| 摘要 |
An optical modulator driver circuit (1) includes an amplifier (50, Q10, Q11, R10 - R13), and a current amount adjustment circuit (51) capable of adjusting a current amount of the amplifier (50) in accordance with a desired operation mode. The current amount adjustment circuit (51) includes at least two current sources (IS10) that are individually ON/OFF-controllable in accordance with a binary control signal representing the desired operation mode. |
