| 摘要 |
PROBLEM TO BE SOLVED: To provide a class D amplifier circuit capable of ideally dispensing with filters, or the like. SOLUTION: The class D amplifier circuit simultaneously generates a first pulse width modulation signal (Pa) and a second pulse width modulation signal (Pb). In this case, a rising point in a narrow pulse signal in the second pulse width modulation signal is delayed from that of a wide pulse signal in the first pulse width modulation signal, and the falling point in a narrow pulse signal is earlier than that of the wide pulse signal. Meanwhile, a rising point in a narrow pulse signal in the first pulse width modulation signal is delayed from that of a wide pulse signal in the second pulse width modulation signal, and the falling point in a narrow pulse signal is earlier than that of the wide pulse signal. Thus, an output signal (OUT) becomes a signal, where two pulses projecting to a plus-side and two pulses projecting to a minus-side are repeated alternately. COPYRIGHT: (C)2011,JPO&INPIT
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