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Title: Clock distribution system for digital computers

Abstract

Apparatus for eliminating, in each clock distribution amplifier of a clock distribution system, sequential pulse catch-up error due to one pulse "overtaking" a prior clock pulse. The apparatus includes timing means to produce a periodic electromagnetic signal with a fundamental frequency having a fundamental frequency component V'.sub.01 (t); an array of N signal characteristic detector means, with detector means No. 1 receiving the timing means signal and producing a change-of-state signal V.sub.1 (t) in response to receipt of a signal above a predetermined threshold; N substantially identical filter means, one filter means being operatively associated with each detector means, for receiving the change-of-state signal V.sub.n (t) and producing a modified change-of-state signal V'.sub.n (t) (n=1, . . . , N) having a fundamental frequency component that is substantially proportional to V'.sub.01 (t-.theta..sub.n (t) with a cumulative phase shift .theta..sub.n (t) having a time derivative that may be made uniformly and arbitrarily small; and with the detector means n+1 (1.ltoreq.n

Inventors:
 [1];  [2]
  1. (Brentwood, CA)
  2. (Davis, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
863816
Patent Number(s):
4253065
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
clock; distribution; digital; computers; apparatus; eliminating; amplifier; sequential; pulse; catch-up; error; due; overtaking; prior; timing; means; produce; periodic; electromagnetic; signal; fundamental; frequency; component; 01; array; characteristic; detector; receiving; producing; change-of-state; response; receipt; predetermined; threshold; substantially; identical; filter; operatively; associated; modified; proportional; t-; theta; cumulative; phase; shift; time; derivative; uniformly; arbitrarily; ltoreq; fundamental frequency; clock pulse; signal characteristic; predetermined threshold; filter means; substantially identical; phase shift; electromagnetic signal; digital computer; operatively associated; clock distribution; frequency component; sequential pulse; time derivative; digital computers; /327/375/

Citation Formats

Wyman, Robert H., and Loomis, Jr., Herschel H. Clock distribution system for digital computers. United States: N. p., 1981. Web.
Wyman, Robert H., & Loomis, Jr., Herschel H. Clock distribution system for digital computers. United States.
Wyman, Robert H., and Loomis, Jr., Herschel H. Thu . "Clock distribution system for digital computers". United States. https://www.osti.gov/servlets/purl/863816.
@article{osti_863816,
title = {Clock distribution system for digital computers},
author = {Wyman, Robert H. and Loomis, Jr., Herschel H.},
abstractNote = {Apparatus for eliminating, in each clock distribution amplifier of a clock distribution system, sequential pulse catch-up error due to one pulse "overtaking" a prior clock pulse. The apparatus includes timing means to produce a periodic electromagnetic signal with a fundamental frequency having a fundamental frequency component V'.sub.01 (t); an array of N signal characteristic detector means, with detector means No. 1 receiving the timing means signal and producing a change-of-state signal V.sub.1 (t) in response to receipt of a signal above a predetermined threshold; N substantially identical filter means, one filter means being operatively associated with each detector means, for receiving the change-of-state signal V.sub.n (t) and producing a modified change-of-state signal V'.sub.n (t) (n=1, . . . , N) having a fundamental frequency component that is substantially proportional to V'.sub.01 (t-.theta..sub.n (t) with a cumulative phase shift .theta..sub.n (t) having a time derivative that may be made uniformly and arbitrarily small; and with the detector means n+1 (1.ltoreq.n},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

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