A Digital Input Controller for Audio Class-D Amplifiers with 100W 0.004% THD+N and 113dB DR

Concepts

EngineeringElectrical EngineeringAnalog ElectronicsLow-power DesignPower ElectronicsAnalog Integrated CircuitsAnalog IntegrationDigital Integrated Circuit DesignDigital Integrated CircuitsLow-power Digital Circuit DesignClass D AmplifiersDigital Input Output ControlPower Output

Abstract

A digital input controller for audio class-D amplifiers is presented. The controller utilizes specially configured integrated DAC and power stage feedback loop to suppress distortion components coming from power-stage switching with digital input capability. The class-D amplifier system with the controller and an existing power stage achieves 113dB DR, 0.0018% THD+N with 10W output power, and 0.004% THD+N with 100W output power into 4OΩ load

References

An integrated 200-w class-d audio amplifier

Marco Berkhout · IEEE Journal of Solid-State Circuits · 2003 · 159 citations

Engineering, Electrical Engineering, Analog Electronics +11

A multi-loop voltage feedback filterless class-D switching audio amplifier using unipolar pulse-width-modulation

Alejandro Oliva, Simon S. Ang, Tony Vo · IEEE Transactions on Consumer Electronics · 2004 · 49 citations · Full text

Engineering, Electrical Engineering, Analog Electronics +13

Integrated stereo Delta-Sigma class D amplifier

Eric Gaalaas, B.Y. Liu, Naoaki Nishimura · 2005 · 47 citations

Engineering, Electrical Engineering, Analog Electronics +15

PowerDAC: a single-chip audio DAC with a 70%-efficient power stage in 0.5 μm CMOS

K. Philips, J. van den Homberg, C. Dijkmans · 2003 · 31 citations

Engineering, Electrical Engineering, Analog Electronics +16