Disk reproduction apparatus capable of continuously varying a re

Details Disk reproduction apparatus capable of continuously varying a re Disk reproduction apparatus capable of continuously varying a re

1998-06-26

2000-12-05

Hindi, Nabil

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

3691241, 369 59, G11B 700

Patent

active

061576034

ABSTRACT:
A data slice circuit which generates a EFM signal from a RF signal includes a clock signal generator circuit for generating a clock signal not synchronized with the EFM signal. The data slice circuit divides a clock signal not synchronized with the EFM signal, by a divider, to generate a clock signal for counting. The clock signal for counting is inputted as a clock into an up/down counter. Up/down count control of the up/down counter is performed on the basis of an output from a comparator. The comparator compares the RF signal with a reference voltage and outputs data "1" or "0" in accordance with the comparison result. A count output of the up/down counter is converted into an analog voltage by a digital/analog converter and is supplied as a reference voltage to the comparator.

REFERENCES:
patent: 5170386 (1992-12-01), Tateishi
patent: 5526339 (1996-06-01), Shimada
patent: 5856963 (1999-01-01), Inagawa et al.
patent: 5974088 (1999-10-01), Chang
patent: 5982724 (1999-11-01), Hayashi et al.

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