A method and system for minimizing power consumption in a communication system is provided. The method may include adjusting the supply voltage of pre-driver for a power amplifier, which may be used for amplifying a RF signal, in proportion to the envelope of the baseband of the RF signal. The signals may correspond to a variety of communication protocols. For example, WCDMA, HSDPA, HSUDPA, GSM, GPRS, EDGE, WiMAX, OFDM, UWB, ZigBee, and BlueTooth. The signal may be delayed by a number of samples before being input into the pre-driver. The envelope may be measured by evaluating a plurality of I and Q samples from the signal. The number of samples may be calculated by measuring the intermodulation distortion at the output of the amplifier. The supply voltage may be generated by a switching regulator. The method may also include adjusting a supply voltage and bias voltage for a power amplifier in proportion to said envelope of said signal.