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Making rf amp, 1-50MHz, 40-60dB.

Junghyun Shin
Prodigy 10 points

Hi,

I have to amplify a signal from order of  nW to order of mW.

I tried to make rf by followeing TI's example with THS3202. (file name: RF and IF amplifiers with op amps)

I made the 40dB amp on prototype PCB by soldering and attatch THS3202 by silver paste.

But it has a parasitic oscillation.

Q1) What problem can be there?

 

So, I modified the circuit and made the 20dB amp. I think it is working.

Q2) If I make a few amp and connect them, I can make amlitude of signal from order of nW to order of mW?

 

Please quick answer.