A 1.2mW 1.6Vpp-Swing Class-AB 16?? Headphone Driver Capable of Handling Load Capacitance up to 22nF

摘要

We present a compensation scheme with a damping circuit that automatically adjusts according to the load condition to overcome this problem and still maintain the power efficiency improvement over NMC. Capacitive loads as large as 20nF are used in some platforms for ESD protection and EMI suppression. Several compensation schemes for 3-stage amplifiers driving large capacitive loads with power efficiency more than 10 times that of the conventional nested Miller compensation (NMC) scheme have been reported recently.