A signal hybrid device has a first dual gate FET 7 having input control terminals for receiving and hybridizing a video signal transmitted through an input terminal 19 and a blank signal from an OSD 5 through one of the input control terminals, a second dual gate FET 8 having input control terminals...http://www.google.fr/patents/US5734423?utm_source=gb-gplus-shareBrevet US5734423 - Signal hybrid device
