| 摘要 |
PURPOSE: A headphone driver is provided to improve the characteristics of audio output by configuring a simple circuit without a condenser of high capacitance. CONSTITUTION: A headphone driver(300) includes an amplifier(60) which outputs an audio signal to a headphone after amplification, and a power supply circuit(50) which supplies power to the amplifier. The power supply circuit supplies the positive power of preset first level to a positive power input terminal. In addition, the power supply circuit supplies the negative power of a preset second level to a negative power input terminal. The power supply circuit comprises a charging unit, a positive power generating unit and a MOS switch. |
