Redundant clock source
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United States of America Patent
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Jul 8, 2008
Grant Date -
Mar 11, 2004
app pub date -
Sep 11, 2002
filing date -
Sep 11, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A redundant clock source provides a stable clock source for digital system. The clock source uses two oscillators to generate a clock signal. If one of the oscillators fails, the clock signal is generated from the other oscillator until the failed oscillator is replaced. Special filtering of the waveforms produced by the oscillators makes the clock source is resistant to jitter from the oscillators and transients that occur when an oscillator fails. This allows the clock source to not only use a redundant oscillator in an attempt to eliminate a single point of failure, but to also provide a stable clock signal even if one oscillator fails.
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