| 摘要 |
PURPOSE: A class D amplifier is provided to further reduce the DC error in a class D amplifier with DC feedback. CONSTITUTION: An invention concerns a class D amplifier in which a high-frequency reference signal(E) is pulse width modulated by an input signal, such as an audio signal, and in which there are generated a pair of bipolar pulse drive signals(I, J), comprising an error generator which forms a signal with an average value which corresponds to the DC component of the pulse drive signals, and which is fed back to the pulse width modulator for the adjustment of the modulator. The high-frequency reference signal(E) is generated from a first clock signal(A), and the individual pulses of the respective pulse drive signals are controlled via a second clock signal(C) which is derived from the first clock signal(A).
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