Patent ID: 7049891

Claim:
A circuit comprising: an amplifier circuit having a gain and an input port for receiving of a RF input signal and having an output port for providing of a RF output signal, the amplifier circuit comprising: an amplifying portion including at least a first transistor coupled with the input port and with the output port for receiving of the RF input signal and for providing an amplified version of the RF input signal as the RF output signal at the output port; a bias boost circuit coupled with the amplifying circuit for biasing of the first transistor comprising; a bias boost circuit coupled with the at least first transistor for providing a variable bias current to the at least first transistor in dependence upon a signal power of the RF output signal; circuitry for providing current pulses that vary in magnitude in proportion to the signal power of the RF output signal to one of base and gate terminals of the at least first transistor; and, a filter circuit coupled with the at least first transistor and the bias boost circuit for filtering the current pulses to provide an augmented DC bias current to the one of a gate and a base terminal of the at least first transistor that is higher than a bias current resulting from an autobias effect for the at least first transistor.