Patent ID: 9312822
Filing Date: 2016-04-12
CPC Classification: H01L,H03F

Claim Text:
1. Power amplifier circuit based on a cascode structure, wherein said circuit comprising at least a first transistor having a grid, source and drain terminal, said first transistor being connected in a common source mode; a second grid source transistor having grid, source and drain terminal, said second transistor being connected in a common grid mode; a first biasing circuit for biasing said first transistor; and a second biasing circuit for biasing said second transistor; and said second biasing circuit further includes a circuit for sensing a value of the power source voltage and for generating at least a first and a second biasing voltage for the grid of said second transistor in accordance with the sensed power source voltage, said first biasing voltage providing protection to said first and second transistors when said power source voltage is sensed to be at a high voltage and said second biasing voltage providing more voltage to said first transistor when said power source voltage is sensed to be at a low voltage.