| 摘要 |
To provide a new switching amplifier in which power supply switching noise is reduced to improve the quality. The switching amplifier is provided with a power amplifier (1) that has a modulator which modulates an analog signal or a multi bit digital signal into a two-level signal, and supplies an output pulse signal from this modulator to a power switching element (3); and a DELTA SIGMA power supply (5) which is provided with a DELTA SIGMA modulating device, and the construction is such that the output pulse signal from the modulator of the power amplifier (1) is supplied to the DELTA SIGMA power supply (5), and also the construction is such that the DELTA SIGMA power supply (5) receives the pulse signal as an operating clock, DELTA SIGMA modulates the received pulse signal, and supplies the DELTA SIGMA modulated pulse signal to the power switching element (3). <IMAGE> |
