Patent ID: 7274252
Filing Date: 2007-09-25
Classification: H03F

Abstract:
1. A power amplification circuit comprising: an input and an output; a first circuit module comprising a first and a second transistor of a same first type and each having a first and a second main electrode and a control electrode, said first main electrodes of said first and second transistors being respectively connected to a first voltage supply terminal via first and second substantially identical resistors, the respective control electrodes of said first and second transistors being connected to each other, the control electrode of said first transistor being also connected to the second main electrode of said first transistor; a second circuit module comprising a third and a fourth transistor of a same second type opposite to the first type and each having a first and a second main electrode and a control electrode, said first main electrodes of said third and fourth transistors being respectively connected to a second voltage supply terminal by third and fourth substantially identical resistors, the respective control electrodes of said third and fourth transistors being connected to each other, the control electrode of said third transistor also being connected to the second main electrode of said third transistor; a current source connected to said second main electrodes of the first and third transistors; a push-pull module, wherein the push-pull module further comprises: a third circuit module having a first and a second input connected respectively to the second main electrode of said first intermediate transistor and to the first main electrode of said second transistor, and arranged such that an electric current flowing into said second input is identical to an electric current flowing into said first input, and a fourth circuit module having a first and a second output respectively connected to the second main electrode of said second intermediate transistor and to the first main electrode of said fourth transistor, and arranged such that an electric current flowing from said second output is identical to an electric current flowing from said first output.