A 60mW 1.15mA/channel Class-G Stereo Headphone Driver with 111dB DR and 120dB PSRR
- Resource Type
- Conference
- Authors
- Galal, Sherif; Zheng, Hui; Abdelfattah, Khaled; Chandrasekhar, Vinay; Mehr, Iuri; Chen, Alex Jianzhong; Platenak, John; Matalon, Nir; Brooks, Todd L.
- Source
- 2011 IEEE Custom Integrated Circuits Conference (CICC) Custom Integrated Circuits Conference (CICC), 2011 IEEE. :1-4 Sep, 2011
- Subject
- Components, Circuits, Devices and Systems
Headphones
Charge pumps
Power amplifiers
Capacitors
Batteries
Power generation
Noise
- Language
- ISSN
- 0886-5930
2152-3630
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 2.3mm 2 in 0.18µm CMOS technology.