Patent ID: 6741132
Filing Date: 2004-05-25
Classification: H03F

Abstract:
A low noise amplifier circuit including:a first amplifier comprising an output stage; a first Miller capacitor having a first electrode and a second electrode, said first and second electrodes of said first Miller capacitor being connected to an input and an output of said output stage of the first amplifier, respectively; a second amplifier comprising an output stage; and a second Miller capacitor having a first electrode and a second electrode, said first and second electrodes of said second Miller capacitor being connected to an input and an output of said output stage of the second amplifier, respectively; wherein the amplifier circuit comprises: a first trimming capacitor having a first electrode and a second electrode, said first electrode being connected to said first electrode of said first Miller capacitor; a second trimming capacitor having a first electrode and a second electrode, said first electrode being connected to said first electrode of said second Miller capacitor; and a cascode stage having an input and an output, said cascode stage input being connected to a midpoint of a resistive bridge connected between the output of said first amplifier and the output of said second amplifier; said output of the cascode stage being connected to the second electrode of said first and second trimming capacitors.