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varactor simulasion on ADS

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hi
someone know how i can simulate Varactor on @DS
i can't (or don't know) how to make elements like capacitor to be
depends on voltage

please Help

thanks

Hi,

Look at Alpha Industries ( now Skyworks , hxxp://www.alphaind.com/, x=t) search under appnotes for the VCO applications, they have examples for varactor simulation.

Regards, Al

Maybe this can help you..
look in the ADS documentation for the SDD component. There is as example for a varactor.. moreover try to look also for an example named MOS_VCO
Success...

Leron

thank you very mach :o :o :o

i will play with the @DS , and i will update

You may regard a common MOSFET as a varactor, connect the MOSFET drain, source and bulk together(for example, as B), then this two ports(the gate and B) device is a varactor. Simulate it with S-parameter, you can get its C-V and Q-V characteristics.

ADS example "MOS_VCO_prj" has a design "biased_FET_cap_test.dsn", showed the simulation method.

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