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AD8139 Not Working. I need help

I am using the AD8139 in the as shown in the attached PDF.

Spice simulations work fine. But On the bench using +-5V supplys,  AD8138 outputs Nothing.

What did I do wrong.

Stan Schekall a783239d66076ba983835f6e0157fe05.pdf

osc_5MHZ.pdf
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  • Hi Stan,

    Interesting question, the circuit as shown should work and your simulation says so too. It sounds like something basic, have you traced out your circuit, to see where the signal stops? Is the supply current correct? Is the feedback taken from the right output? What is your input signal amplitude? Just for clarification purposes, this circuit actually has a gain of two and not one. Let me know how it goes and what else I can do to help, you can send me a personal message if you want to take this offline and get more into the circuit details.

    Regards

    Jack

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  • Hi Stan,

    Interesting question, the circuit as shown should work and your simulation says so too. It sounds like something basic, have you traced out your circuit, to see where the signal stops? Is the supply current correct? Is the feedback taken from the right output? What is your input signal amplitude? Just for clarification purposes, this circuit actually has a gain of two and not one. Let me know how it goes and what else I can do to help, you can send me a personal message if you want to take this offline and get more into the circuit details.

    Regards

    Jack

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