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| ericball:
Don't forget that you need over 6 MHz of bandwidth for video. Some op-amps have internal low-pass filters to limit destructive oscillation in typical feedback circuits. |
| dabone:
I built the one on the pc2jamma page and it worked well, but not worth the trouble because of the price difference between it's parts and labor needed to assemble vs the ultimarc amp. Later, dabone |
| fredster:
How about something old? Like a TL082c on those old Atari boards. They cost about $1. |
| DarkKobold:
--- Quote from: hiperco on January 03, 2005, 06:56:13 pm --- I've built a few op amp circuits in my day (they are pretty much hard to avoid when getting an advanced degree in Electrical Engineering --- End quote --- |
| hiperco:
--- Quote from: DarkKobold on January 04, 2005, 02:12:01 am --- --- Quote from: hiperco on January 03, 2005, 06:56:13 pm --- I've built a few op amp circuits in my day (they are pretty much hard to avoid when getting an advanced degree in Electrical Engineering ;D ) --- End quote --- DOH! ;) You coulda said this before my EE banter, so I wouldn't have come off like an I'm an EE and you are not! >:( :D You have to admit that Op amps were one of the more difficult areas of EE. How far did you go? I'm in my masters now, but in signal processing. --- End quote --- MSEE :) (No offense taken, by the way, your words of caution are always appropriate. The "textbook" use of op-amps is easy, its the "real life" part that will get you every time (stability, noise, etc) ;D ) |
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