Patent ID: 7948316
Filing Date: 2011-05-24
Classification: H03F

Abstract:
1. An amplifier comprising: an output portion that sources and sinks current associated with an output load, wherein the output portion includes a metal oxide field effect transistor (MOSFET); an amplification portion that is biased by a relatively small bias current with respect to an output current of the amplifier, wherein the amplification portion provides an amplified output signal to the output portion, and wherein an inner pole is formed from an output resistance of the amplification portion and an input capacitance of the MOSFET, and wherein an outer pole is formed from an output resistance of the MOSFET and an output capacitor coupled to an output of the amplifier; and an impedance component coupled between the output portion and the amplification portion to alter a pole associated with the amplifier to mitigate instability of the amplifier related to the relatively small bias current.