Semiconductor integrated circuit and transmitter apparatus having the same

A semiconductor integrated circuit for receiving a parallel data signal and a first clock signal and outputting a serial data signal and a second clock signal, comprising:

• a clock generation circuit for receiving the first clock signal and producing a third clock signal obtained by multiplying the first clock signal by N, where N is an integer of 1 or more;
• and
• a parallel/serial conversion section for receiving the parallel data signal and converting the parallel data signal to the serial data signal in synchronism with the third clock signal,
• wherein a transmission characteristic of the clock generation circuit varies according to a control signal given thereto.

A semiconductor integrated circuit for receiving a parallel data signal and a first clock signal and outputting a serial data signal and a second clock signal, comprising:

• a first clock generation circuit for receiving the first clock signal and producing a third clock signal obtained by multiplying the first clock signal by X/Y, where X and Y are natural numbers and X≠Y;
• a scaler for receiving the parallel data signal and converting the parallel data signal to a second parallel data signal in synchronism with the third clock signal;
• a second clock generation circuit for receiving the third clock signal and producing a fourth clock signal obtained by multiplying the third clock signal by N, where N is an integer of 1 or more;
• and
• a parallel/serial conversion section for receiving the second parallel data signal and converting the second parallel data signal to the serial data signal in synchronism with the fourth clock signal.