RC oscillator with compensation delay
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United States of America Patent
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Nov 28, 2023
Grant Date -
N/A
app pub date -
Oct 4, 2022
filing date -
Jun 6, 2022
priority date (Note) -
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Abstract
According to at least some example embodiments of the inventive concepts, an RC oscillator includes an oscillator core including a timing-circuit that includes a plurality of matched current sources, a plurality of capacitors, and a resistor, a first continuous time comparator, and a Schmitt trigger; and an analog circuit connected to the oscillator core including a second continuous time comparator representing a replica of the first continuous time comparator, and an EX-OR gate, wherein the analog circuit is configured to pass a clock signal of the oscillator core through the second continuous time comparator and obtaining a delayed clock signal representing a comparator delay, extract the comparator delay of the first continuous time comparator based on feeding the clock signal and the obtained delayed clock signal to the EX-OR gate, and charge the plurality of capacitors connected to the first continuous time comparator.
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