Patent ID: 7078974

Claim:
A high-frequency power amplifier module to be used in a cellular phone, the high-frequency power amplifier module comprising: a first power transistor having a control terminal and an output terminal; a first capacitor having a first end coupled to receive a high frequency signal to be amplified by the first power transistor and a second end coupled to the control terminal of the first power transistor; a first transistor having an input terminal and a control terminal directly coupled to each other, the control terminal thereof being coupled to the control terminal of the first power transistor; a second capacitor having a first end coupled to an output terminal of the first power transistor and a second end; a second power transistor having a control terminal coupled to the second end of the second capacitor and an output terminal; a second transistor having an input terminal and a control terminal coupled to each other, the control terminal thereof being coupled to the control terminal of the second power transistor; a first bias circuit which provides a first bias current to the input terminal of the first transistor; a second bias circuit which provides a second bias current to the input terminal of the second transistor.