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Latest in component to rgb transcoders
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beun



Joined: 28 Jun 2006
Posts: 676
Posted: Thu Jul 22, 2010 1:58 pm    Post subject:
Chip,

If you mean the ISS2200 component to RGB converter with Gamma, yes that one is still available. I still have a few boards and components left to put one together.


Kim
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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tse



Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.

Posted: Fri Jul 23, 2010 12:36 am    Post subject:
beun wrote:
Actually and unfortunately it does. Increasing the gamma increases the gain and therefore the white level. I have tried to find a way around it, but making a really high frequency controllable attenuator is not trivial.


Kim


Cruise to

http://www.datasheetarchive.com/

and search for LM2202. Check out how the contrast and drive circuits work. Neat idea. An analog multiplier like AD835 would work, too. Not cheap, though.

Scott
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"Were we directed from Washington when to sow and when to reap, we would soon want bread."

Thomas Jefferson
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beun



Joined: 28 Jun 2006
Posts: 676
Posted: Fri Jul 23, 2010 2:00 am    Post subject:
Scott,

Yes I have seen the LM2202 and similar IC's. Heck, when I had the money to design my own and have it fabricated it would be really simple. But making a three channel wideband attenuator with discrete components is a b*tch.

As you mentioned analog multipliers work as well, but as you mentioned as well they are expensive and I am not so sure they track that well across three channels.
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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