Patent ID: 8416020

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; pulse modulating the input signal for getting a pulse modulated signal; switching at least one switch to get a pulsed voltage from the direct current (DC) voltage according to the pulse modulated signal; keeping the energy transmission from the pulsed voltage to the output signal during the switching off period of said switching via using at least one free-wheeling diode means coupled to said at least one switch to provide proper current path for the energy transmission; conducting said pulsed voltage positively or negatively to a filter according to the polarity of the input signal via a switching power transmitting unit comprising a plurality of switches; filtering said pulsed voltage positively or negatively conducted from the switching power transmitting unit for outputting the output signal by the filter.