Quote:
Originally Posted by Skywave
Thank you, Mr. B. That is worthy of serious consideration. Perhaps the design would tolerate a NPN/PNP pair with higher fT to give an increased B/W.
Al.
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Possibly. I've actually been looking at some of the new opamps you can get which may be usable for this as well. Linear's LTC6268 has 4GHz gain-bandwidth product, 0.45pF Cin and 20fA (yes femto-amp) bias current for just over £6. Only bad side is stability and +/200mV input before it'll blow up.