Patent ID: 6774726
Filing Date: 2004-08-10
Classification: H03F

Abstract:
An amplifier including first, second, and third series-connected stages, the third stage including a MOS output transistor having its source or drain forming an output terminal of the amplifier, the amplifier further including a first capacitance between the output terminal and the input of the second stage, and a second capacitance between the output terminal and the output of the second stage, the amplifier including:means for detecting the transition from a first operating state of the output transistor, in which the drain current varies little with the voltage between the drain and the source, to a second state, in which the drain current varies substantially proportionally to the voltage between the drain and the source; and means for, upon detection of such a transition, having the voltage gain of the amplifier and/or the product between the bandwidth of the amplifier and the voltage gain of the amplifier at the upper limit frequency of the bandwidth drop.