Read clock producing system

Details Read clock producing system Read clock producing system

Filed on

1983-10-25

Date issued

1986-04-01

Examiner

Olms, Douglas W.

Patent Class

Pulse or digital communications

SubClass

Spread spectrum

SubSubClass

Direct sequence

Other Related Categories

360 51, H04L 700

Type

Patent

Status

active

Patent number

045802785

Description

ABSTRACT:
In a read clock producing system for generating a read clock signal which is used for extracting a digital information portion of a digital coded signal, the system comprises means for delaying a pulse obtained by comparing data with a certain threshold level, means for generating a clock pulse having a pulse width proportional to the delay, said generating means including a frequency division circuit, flip-flop and EOR means for comparing the pulse width with a predetermined pulse width, a differential amplifier for comparing the data with a second threshold level adapted to change in accordance with the above comparison, and the control means for controlling the delay by the use of an output from said comparison.

REFERENCES:
patent: 3736581 (1973-05-01), Breikss
patent: 3755748 (1973-08-01), Carlow et al.
patent: 3949170 (1976-04-01), Shionoya
patent: 4275466 (1981-06-01), Yamamoto

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