SIGNAL IDENTIFIER

PURPOSE:To minimize the adverse effect of a dropout by providing a dropout detecting circuit to detect the dropout of an input signal and opening the feedback loop of a quantized feedback signal when the dropout is detected. CONSTITUTION:The zero cross point of the output of an adder circuit 1 is de...

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Bibliographic Details
Main Author ENDOU NAOKI
Format Patent
LanguageEnglish
Published 30.01.1985
Edition4
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
PULSE TECHNIQUE
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PURPOSE:To minimize the adverse effect of a dropout by providing a dropout detecting circuit to detect the dropout of an input signal and opening the feedback loop of a quantized feedback signal when the dropout is detected. CONSTITUTION:The zero cross point of the output of an adder circuit 1 is detected by an identifying circuit 2, and the output of the circuit 2 is processed by a waveform shaping circuit 3 which works on the clock given from a clock reproduction circuit 4. Thus a digital signal is reproduced, and a part of this signal is transmitted through an LPF5 to obtain a quantized feedback signal. When no dropout is detected, a switch circuit 7 forms a feedback loop. Then a quantized feedback system is formed for identification of the data with compensation of DC reproduction of the input signal. When a dropout detecting circuit 6 detects a dropout, the circuit 7 opens the feedback loop formed by the LPF5.
Bibliography:Application Number: JP19830126675