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Subject: Re: Is this chip suitable for video signal switching?
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Sat, 18 Jan 2003 03:02:45 GMT
NNTP-Posting-Date: Sat, 18 Jan 2003 14:02:45 EST
Organization: BigPond Internet Services (http://www.bigpond.net.au)
"BarryNL" wrote in message
> I pulled an MC14066B chip out of an old video although I'm not sure what its
> function was in there. However, I'd like to use to to switch a video signal
> (ie. the composite signal in a SCART cable) and was wondering if anyone knew
> if it was suitable for this (basically, I want to use it to multiplex
> between the normal signal and black/white (0.3/1.0V) signals, so I can
> overlay text onto a picture using a PIC). The data sheet just says its a
> Quad Analog Switch/Multiplexer but I don't know if it's suitable for signals
> as fast as video signals. I've put a copy of the data sheet on the web at
> http://www.xs4all.nl/~barryxs/MC14066B.pdf if anyone wants to see it.
> Thanks, Barry.
Mix them, don't Mux them.
You'll also have to genlock/syncronize the overlay with the incomming video.
Perhaps somethng like the STV5730A On Screen Display chip would make
life easier? (or similar device)
Greg the Grog
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