Ring oscillator and method for controlling start-up of ring oscillator
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United States of America Patent
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Feb 9, 2021
Grant Date -
Feb 4, 2021
app pub date -
Mar 13, 2020
filing date -
Aug 2, 2019
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Abstract
A ring oscillator includes at least one oscillator stage having a first output and a second output and a start-up circuit. The start-up circuit includes a plurality of AC coupling capacitors receiving the first output and the second output, and a plurality of switches connected to the AC coupling capacitors. The start-up circuit is configured to provide a differential start-up voltage to at least one node of the oscillator using the plurality of switches and the AC coupling capacitors.
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