Patent ID: 8451057

Claim:
A method of obtaining an output signal from a direct current (DC) voltage, wherein the output signal is a linearly amplified replica of an input signal having first and second polarities, comprising the steps of: receiving the input signal; transforming the input signal for generating a discrete time peak current signal, wherein said transforming is according to that when applying the direct current (DC) voltage to an inductor means, the energy stored in the inductor means is proportional to square of the peak current of the inductor means; switching a current from the direct current (DC) voltage to the inductor means and getting a feedback current signal by detecting the current of the inductor means, wherein said switching is according to the discrete time peak current signal and the feedback current signal; blocking a current from the inductor means to a filter when the current from the direct current (DC) voltage to the inductor means is switched on and conducting the current from the inductor means to the filter when the current from the direct current (DC) voltage to the inductor means is switched off; filtering said current from the inductor means for outputting the output signal by the filter.