chip that generates ntsc black?

[4MLA1FN]

is there such a thing? i've seen microcontrollers used to generate
ntsc, but it seems the must be a simpler method. something like the
elm electronics 304 chip. (it doesn't produce black though, which i
need.) thanks for any pointers.

 

[mpm]

is there such a thing? i've seen microcontrollers used to generate
ntsc, but it seems the must be a simpler method. something like the
elm electronics 304 chip. (it doesn't produce black though, which i
need.)  thanks for any pointers.

Lots of cobwebs here, but try Hitachi.
We used one of their video camera chips which I'm 98% certain had that
capability.
Sorry, I do not recall the part#, and it was also many years ago...
-mpm

 

[4MLA1FN]

Lots of cobwebs here, but try Hitachi.
Sorry, I do not recall the part#, and it was also many years ago...

no problem. i appreciate the lead. off to google...

 

[Rich Grise]

no problem. i appreciate the lead. off to google...

http://www.google.com/search?q="sync+generator"++IC

yields this:
http://instruct1.cit.cornell.edu/courses/ee476/ideas/saa1101.pdf

Then, just don't add any video. The sync output is based on black -
the pulses are "blacker than black". IOW, between sync pulses, it
idles at black.

Good Luck!
Rich