Design a New Architecture of Audio Amplifier Class-D for Cellular Phones
نویسنده
چکیده
This paper presents a new architecture of class D audio amplifier with 0.4 W output power and 95% efficiency with an 8 ohm load. This class D uses a pulse width modulation scheme that eliminates the output filter. It operates with a 2.4 V to 5V supply voltage. The fully differential class-D audio amplifier is implemented with a TSMC 0.13-um 2P4M CMOS process, and the chip area is 325 x 300 um2. It has a THD as low as 0.04%, with a flatband response between 20 Hz and 20 kHz.
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