Invention Grant
US08212612B2 Closed-loop class-D amplifier with modulated reference signal and related method 有权
具有调制参考信号的闭环D类放大器及相关方法

Closed-loop class-D amplifier with modulated reference signal and related method
Abstract:
Disclosed is a closed-loop class-D amplifier circuit including a modulated reference signal generator that provides a modulated reference signal in a feed-forward path, where the reference signal is modulated corresponding to an input signal. The closed-loop class-D amplifier circuit further includes a comparator to generate a control signal based on a comparison of the modulated reference signal and a correction signal, which in turn is produced by filtering a combination of the input signal and a feedback signal. The closed-loop class-D amplifier circuit also includes a pulse generator to generate a pulse-width-modulated signal to drive an output stage of the closed-loop class-D amplifier based on the control signal.
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