| 摘要 |
A novel switching amplification apparatus capable of reducing a power source switching noise, thereby improving quality. The switching amplification apparatus includes a modulator for modulating an analog signal or a multi-bi t digital signal into a binary signal, a power amplifier (1) for supplying the output pulse signal from this modulator to a power switch element (3), and a .DELTA..SIGMA. power source (5) having .DELTA..SIGMA. modulation means, so that the output pulse signal of the modulator of the power amplifier (1) is supplied to the .DELTA..SIGMA. power source (5) and the pulse signal is inpu t to the .DELTA..SIGMA. power source (5) as an operation clock of the .DELTA..SIGMA. power source (5), subjected to the .DELTA..SIGMA. modulation, and supplied to the power switch element (3).
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