How can I build a circuit which converts composite sync signal to HSYNC and VSYNC ?
Sync separation is a process quite often needed in video technology, but it is a little bit hard to find a chip which especially made for that. What you can find easily is a chip which takes a full composite video signal and outputs separate sync signals. Those chips can be directly used also with composite sync signal because it is just like a composite video signal without picture and has a little bith higher signal level. You can find a good list of such chips and links to their datasheets (which include example circuits) at http://www.epanorma.net/videochips.html. I have used the following circuit (based on example from datasheet) for separating composite sync signal for monitors which need different kind of sync than what your source gives. The circuit is based on very popular LM1881 sync separation IC. Sync separator circuit Features of the circuit: • Circuit accepts composite sync signal at any level between 0.3Vpp and 5Vpp • Circuit can accept sync from sync on green source if
Sync separation is a process quite often needed in video technology, but it is a little bit hard to find a chip which especially made for that. What you can find easily is a chip which takes a full composite video signal and outputs separate sync signals. Those chips can be directly used also with composite sync signal because it is just like a composite video signal without picture and has a little bith higher signal level. You can find a good list of such chips and links to their datasheets (which include example circuits) at http://www.epanorma.net/videochips.html. I have used the following circuit (based on example from datasheet) for separating composite sync signal for monitors which need different kind of sync than what your source gives. The circuit is based on very popular LM1881 sync separation IC. Features of the circuit: • Circuit accepts composite sync signal at any level between 0.3Vpp and 5Vpp • Circuit can accept sync from sync on green source if connected to green pict
