Design of Three-Stage Class-AB 16 Headphone Driver Capable of Handling Wide Range of Load Capacitance
BibTeX
@MISC{Dhanasekaran_designof,
author = {Vijay Dhanasekaran and Jose Silva-martinez and Senior Member and Edgar Sánchez-sinenco},
title = {Design of Three-Stage Class-AB 16 Headphone Driver Capable of Handling Wide Range of Load Capacitance},
year = {}
}
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Abstract
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 headphone driver designed using the proposed scheme in 0.13 m 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. Index Terms—Class-AB amplifiers, class-AB drivers, audio power amplifiers, headphone drivers, multi-stage amplifiers, capacitive loaded amplifiers. Fig. 1. 16 driver configuration. I.
