gianbo85
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Hi Everybody,
I am Gianluca, an EE Master's student from Italy.
This is going to be my first post in this forum but I have read you for quite a while now.
I am designing an ultrafast pulser to trigger a photodetector. The last stage of this pulser is an MMIC PA from Hittite.
I developed a Bias Tee to power it up with a 400ma @ 12V bias.
The bias tee is quite a common one with a DC blocking capacitor and two inductors in series.
My problem is that if a failure of the 12V line occurs, the inductors in the bias tee will just boost their voltage, damaging my precious MMIC.
How can I protect the IC RF out? I didn't want to use a zener diode because it will introduce a capacitance on the RF pin that needs to have a rise time of less than 200ps!
Any ideas?
Happy Christmas to everyone and thanks in advance for any help
Gianluca
I am Gianluca, an EE Master's student from Italy.
This is going to be my first post in this forum but I have read you for quite a while now.
I am designing an ultrafast pulser to trigger a photodetector. The last stage of this pulser is an MMIC PA from Hittite.
I developed a Bias Tee to power it up with a 400ma @ 12V bias.
The bias tee is quite a common one with a DC blocking capacitor and two inductors in series.
My problem is that if a failure of the 12V line occurs, the inductors in the bias tee will just boost their voltage, damaging my precious MMIC.
How can I protect the IC RF out? I didn't want to use a zener diode because it will introduce a capacitance on the RF pin that needs to have a rise time of less than 200ps!
Any ideas?
Happy Christmas to everyone and thanks in advance for any help
Gianluca