The transmitter for advanced short wave broadcast which is optimized in digital broadcast

摘要

(57) Abstract As for this invention, through the driving device (2), the grid is driven by variable phase, the anode amplitude the coming out tube of force which is modulated regards the transmitter which (1) is possessed the modulator (3) with the output signal. Phase and amplitude of the signal where the coming out tube of force (1) is given to the grid and the anode display the phase and amplitude of the complex signal which it should transmit. In order expansion quality of the transmitter to possess linearity completely with the amplitude of the transmission signal, when the driving device (2) has linear amplification quality low vis-a-vis the transmission signal of level, amplitude of the transmission signal exceeds specified threshold, it operates with saturation mode. To apply to the short wave transmitter it is possible this invention.