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A 5.2mW, 0.0016% THD up to 20kHz, ground-referenced audio decoder with PSRR-enhanced class-AB 16Ω headphone amplifiers

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2 Author(s)
Shon-Hang Wen ; MeditTek Inc. Hsin-Chu, Taiwan ; Cheng-Chung Yang

A low-power ground-referenced audio decoder with PSRR-enhanced class-AB headphone amplifiers presents <;0.0016% THD in the whole audio band against the supply ripple by a negative charge-pump. Realized in the 40nm CMOS, the fully-integrated stereo decoder achieves 91dB SNDR and 100dB dynamic range while driving a 16Ω headphone load and consumes 5.2mW from a 1.8V power supply. The core area is 0.093mm2/channel only.

Published in:

2012 Symposium on VLSI Circuits (VLSIC)

Date of Conference:

13-15 June 2012