Patent ID: 6842076
Filing Date: 2005-01-11
Classification: H01L,H03F

Abstract:
1. A radio frequency power amplifier module comprising: a first transistor to amplify a signal inputted through an input or inter-stage impedance matching circuit, and output a first amplified signal; a second transistor to amplify the first amplified signal inputted through an output terminal of said first transistor, and output a second amplified signal; a third transistor to drive the first transistor; a first terminal to supply a driving voltage to an output terminal of said second transistor; a first interconnection to couple said first terminal and the output terminal of said second transistor; a second terminal to supply a driving voltage to an output terminal of said third transistor; a second interconnection to couple said second terminal and the output terminal of said third transistor; and a first ground part for electromagnetic shield provided between said first and second interconnections.