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Simplified analytical expression of MOS varactors

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MOS varactors

Hi,

does anybody have simplified analytical expression of MOS varactors ?
I've read many articles about them and the only article I found was one of Thomas Lee's group about accumulation mode, where some analytical expressions were given but no derivation of them what makes it difficult to read.

CTT
 

Re: MOS varactors

Try these papers from IEEE and others, I don't have them however here.

1.) P. Andreani and S. Mattisson, “On the Use of MOS Varactors in RF VCO’s,” IEEE J. of Solid-State Circuits, vol. 35, no. 6, June 2000, pp. 905-910.

2.) A-S Porret, T. Melly, C. Enz, and E. Vittoz, “Design of High-Q Varactors for Low-Power Wireless Applications Using a Standard CMOS Process,” IEEE J. of Solid-State Circuits, vol. 35, no. 3, March 2000, pp. 337-345.

3.) E. Pedersen, “RF CMOS Varactors for 2GHz Applications,” Analog Integrated Circuits and Signal Processing, vol. 26, pp. 27-36, Jan. 2001
 

Re: MOS varactors

Try fabricate one and measure the s parameters, or
using some fitting method after reading your technology data sheet,in general your design kit will include some varactor design
 

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