CHARACTER OR TITLE SIGNAL MIXING CIRCUIT OF VIDEO APPLIANCE

摘要

a sync separator(200) for separating the horizontal and vertical sync signals and composite sync signal from the luminance signal; a character/title controller(300) for receiving the horizontal and vertical sync signals to generate preset character and title signals; a mixer for mixing the character signal and title luminance signal with the composite sync signal; clampers(600,620,640) for claming the input luminance signal and signal from the mixer to a sync tip level; and a switch for selecting and mixing the signal generated by the mixer with the luminance signal.