| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital amplifier for reducing a DC component of an amplified pulse width modulated signal, and to provide a method for reducing the DC component of the amplified pulse width modulated signal applied to a reference voltage generator and an input node of a load. SOLUTION: The digital amplifier includes a pulse width modulation signal generator, a filter, and a reference voltage generator. The pulse width modulation signal generator receives an input signal and outputs an amplified pulse width modulated signal. The filter filters the amplified pulse width modulated signal and provides the filtered amplified pulse width modulated signal to an input node of a load. The reference voltage generator provides a reference voltage, corresponding to an intermediate value between a maximum voltage and a minimum voltage of the filtered pulse width modulated signal, to a reference node of the load to reduce a DC component of the filtered amplified pulse width modulated signal. COPYRIGHT: (C)2008,JPO&INPIT
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