资 源 简 介
The EL4583A extracts TIming from video sync in NTSC, PAL,and SECAM systems, and non-standard formats, or fromcomputer graphics operaTIng at higher scan rates. TImingadjustment is via an external resistor. Input without validverTIcal interval (no serration pulses) produces a defaultvertical output.Outputs are: composite sync, vertical sync, filter, burst/backporch, horizontal, no signal detect, level, and odd/evenoutput (in interlaced scan formats only).The EL4583A sync slice level is set to the mid-point betweensync tip and the blanking level. This 50% point is determinedby two internal sample and hold circuits that track sync tipand back porch levels. It provides hum and noise rejectionand compensates for input levels of 0.5V to 2.0VP-P.
