Title :
A 130dB PSRR, 108dB DR and 95dB SNDR, ground-referenced audio decoder with PSRR-enhanced load-adaptive Class-G 16Ohm headphone amplifiers
Author :
Shon-Hang Wen;Chien-Ming Chen;Cheng-Chung Yang;Chieh-Hung Chen;Jia-Feng Jiang;Keng-Jan Hsiao;Cheng-Yu Chien
Author_Institution :
MediaTek Inc. Hsin-Chu, Taiwan
Abstract :
A Class-G headphone amplifier for Hi-Fi audio playback with high immunity to supply disturbance and Class-G switching noise is presented that achieves 130dB PSRR at 217Hz and higher than 100dB PSRR up to 20kHz. In addition, a Class-G amplifier with load-adaptive voltage supply rails selection and Class-G switching scheme improves the power efficiency for different impedances. Realized in 0.18μm CMOS, the decoder and amplifier together achieve 108dB DR and 95dB SNDR with a 16D headphone load.
Keywords :
"Impedance","Headphones","Charge pumps","Switches","Decoding","Rails","Detectors"
Conference_Titel :
Solid-State Circuits Conference (A-SSCC), 2015 IEEE Asian
DOI :
10.1109/ASSCC.2015.7387442
