CMOS laddered inverter ring oscillator
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United States of America Patent
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May 30, 2023
Grant Date -
Sep 8, 2022
app pub date -
Mar 4, 2022
filing date -
Mar 4, 2021
priority date (Note) -
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Abstract
A ring oscillator includes a first set of at least three laddered inverter quantizer (LIQAF) circuits connected in stages that are in series, including a first LIQAF circuit and a last LIQAF circuit, and a feedback circuit from the last LIQAF circuit to the first LIQAF circuit having a logical NOT output compared to the first LIQAF circuit. A voltage input creates a pair of phase shifted waveforms in the first of the at least three LIQAF circuits that propagate sequentially through the stages of the at least three LIQAF circuits. Each stage has a pair of outputs to the next stage that are then phase shifted from the previous stage in the next stage.
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