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Step Recovery Diode(SRD) in ADS schematic

Question asked by S_RAHMAN24 on Mar 5, 2007
Latest reply on Apr 3, 2007 by GAYE

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Hi,

I am gonna simulate a UWB transmitter in ADS 2005A scematic. I was looking for SRD diode library but couldnt find it. Can anyone please tell me how to use that? Or how can i get the componwent library for SRD?thanks.

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GAYE Mar 5, 2007 7:46 PM
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You can find an example here :

https://edasupportweb.soco.agilent.com/cgi-bin/show.pl?id=251048
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KELVCHAN_eesof Apr 3, 2007 4:09 AM
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Hi

I am also looking to design a pulse generator. I had some problems doing an IV simulation on the SRD from the given model. The message reads like this:

Circuit converged with at least one device's P-N junction current exceeding the explosion current and junction has been linearized. You may want to increase the explosion current in the device model or in the Options and resimulate. You may need to increase the MAXIMUM number of warnings under Output tab in Options to see which devices have been linearised.

May I know how to increase the diode's explosion current?

How do I check what has been linearised?
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GAYE Apr 3, 2007 10:26 PM
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You can increase the explosion current by increasing the parameter value Imax.

This warning is coming from the built-in diode (in the subcircuit). The explosion current value is the level beyond which the diode junction current is linearized instead of keeping an exponential behavior.
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Step Recovery Diode(SRD) in ADS schematic

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