Anthony, there are a `wealth' of high-speed Op Amps out there with
full-power BWs of several hundred MHz. Check Analog Devices, Maxim, TI, and
others. I have a few here for my on-going logic analyzer/DSO project. As far
as current feedback Op Amps, they are easy to design with. A great reference
is Analog Devices "High Speed Design Techniques" book (ISBN-0-916550-17-6).
They were giving them away. Check their web site. Also check their Analog
Dialogue magazine. In volume 30, #3 "Ask the Application Engineer" they
discuss current feedback Op Amps. There are related articles in v29, #2.
Another reference is TI's Application Report (Nov 98, SLVA051)
"Voltage Feedback Vs Current Feedback Op Amps".

   Also look at back issues of Linear Technology magazine and Maxim's
Engineering Journal. Volume 34 has an article on ADC buffers.

      http://www.analog.com/
      http://www.ti.com/
      http://www.maxim-ic.com/
      http://www.linear-tech.com/

   - Tom

At 07:30 PM 2/3/00 -0600, Anthony Clay wrote:
>Hello,
>
>Anthony here again,  I was just wondering if anyone out there knows about
>the most current op-amps.  I look in the catalogs and see op-amps that claim
>to have "Megahertz of BW".  I am almost positive that this DOES NOT mean
>that it can even buffer, say a 10.7MHz signal, much less amplify or filter
>one.
>
>Are there any that are capable of operating at 455kHz yet?  How well? Where
>can I find info about how to interpret such specifications, (especially on
>the net).  Should I find any I will gladly post an article about it on my
>website.  I know this is a little OT, but I feel that Op-Amps play a very
>important role when it comes to embedded processors such as the PIC, almost
>as important as the 78L05 regulator and the 2K pull-up!
>
>Anthony


------------------------------------------------------------------------
Tom Handley
New Age Communications
Since '75 before "New Age" and no one around here is waiting for UFOs ;-)