Hysteresis-Current-Controlled Class-D Amplifier with Active Current Sensing Techniques

A hysteresis-current-controlled (HCC) class-D amplifier with active current sensing techniques is presented in this paper. The active current sensing techniques are used to sense and control inductor current. The class-D amplifier has been fabricated in 3.3-V, 0.35-mum double-poly quadruple-metal CMOS technology. The proposed class-D amplifier is suitable for current-mode and voltage-mode applications.

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