DocumentCode :
3471782
Title :
Switching Amplifier and Its Future
Author :
Liu, Bill Yang
Author_Institution :
Analog Devices, Shanghai Design Center
fYear :
2006
fDate :
23-26 Oct. 2006
Firstpage :
1684
Lastpage :
1687
Abstract :
Switching amplifier, normally called ClassD amplifier has become increasingly popular in Audio application because of its significantly high efficiency(>80%) and improved linearity gained by a servo modulator loop like PDM and PWM. But, switching amplifier also contains many tough issues needed to be solved to really replace other conventional linear amplifiers. EMI, big ripple current, low PSRR, over current damage... all these have a big impact on the performance of switching amplifier and limits its implemental applications. But, attracted by its high efficiency, digital-friendly interface and easier integration in fine geometry process, lots of creative design ideas have been invented to improve its performance. With all this efforts, switching amp is showing a big potential to be implemented into many applications, will have a foreseeable bright future
Keywords :
amplifiers; analogue circuits; audio equipment; integrated circuit design; ClassD amplifier; EMI; PDM; PSRR; PWM; audio application; big ripple current; digital-friendly interface; fine geometry process; integration; linear amplifier; linearity; over current damage; servo modulator loop; switching amplifier; Electromagnetic interference; Energy consumption; High power amplifiers; Linearity; Power amplifiers; Pulse amplifiers; Pulse width modulation; Rail to rail amplifiers; Rail to rail outputs; Switches;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0160-7
Electronic_ISBN :
1-4244-0161-5
Type :
conf
DOI :
10.1109/ICSICT.2006.306372
Filename :
4098511
Link To Document :
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