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

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

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 swit...

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Bibliographische Detailangaben
Hauptverfasser: Yong-Hee Lee, Chun-Kyun Seok, Bong-Joo Kim, Seung-Bin You, Wang-Seup Yeum, Ho-Jin Park, Byeong-Ha Park
Format: Tagungsbericht
Sprache:eng
Schlagworte:
audio DAC
Calibration
Driver circuits
Headphones
Pulse width modulation
Pulse width modulation converters
Signal to noise ratio
true-GND and asymmetric PWM
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Beschreibung
Zusammenfassung: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.
DOI:10.1109/SOCDC.2010.5682904