Diskette read data recovery system

Details Diskette read data recovery system Diskette read data recovery system

1983-05-02

1985-08-06

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

331 1A, 360 51, H03L 706, G11B 509

Patent

active

045340447

ABSTRACT:
A diskette read data recovery system generates a clock which is locked to an incoming data stream. In a phase locked loop, a signal generated by an oscillator and frequency dividers is compared in phase to the incoming data stream to provide first or second signals depending on whether the incoming data signal leads or lags the clock signal. In order that the system may handle different types of incoming signals, different frequency divider circuits in the phase locked loop are selected for different incoming signals.

REFERENCES:
patent: 4143407 (1979-03-01), Liberty
patent: 4390910 (1983-06-01), Wilson
patent: 4404530 (1983-09-01), Stryer
patent: 4464638 (1984-08-01), Crowley et al.

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