🚀 go-pugleaf

>Can someone out there point me to an NTSC sync generator chip?  I am designing
>a WEFAX decoder that will output video with interlaced sync and i'm trying
>to keep the parts count down.  I checked my National and Motorola libraries
>with no luck.

If you mean a chip which will produce syncs and blanking at the NTSC rates,
just about any of the video timing ICs intended for computer displays (such
as the venerable 6845), with the proper clock and programming, will do it.
If you're asking how to combine the syncs with the video, try an NTSC
modulator chip such as the MC1377 from Motorola.  (Or if you're going to
be doing the conversion from digital video info to the analog version anyway,
just about any video DAC includes sync and blanking inputs.  Try Brooktree
or Analog Devices.)


Bob Myers  KC0EW   HP Graphics Tech. Div.|  Opinions expressed here are not
                   Ft. Collins, Colorado |  those of my employer or any other
myers@fc.hp.com                          |  sentient life-form on this planet.