Patent ID: 6107880
Filing Date: 2000-08-22
Classification: H03F

Abstract:
A method for increasing the linearity of the phase and gain of an amplifier circuit comprising the steps of:receiving an input signal to be amplified;detecting the power level of the input signal;determining a supply voltage level for maintaining the linearity of an amplified output signal, based upon the power level of the input signal;adjusting the supply voltage of the amplifier to the determined supply voltage level at the same time the corresponding input signal is received at the input of the amplifier; andamplifying the input signal for producing a linear amplified output signal; anddelaying the input signal prior to the input signal being received by the amplifier; wherein the amplifier comprises an LDMOS transistor having a drain connection and a gate connection; and further wherein a first DC blocking capacitor is coupled between the gate connection of the LDMOS and the input.