Patent ID: 7307478
Filing Date: 2007-12-11
Classification: H03G

Abstract:
1. An adjustable power amplifier comprises: an input capacitor having a first plate and a second plate, wherein the first plate of the input capacitor is operably coupled to receive an input radio frequency (RF) signal; an input transistor having a gate, a drain, and a source, wherein the gate of the input transistor is operably coupled to the second plate of the input capacitor and the source of the input transistor is operably coupled to a circuit ground; an inductor having a first node and a second node, wherein the first node of the inductor is operably coupled to a power supply and the second node of the inductor is operably coupled to the drain of the input transistor; an output capacitor having a first plate and a second plate, wherein the first plate of the output capacitor is operably coupled to the drain of the input transistor and the second node of the output capacitor provides an output of the adjustable power amplifier; a gain adjust module having a first node and a second node, wherein the first node of the gain adjust module is operably coupled to the gate of the input transistor and the second node of the gain adjust module is operably coupled to the circuit ground, wherein the gain adjust module adjusts gain of the adjustable power amplifier in accordance with an operational-based control signal to maintain linearization of the adjustable power amplifier; and a second gain adjust module having a first node and a second node, wherein the first node of the second gain adjust module is operably coupled to the first plate of the output capacitor and the second node of the second gain adjust module is operably coupled to the circuit ground, wherein the second gain adjust module further adjusts the gain of the adjustable power amplifier in accordance with the operational-based control signal.