31 Jan
2005
31 Jan
'05
2:32 a.m.
On Mon, 31 Jan 2005 12:51:15 +0000
Jules Richardson <julesrichardsonuk(a)yahoo.co.uk> wrote:
Unfortunately I don't have an LM1881 chip in the
spares pile :-(
I could have sworn there was an easier way though
You can use an OPA wired as a
comparator too. Set the switch level to
about 0.15 V and you get C-sync out of the comparator. The black level
of a video signal is 0.3 V. Everything below down to 0 V is sync. You
should use a TTl IC behind the comparator as a line driver.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/