BLACK-AND-WHITE TELEVISION SYSTEM WITH COMMON CARRIER FOR VIDEO AND AUDIO SIGNALS

摘要

the invention relates to a black and white television system with a common carrier frequency for the video and audio signal in which the modulator is constituted of two transistors modulation complementare complementary pnp and npn in which applies signals via the second diode modulatore fitted properly and exactly a signal in the first semiperioada,and the other signal in the second semiperioada,the signal obtained at the exit tranzistoarelor modules being applied to floors and sumate amplification in a transformer in the second hand which obtain useful signal.and the demodulation signals will be detected properly by two diodes and integrated by a circuit rc out who will get two useful signals.