Clock-signal reproducing circuit including voltage controlled os

Details Clock-signal reproducing circuit including voltage controlled os Clock-signal reproducing circuit including voltage controlled os

1984-10-05

1986-06-10

Cardillo, Raymond F.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

331 17, 331 27, 360 51, 360 55, 360 39, G11B 502, G11B 509, G11B 2736, H03L 700

Patent

active

045947031

ABSTRACT:
A simplified clock-signal reproducing circuit for reproducing a clock signal from a repetitive pulse signal or a digital signal such as an EFM signal read from a compact disc as a data recording medium of the compact disc digital audio system is provided. A voltage-controlled oscillator generates a first repetition signal, and a second repetition signal is formed from the first repetition signal, the second repetition signal being the clock signal. The repetitive pulse signal is latched by a first latch in response to the clock signal, and a signal which is a delayed output of the first latch is latched by a second latch in response to the clock signal. A voltage representing a phase difference between a clock signal in the repetitive pulse signal and the clock signal generated by the voltage-controlled oscillator is generated in accordance with a first phase difference between the input and output signals of the first latch and a second phase difference between input and output signals of the second latch. This voltage is applied to the voltage-controlled oscillator to thereby control the frequency of the first repetition signal so that the first and second phase differences become equal to each other and that the clock signal generated by the voltage-controlled oscillator and the clock signal existing in the repetitive pulse signal coincide in phase with each other.

REFERENCES:
patent: 4338683 (1982-07-01), Furukawa et al.
patent: 4388596 (1983-06-01), Yamashita
patent: 4404530 (1983-09-01), Stryer
patent: 4495474 (1985-01-01), Nishikawa et al.
A Long Play Digital Audio Disk System; Journal of the Audio Engineering Society, vol. 27, No. 12, by Doi et al., Dec. 1979.

Affiliated with

Also associated with

Rating

Clock-signal reproducing circuit including voltage controlled os does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock-signal reproducing circuit including voltage controlled os, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock-signal reproducing circuit including voltage controlled os will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2408718