Patent ID: 6975843

Claim:
A transmitter for transmitting a telecommunications signal, the transmitter having an input for an input signal and an output for a load, said transmitter comprising: a controlled self-oscillating modulator for pulse width modulating the input signal, said controlled self-oscillating modulator comprising a comparator and means for generating controlled self-oscillations; a switching stage for amplification of the pulse width modulated signal, thus generating an amplified pulse width modulated signal; a low pass demodulation filter for demodulating the amplified pulse width modulated signal, thus obtaining an output signal to be fed to said transmitter output; a feedback loop from the filter to the transmitter input; and means for adjusting an output impedance of the transmitter, wherein the controlled self-oscillating modulator and the switching stage forms a controlled self-oscillation loop, where the controlled self-oscillating modulator receives the amplified, pulse width modulated signal output by the switching stage and provides the pulse width modulated output signal as a positive feedback to the input of the switching stage, and wherein said controlled self-oscillation loop is connected in series to the input of the transmitter and the demodulation filter.