Browse Prior Art Database

Variable Cycle Time Oscillator

IP.com Disclosure Number: IPCOM000110720D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 35K

Publishing Venue

IBM

Related People

Johnson, DD: AUTHOR [+3]

Abstract

The oscillator for a synchronous computer puts out a pulse train at a very tightly controlled repetition rate. This disclosure describes an oscillator that deviates from this characteristic operation while allowing the oscillator to remain synchronous with the reference.

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This is the abbreviated version, containing approximately 100% of the total text.

Variable Cycle Time Oscillator

      The oscillator for a synchronous computer puts out a pulse
train at a very tightly controlled repetition rate.  This disclosure
describes an oscillator that deviates from this characteristic
operation while allowing the oscillator to remain synchronous with
the reference.

      There are three controls for the oscillator.  The first
controls the frequency or how often the deviation occurs.  The second
controls the length in time of the deviation.  The third controls the
size of the deviation.  Thus, the oscillator produces the pulse train
at the specified rate.  Then, when the first control is activated, a
positive or negative delay is inserted before the next pulse.  The
oscillator then continues to produce pulses at the original rate, but
timed to the displaced pulse.  When the second control is activated,
the inserted delay is removed and the pulse train returns to its
original timing.

      The timing of the pulse train is regulated by the iteration of
these first two controls.  The third control regulates the amount of
the delay that is inserted or removed when the timing is changed.

      Disclosed anonymously.