Design of Three-Stage Class-AB 16 Omega Headphone Driver Capable of Handling Wide Range of Load Capacitance
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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. 2009 IEEE.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
author list (cited authors)
Dhanasekaran, V., Silva-Martinez, J., & Sanchez-Sinencio, E.
complete list of authors
Dhanasekaran, Vijay||Silva-Martinez, Jose||Sanchez-Sinencio, Edgar