Patent ID: 7064611

Claim:
A I DSS RF amplifier, comprising: a first stage amplifier having a first transistor, comprising the grounded source terminal and the gate terminal grounded through a first choke; and a second stage amplifier having a second transistor, comprising the grounded source terminal and the gate terminal grounded through a second choke; wherein the first and the second stage amplifier have the same topology except matching circuits, the first choke and the second choke do not include bypass capacitors so that the gate terminals of the first transistor and the second transistor are grounded in DC paths, as well as the drain terminal of the first transistor is grounded by series of a fourth resistor and a first capacitor, and further is connected to a first DC power supply through a first resistor and a second RF choke in which a node between the first resistor and the second RF choke is grounded by a second capacitor.