Reproduction apparatus having circuit for accurately detecting a

Details Reproduction apparatus having circuit for accurately detecting a Reproduction apparatus having circuit for accurately detecting a

1990-09-24

1992-06-30

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

369 59, H03M 134

Patent

active

051267411

ABSTRACT:
A binary signal detector includes a delay circuit for delaying an analog signal reproduced from an optical disk by a predetermined period of time so as to output a delayed analog signal which is delayed from the change in level of the analog signal and varies in proportion to the level change, a reference signal generator for providing an analog reference signal which is changes in proportion to the level change of the analog signal and has a larger amplitude than the delayed analog signal, and a comparator for comparing the level of the analog reference signal with that of the delayed analog signal, and generating a binary output having a logic level corresponding to the binary data when the signal level of the analog reference signal is different from that of the delayed analog signal.

REFERENCES:
patent: 3936819 (1976-02-01), Angelle et al.
patent: 4961182 (1990-10-01), Saito et al.

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