Re: TVS suppression on deflection transistors...

From: Anders Knudsen <Anders_Knudsen_at_btc.adaptec.com>
Date: Tue Jan 20 1998 - 18:54:12 EST

At 03:22 PM 1/20/98 -0800, you wrote:
>Our San Jose office seems to have pulled their heads out finally so maybe
>my e-mail is working again... :-)
>
>Anyway. I took some quick measurements on the deflection transistors of my
>Empire Strikes Back game with the game running in attract mode. Looks like
>there's about 24-29V across them depending on what's going on at any given
>point of the display. (The ESB board was adjusted to generate an image
>that pretty much filled the CRT. Probably a bit larger than
>"recommended".)
>
>Given that info, I'd say maybe I should try some 33V TVS' and see there's
>any side-effects. They have a minimum trigger of around 31.4V and a max
>around 34.7. The 30V guys would probably clamp too low (around 28.5V) for
>"normal" operation of the monitor.
>
>Guess I need to come up with some other stuff to buy from DigiKey... ;-)
>
>-Clay

Hey Al, were you going to get a couple of these and try getting some
before/after scope traces to see how they performed?
-Anders.
 -----------------------------------------
| Anders Knudsen
| ASIC Design Engineer
| Adaptec, Inc., Boulder Technology Center
| anders_knudsen@btc.adaptec.com
| http://www.adaptec.com
 =========================================
Received on Tue Jan 20 15:56:21 1998

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