Clock distribution system for digital computers

Patent · 01 January 1981

OSTI ID:863816

Wyman, Robert H ^[1]

---

1. Brentwood, CA

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

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4253065
• OSTI ID: 863816
• Country of Publication: United States
• Language: English

Related Subjects

/327/375/
01
amplifier
apparatus
arbitrarily
array
associated
catch-up
change-of-state
characteristic
clock
clock distribution
clock pulse
component
computers
cumulative
derivative
detector
digital
digital computer
digital computers
distribution
due
electromagnetic
electromagnetic signal
eliminating
error
filter
filter means
frequency
frequency component
fundamental
fundamental frequency
identical
ltoreq
means
modified
operatively
operatively associated
overtaking
periodic
phase
phase shift
predetermined
predetermined threshold
prior
produce
producing
proportional
pulse
receipt
receiving
response
sequential
sequential pulse
shift
signal
signal characteristic
substantially
substantially identical
t-
theta
threshold
time
time derivative
timing
uniformly