LMH6551: Feedback resistance

Hello Yuto,

While there is no limit, note that increasing the feedback resistances will have an effect on the bandwidth and noise performance of your circuit. I would recommend simulating to ensure it still meets your requirements.

Best,

Hasan Babiker

Well at that higher gain of 10V/V will probably be ok for feedback pole due to input C effect, keep in mind 

It will be relatively low BW - the TINA model shows 203MHz GBP so your NG=11 case here will be about 19MHz closed loop F-3dB, 

Here is that Aol test setup , and that file below so you can get the LMH6551 model (the one I have is 2007, not sure if there is an update)

LMH6551 Aol curve generation.TSC

And incidentally, I notice the Aol model does not seem to show a higher pole (phase just sits at 90deg, should pull down at some higher F)  which is almost certainly there physically, makes low gain sims a bit suspect