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This brief presents a low-power low-distortion high-efficiency class-D audio amplifier. The proposed architecture uses an integral sliding mode controller with a novel on-chip continuous current sensor. A full-bridge output stage is used to increase the output power, and an adaptive nonoverlapping-clock generation technique is presented to eliminate the short circuit current. Moreover, the switching...
This paper presents the design of a novel integrated continuous current sensor (CCS) circuit for class-D audio amplifier and current mode controlled DC-DC converter. The proposed current sensor has the capability of sensing either positive or negative current of off-chip inductor continuously. Additionally, fast transient response with low quiescent current has been achieved. Furthermore, a calibration...
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