Clock integrated circuit including heterogeneous oscillators and apparatus including the clock integrated circuit
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United States of America Patent
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Nov 7, 2023
Grant Date -
Dec 22, 2022
app pub date -
Jun 21, 2022
filing date -
Jun 22, 2021
priority date (Note) -
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Abstract
A clock integrated circuit is provided. The clock integrated circuit includes: a first clock generator which includes a crystal oscillator configured to generate a first clock signal; and a second clock generator which includes a resistance-capacitance (RC) oscillator and a first frequency divider, and is configured to: generate a second clock signal using the first frequency divider based on a clock signal output from the RC oscillator; perform a first calibration operation for adjusting a frequency division ratio of the first frequency divider to a first frequency division ratio based on the first clock signal; and perform a second calibration operation for adjusting the first frequency division ratio to a second frequency division ratio based on a sensed temperature.
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