Hi all,

I'm looking for a high frequency differential amplifier (> 400MHz BW
at -3dBm) optimized for high input impedance and very large slew rate
(1000 to 5000 V/us) running at 3V or 3.3V single supply.
I found some differential in-out amplifiers (AD8132, LMH6551) but all
are using small input/gain resistors to keep high the bandwidth, and
this is reducing the differential input impedance. Requirement for
differential input impedance is 10K at a differential gain of  5.
I don't want to use any buffers between the input signal and
differential amplifier.
I do not want to design my own differential in-differential out
amplifier using two or three high frequency OA.

If there is any RF master here with experience in high frequency 
differential amplifiers, I'm searching for a clue.

cheers,
Vasile

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