A self-calibration 103-dB SNR stereo audio DAC with true-GND class-D headphone drivers in 45nm CMOS

Yonghee Lee,Chunkyun Seok,Bongjoo Kim,Seungbin You,Wangseup Yeum,Hojin Park,Byeongha Park

international soc design conference（2010）

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摘要

A stereo audio DAC with ground-centered class-D headphone drivers is fully integrated in a 45nm CMOS technology. A built-in self-calibration is proposed to minimize DC offset voltage causing static power dissipation. The asymmetric averaging PWM is also applied to improve linearity and suppress switching noise and loss. The measured SNR and DR are 103dB and 98dB, respectively.

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关键词

pulse width modulation,calibration,cmos technology,power dissipation,snr,signal to noise ratio

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