extracting H/V sync from sync-on-green video signal?

[Jochen Kunz]

On Mon, 31 Jan 2005 12:51:15 +0000
Jules Richardson <julesrichardsonuk at 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.
-- 


tschüß,
       Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/