Audio/Video Switch parts

I have been asked to design a series of Audio/Video switches by a company I
used to design for. They want to see 8 to 1 as well as 1 to 8 for both audio
and video. The last serious design I did was ten years ago, so I am assuming
that the the old Hitachi 506 and CD405* series Mux's have been improved upon
and replaced with something better?

As I started digging around looking for the best parts, I realized that maybe
some here would have an opinion as to what devices might be considered a good
fit for what I have been asked to do.

Probably too general a request, but I need to start somewhere and I am out of
the loop at the moment with vendors and sales people.

Any suggestions would be most appreciated.

Thanks,

John

 

[John Woodgate]

I read in sci.electronics.design that uvcceet@juno.com wrote (in
<41583208$1$woehfu$mr2ice@giganews.aros.net&gt about 'Audio/Video Switch
parts', on Mon, 27 Sep 2004:

I have been asked to design a series of Audio/Video switches by a
company I used to design for. They want to see 8 to 1 as well as 1 to 8
for both audio and video.

Line-level audio? Standard level video?
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

In <3TDoCrIA7DWBFwZT@jmwa.demon.co.uk>, on 09/27/04 at 05:24 PM,
John Woodgate <jmw@jmwa.demon.contraspam.yuk> said:

I read in sci.electronics.design that uvcceet@juno.com wrote (in
41583208$1$woehfu$mr2ice@giganews.aros.net&gt about 'Audio/Video Switch
parts', on Mon, 27 Sep 2004:
I have been asked to design a series of Audio/Video switches by a
company I used to design for. They want to see 8 to 1 as well as 1 to 8
for both audio and video.

Line-level audio? Standard level video?

Yes, assuming I understand the phrases correctly. The boxes will be used in
CATV Commercial Insertion and related gear.

John

 

[john jardine]

<uvcceet@juno.com> wrote in message
news:41583208$1$woehfu$mr2ice@giganews.aros.net...

I have been asked to design a series of Audio/Video switches by a company
I
used to design for. They want to see 8 to 1 as well as 1 to 8 for both
audio
and video. The last serious design I did was ten years ago, so I am
assuming
that the the old Hitachi 506 and CD405* series Mux's have been improved
upon
and replaced with something better?

As I started digging around looking for the best parts, I realized that
maybe
some here would have an opinion as to what devices might be considered a
good
fit for what I have been asked to do.

Probably too general a request, but I need to start somewhere and I am out
of
the loop at the moment with vendors and sales people.

Any suggestions would be most appreciated.

Thanks,

John

Maybe use something like TSH941 quad video opamps. These amps can be
digitally enabled/disabled in 200nS, allowing for video/audio bussing or
matrixing, yet retain the normal opamp benefits of buffering, signal
isolation, gain setting etc.
regrds
john