CPC H03B 5/32 (2013.01) [G06F 1/06 (2013.01); H03B 5/04 (2013.01); H03B 5/20 (2013.01); H03B 2200/0082 (2013.01)] | 20 Claims |
1. A clock integrated circuit comprising:
a first clock generator which comprises a crystal oscillator and is configured to use the crystal oscillator to generate a first clock signal; and
a second clock generator which comprises 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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