| 摘要 |
A communication semiconductor integrated circuit, has: a first computing element which adds the count value and the phase difference value and outputs a first computed value as an addition result; a second computing element which adds set frequency data obtained by dividing a carrier frequency by a reference frequency of the reference signal and modulation frequency data obtained by dividing a modulation frequency by the reference frequency, and outputs a second computed value as an addition result; a third computing element which subtracts the second computed value from the first computed value and outputs a third computed value as a subtraction result, the third computed value being a phase error; and a fourth computing element which adds the carrier frequency control value and the modulation frequency control value, and outputs the oscillator tuning word as an addition result. |
