RING OSCILLATOR AND METHOD FOR STARTING RING OSCILLATOR
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United States of America Patent
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Issued Date -
Oct 6, 2022
app pub date -
Mar 23, 2022
filing date -
Mar 30, 2021
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Abstract
A ring oscillator including: an oscillation circuit including an even number of inverters connected in a ring configuration, the oscillation circuit outputting a clock signal; plural potential fixing circuits respectively connected between pairs of the inverters, each of plural potential fixing circuits being switchable between a connected and a disconnected state in response to a first control signal; and an adjustment circuit that adjusts a drive capability of the inverters based on a second control signal, wherein, during startup, the drive capability is controlled to be a first capability, in which the potential fixing circuits are connected, by the first control signal, and wherein, after a predetermined time has elapsed after the first control signal is output, the drive capability is controlled to be a second capability, higher than the first capability, in which the potential fixing circuits are disconnected, by the second control signal.
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