Title:
OPTICAL CLOCK DEVICE
Document Type and Number:
Japanese Patent JPH0328912
Kind Code:
A
Abstract:
PURPOSE: To realize a very short cycle time by using a method which converts an optical clock signal to an electric clock signal.
CONSTITUTION: An optical pulse is synchronously divided into N independent optical fibers 18 by a 1/N light beam divider 16 and is divided again into M optical fibers by a 1/M light beam divider 20. This bundle of M optical fibers is coupled to each module 22 where delayed optical pulse signals from a pair of optical fibers are converted to corresponding electric clock signals, and this clock information is directly distributed to timing chips on modules but doesn't pass various passive elements having insufficient transmission characteristics, and therefore, the timing skew is minimized.
Inventors:
BUNSEN FUAN
MODESUTO MAIKERU OPURISUKO
RITSUKII AREN RANDO
MODESUTO MAIKERU OPURISUKO
RITSUKII AREN RANDO
Application Number:
JP11885690A
Publication Date:
February 07, 1991
Filing Date:
May 09, 1990
Export Citation:
Assignee:
IBM
International Classes:
G04F5/00; G02B6/00; G02B6/28; G02B6/43; G02B27/00; G06E1/00; G06F1/10; H04L7/00; (IPC1-7): G02B6/00; G02B27/00; G04F5/00; G06E1/00; G06F1/10
Attorney, Agent or Firm:
Koichi Tonmiya (1 person outside)
Next Patent: JPH0328913