Patent ID: 7301400

Claim:
A mobile terminal comprising: circuitry adapted to provide a transmit signal; a power amplifier adapted to amplify the transmit signal based on a supply voltage and provide an amplified transmit signal to an antenna for transmission; a multi-phase DC-DC converter adapted to provide the supply voltage to the power amplifier based on a source voltage and a set-point voltage; a multi-phase converter control system adapted to provide a plurality of control signals based on the set-point voltage and the supply voltage; voltage error amplification circuitry adapted to compare a voltage feedback signal indicative of the supply voltage and the set-point voltage and provide a voltage error signal based on a difference between the voltage feedback signal and the set-point voltage; modulation circuitry adapted to receive the error signal and each of a plurality of clock signals and provide each of the plurality of control signals based on a comparison of each of the plurality of clock signals and the error signal, wherein each of the clock signals is out-of-phase with a first of the plurality of clock signals by multiples of 360°/N and N is the number of control signals in the plurality of control signals; and a multi-phase power train adapted to generate a plurality of currents each based on a corresponding one of the plurality of control signals and provide the plurality of currents to a first terminal of an output capacitor, wherein the plurality of currents charge the output capacitor such that the supply voltage is provided across the output capacitor, and wherein the multi-phase converter control system is further adapted to provide the plurality of control signals such that each of the plurality of control signals is out-of-phase with a first of the plurality of control signals by multiples of 360°/N, where N is a number of control signals in the plurality of control signals and thus a number of phases in the multi-phase power train.