I'm having a problem using the AD8334. I'm using the board as is to make sure it works per the datasheet. Here is what my problem is:
I only measure the 2.5VDC bias; my input sine wave 25MHz signal that is 10mVpk-pk, comes from an Agilent signal generator. The output of the generator is 50ohm terminated. I don't have a differential drobe to measure the VO1, so I just used a single ended scope probe. Again, I measure the DC bias at each channel, but no AC signal. The input to the scope is set at high impedance.
Any suggestion on what I may be doing wrong with the board.
I will replicate your set up at the lab. I'll get back to you soon.
Can you provide a screen shot of the output you see on VO1? What is your gain? Can you try a higher input signal? Can you also share a picture of your setup to help you better? I think there might be wrong on your board setup or on your oscilloscope setup.
That was great. Yes of course I agree with you, we can use simple scope probe for observing this signal waveform. We just need extra care when using scope probe. A FET probe is usually recommended due to its low capacitance characteristic which minimize circuit-loading effects.
We go this working a few weeks ago.It turns out the problem was measuring the signal without a differential probe. this required using to singled ended probes, and doing the math ont the scope.
A suggestion might be to remind folks that this can be done without a diff probe. Thanks.