Line scanning circuit for a TV receiver has an electronic switch element with its control electrode fed with a line-frequency disable pulse derived from a scanning line synchronizing pulse

摘要

Comparing phases (2) for a line-frequency pulse (Z) derived from a received signal and for a reference side of an impulse derived from a line-scanning current (ia) produces a correcting variable (Us) that controls the phase of a disable pulse (H) so as to guarantee a constant time cohesion between a video signal and the line-scanning current.