Patent ID: 8149908

Claim:
A device for generating a modulation signal for an RF pulse transmitter comprising at least one amplifier, the device comprising: a detector coupled to an output of the at least one amplifier; a video amplifier coupled to an output of the detector; an analog processing device coupled to the video amplifier and configured to generate at least one information cue based on an output signal from the video amplifier; and a modulation signal generating device configured to receive the information cue from the analog processing device and to output the modulation signal to the RF pulse transmitter, the modulation signal generating device comprising: a digital processing device configured to receive a transmission synchro signal and the information cue and to generate a first control signal and a second control signal; and a signal generating device configured to generate a variable-amplitude Gaussian-shaped signal in response to the first control signal, to generate a variable-amplitude square-shaped signal in response to the second control signal, and to generate the modulation signal according to the Gaussian-shaped signal and the square-shaped signal, wherein the signal generating device comprises an analog switch and a digital potentiometer arranged for generating the square-shaped signal.