| 摘要 |
The device reduces the products of inter-modulation of the second order (between image and sound, between sound and chrominance, between image and chrominance) and the third order (between image, chrominance and sound) and interposes a corrector of linearity in front of the amplitude modulator which receives the correction signal of the effect on the sound and the transmodulation sound-image.- DETAILED DESCRIPTION - The device has a high-frequency power amplifier, a unit (32,36) for amplification in base band, the sound and image component of the signal to be amplified, a unit (38,24,22) for amplitude modulation of the sound component amplified by the amplified image component (30), for constituting a corrector signal pre-modulated by a video residue having a phase opposite to that of the interference of sound caused by the image in the power amplifier.There is a unit for adding the corrector signal to the high frequency composite sound and image signal, before transposition and amplification of the signal power
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