Title :
A 120dB dynamic range 400mW class-D speaker driver with 4th-order PWM modulator
Author :
Wang, Minsheng ; Jiang, Xicheng ; Song, Jungwoo ; Brooks, Todd
Author_Institution :
Broadcom Corp., Irvine, CA, USA
Abstract :
A 400 mW class-D speaker driver is implemented in 65 nm CMOS technology, using a 4th-order digital PWM modulator to eliminate the DAC and minimize the effects of analog imperfection. It achieves 120 dB dynamic range with up to 88% power efficiency while driving an 8 Omega speaker load.
Keywords :
CMOS integrated circuits; amplifiers; driver circuits; pulse width modulation; 4th-order digital PWM modulator; CMOS technology; class-D speaker driver; power 400 mW; resistance 8 ohm; size 65 nm; CMOS technology; Digital modulation; Dynamic range; Pulse width modulation;
Conference_Titel :
Custom Integrated Circuits Conference, 2009. CICC '09. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-4071-9
Electronic_ISBN :
978-1-4244-4073-3
DOI :
10.1109/CICC.2009.5280912
