examiner: Faber, Alan
Attorney: Spencer & Kaye

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Title: Demodulation system with dropout correction

Abstract: A demodulation system of a playback device for a carrier frequency signal containing both useful information in the zero passages of the signal and signal break-ins which occur in the playback device. The system includes a limiter for limiting in an asymmetrical manner a signal fed to it and a demodulator coupled to the output of the limiter. A highpass filter is connected between the limiter and the demodulator so as to couple the output signal from the limiter to the demodulator. The highpass filter substantially passes only the useful information portion of the carrier signal and suppresses any break-ins introduced into the signal.

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Inventors: Dickopp, Gerhard (Berlin, DT)
Potter, Manfred (Berlin, DT)
Brehm, Otto (Berlin, DT)

Application Number: 346889
Filing Date: 1973-04-02
Publication_date: 1976-03-09
Assignee: TED Bildplatten Aktiengesellschaft AEG-Telefunken-Teldec (Zug, CH)
Primary Class(es): 386/113
Other Classes:
US Patent Ref:

2944107	Jul, 1960	Johnson	178/6.
3243604	Mar, 1966	Johnson	328/167.
3309460	Mar, 1967	Rank	178/6.
3408457	Oct, 1968	Boylan	178/6.
3461230	Aug, 1969	Hodge	178/6.
3580990	May, 1971	Numakura	178/6.
3629494	Dec, 1971	Hurst	178/6.
3702374	Nov, 1972	Numakura	178/6.
3717725	Feb, 1973	Numakura	178/6.
3721773	Mar, 1973	Kluge	178/6.
3727131	Apr, 1973	Puckette	328/167.
3798364	Mar, 1964	Hayashi	178/6.

Other Refs: Other References: "The High Pass RC Circuit as a Differentiator"; Millman and Taub; p. 38-40; Pulse Digital and Switching Waveforms, 1965, McGraw-Hill, Inc.