Patent ID: 6970039
Filing Date: 2005-11-29
Classification: H03F

Abstract:
1. An integrated circuit amplifier comprising: a signal input element for receiving an input signal; a main amplifying element having an input and an output wherein the input is operatively coupled to receive the input signal; a phase shifting element having an input and an output wherein the input is operative connected to receive the input signal and the phase shifting element is suitably adapted to create a phase shifted signal from the input signal; an auxiliary amplifying element having an input and an output wherein the input is operatively coupled to receive the phase shifted signal from the phase shifting element; an impedance transformer element having an input and an output wherein the input is operatively coupled to receive the main amplifier output; and a signal output element coupled to the output of the auxiliary amplifier and the output of the impedance transformer element for providing an output of the integrated circuit amplifier, wherein the auxiliary amplifying element includes a bias circuit for biasing an amplifier transistor having a control terminal, a current-sink terminal, and a current-source terminal; wherein the bias circuit comprises: a bias transistor including a control terminal, current-sink terminal, and a current-source terminal; a first DC input port connected to the current sink terminal of the bias transistor; a first resonator element operatively coupled to the current-sink terminal of the bias transistor and ground; a second DC input port connected to the control terminal of the bias transistor; a diode element operatively coupled to the control terminal of the bias transistor and ground; a second resonator element operatively coupled to the control terminal of the bias transistor and ground; and a resistive element operatively coupled to the current source terminal of the bias transistor and the control terminal of the amplifier transistor.