DocumentCode :
919811
Title :
Design of Three-Stage Class-AB 16 
Headphone Driver Capable of Handling Wide Range of Load Capacitance
Author :
Dhanasekaran, Vijay ; Silva-Martinez, Jose ; Sanchez-Sinencio, Edgar
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX
Volume :
44
Issue :
6
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
1734
Lastpage :
1744
Abstract :
In this paper, the effect of load capacitance variation on the location of the closed loop poles of three-stage amplifiers is analyzed and a frequency compensation scheme that automatically adjusts the damping factor according to the load capacitance is proposed. A class-AB 16 Omega headphone driver designed using the proposed scheme in 0.13 mum technology can handle 1 pF to 22 nF capacitive load while consuming as low as 1.2 mW of quiescent power. It can deliver a peak power of 40 mW (1.6 Vpp swing) to the load with - 84.8 dB THD and 92 dB peak SNR. It occupies 0.1 mm2 area.
Keywords :
audio-frequency amplifiers; power amplifiers; power 40 mW; resistance 16 ohm; size 0.13 mum; Capacitance; Damping; Driver circuits; Energy consumption; Equivalent circuits; Headphones; Load management; Peak to average power ratio; Performance gain; Power amplifiers; Class-AB amplifiers; audio power amplifiers; capacitive loaded amplifiers; class-AB drivers; headphone drivers; multi-stage amplifiers;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2009.2020461
Filename :
4982871
Link To Document :
