Failure detection circuit.

摘要

A television deflection system failure detection circuit is described in which a first latch (8) is set during a first portion of the frame period and is reset by a fly-back signal the output of the latch being gated by a gating circuit (17, 19-21) to set a reset or output latch (18) during a second portion of the frame period which does not overlap the first portion, and in dependence upon the state of the first latch (8).