CRYSTAL OSCILLATOR CIRCUIT WITH REDUCED STARTUP TIME
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United States of America Patent
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N/A
Issued Date -
Apr 7, 2016
app pub date -
Oct 6, 2014
filing date -
Oct 6, 2014
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A crystal oscillator achieves fast start-up by injecting an in-band periodic signal into the crystal oscillator driver circuit. The in-band periodic signal has a frequency that is within a bandwidth of the crystal oscillator. Injection of the in-band periodic signal begins in response to a power-up condition and stops after a predetermined time period corresponding to the amount of time it takes to ensure the crystal driver is achieving full swing.
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