Design of Three-Stage Class-AB 16 $Omega$ Headphone Driver Capable of Handling Wide Range of Load Capacitance Academic Article uri icon

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 Ω headphone driver designed using the proposed scheme in 0.13 μm 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. © 2009 IEEE.

altmetric score

  • 3

author list (cited authors)

  • Dhanasekaran, V., Silva-Martinez, J., & Sánchez-Sinenco, E.

citation count

  • 38

publication date

  • June 2009