System for non linearity correction by intermediate...

Details System for non linearity correction by intermediate... System for non linearity correction by intermediate...

H - Electricity

04

N

350/48

H04N 5/217 (2006.01) H04N 5/38 (2006.01)

Patent

CA 1202412

A SYSTEM FOR NON LINEARITY CORRECTION BY INTER- MEDIATE FREQUENCY PREMODULATION IN TELEVISION EQUIPMENT ABSTRACT OF THE DISCLOSURE In equipment for transmitting or re-transmitting television signals comprising, in the intermediate frequency stage, group propagation time correction cells for linear- izing the phase-frequency characteristic of the equipment, the non linearity correction system of the invention uses these cells while completing them with an amplitude pre-modulation control circuit and/or a frequency pre- modulation control circuit, for correcting amplitude and phase non linearities affecting the pole carrier frequencies of the correction cells.

420177

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