Variable delay unit for data synchronizer using phase-sensitive counter to vary the delay

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United States of America Patent

PATENT NO 4524448
SERIAL NO

06422232

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Abstract

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A signal processing circuit for a signal varying in its properties, e.g., in its degress of distortion, in which the input signal is fed in parallel to two similar processing circuits e.g., equalizers, the characteristic of which can be varied by a control signal, wherein the control signal from the one processing circuit is periodically varied and the output signal is fed to a detector circuit which in optimum signal processing emits a trigger pulse to a holding circuit 52 which stores the corresponding control signal level, which is fed to the second processing circuit. A variable delay unit for the data is controlled by a continuously varying up-down counter, the contents of which continuously vary at the rate of a high frequency clock pulse. The direction of count and the time of the count is controlled by comparing the relative time-positions or phases of a timing pulse received with the data and a timing pulse generated at the receiver.

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Patent Owner(s)

Patent OwnerAddress
SIEMENS NIXDORF INFORMATIONSSYSTEME AGPEDRO BONN GERMANY PADERBORN NORTH RHINE-WESTPHALIA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hullwegen, Josef Altenbeken, DE 3 76

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