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.
猜您喜欢
京公网安备 11010802033920号
Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved
评论