Title :
A 60mW 1.15mA/channel Class-G Stereo Headphone Driver with 111dB DR and 120dB PSRR
Author :
Galal, Sherif ; Zheng, Hui ; Abdelfattah, Khaled ; Chandrasekhar, Vinay ; Mehr, Iuri ; Chen, Alex Jianzhong ; Platenak, John ; Matalon, Nir ; Brooks, Todd L.
Author_Institution :
Broadcom Corp., Irvine, CA, USA
Abstract :
A 60mW 111dB DR Class-G Stereo Headphone Driver is described. The driver utilizes higher-order loop filter to achieve PSRR of 120dB at the GSM TDMA rate of 217Hz. A driver architecture that combines Class-G and a split Class-AB/B amplifier reduces the quiescent current to 1.15mA/channel. A dual-voltage charge-pump with a single flying capacitor enables Class-G operation by adjusting the supply rails as a function of the input signal. The driver supports battery range of 2.65V-4.5V and occupies an area of 2.3mm2 in 0.18μm CMOS technology.
Keywords :
CMOS analogue integrated circuits; amplifiers; capacitors; driver circuits; filters; headphones; CMOS technology; DR; DR Class-G stereo headphone driver; GSM TDMA; PSRR; current 1.15 mA; dual-voltage charge-pump; flying capacitor; frequency 217 Hz; higher-order loop filter; power 60 mW; size 0.18 mum; split Class-AB-B amplifier; supply rails; voltage 2.65 V to 4.5 V; Batteries; Capacitors; Charge pumps; Headphones; Noise; Power amplifiers; Power generation;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2011 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4577-0222-8
DOI :
10.1109/CICC.2011.6055310
