Patent ID: 11863185
Assignee: LX SEMICON CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A semiconductor integrated circuit device, comprising:
an oscillator circuit, protected by a case, comprising:
an error correction circuit to store a first error correction value for correcting a frequency error of a clock signal when an ambient temperature of the case is a first temperature and a second error correction value for correcting the frequency error of the clock signal when the ambient temperature of the case is a second temperature, which is higher than the first temperature, to receive a temperature sensing value for the ambient temperature of the case from an external circuit, and to generate a third correction value corresponding to the temperature sensing value by using the first error correction value, the second error correction value, and the temperature sensing value; and
an oscillator to correct the frequency error of the clock signal according to the ambient temperature by setting at least one of a bias, a resistance value, and a capacitor value according to the third error correction value and to output the clock signal; and

a digital circuit, protected by the case, operating in synchronization with the clock signal,
wherein the third error correction value includes a first control code for a coarse adjustment of a frequency of the clock signal and a second control code for a fine adjustment of the frequency of the clock signal.