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Wide Band Current Source

Other Parts Discussed in Thread: LMH6629

Hi to all,

I want a circuit of Current source with 3-dB level BW of 400MHz and higher.

I tried to simulate (SPICE) a simple combination of actual single OpAmps and P-Ch MOSFETS, & R, C components

and could get maximum 235MHz of OpAmp LMH6629 & MOSFET at 100mA output level.

Can some one advise a transitor (or both components, or a new schematic) that can give desired BW?

Thanks. marco