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Problem with AD818 oscillating

Category: Hardware


I am facing AD818 oscillation problem.

Just by turning on the power to the circuit,
I can see an oscillation waveform of about 20MHz output from the AD818.

I would like to know the cause of oscillation and how to suppress it.

The circuit configuration is shown below.

There is no problem if the cutoff frequency is set to 20MHz or less.
However, the situation is such that it is not allowed to attenuate the 20MHz signal.

That makes the problem difficult.

I’d like to ask you for your help on this problem.

Best regards, Ryo