Patent ID: 8279003
Filing Date: 2012-10-02
Classification: H03F

Abstract:
1. An RF amplifier comprising: first and second branches coupled in parallel between a first supply voltage terminal and a second supply voltage terminal, said branches defining a differential pair arranged to be controlled by a differential input signal comprised of first and second input signals, the differential pair comprising a first transistor in said first branch and a second transistor in said second branch, wherein said first and second transistors each comprise first and second main current terminals, said second main current terminal of said first transistor being coupled by a first capacitor to the first main current terminal of said second transistor, and said second main current terminal of said second transistor being coupled by a second capacitor to the first main current terminal of said first transistor, said first or second main current terminals of the first and second transistors being coupled to differential output nodes of said RF amplifier, wherein said first branch comprises a first resistor coupled between said first main current terminal of the first transistor and the second capacitor, and said second branch comprises a second resistor coupled between said first main current terminal of said second transistor and the first capacitor.