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Design >> RF Design >> How to calculate the Q of a loaded Tank?
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Message started by jobless on Sep 5^th, 2006, 12:45pm

Title: How to calculate the Q of a loaded Tank?
Post by jobless on Sep 5^th, 2006, 12:45pm

How to calculate the Q of the loaded Tank in a conventional differential LC VCO?

Title: Re: How to calculate the Q of a loaded Tank?
Post by ACWWong on Sep 5^th, 2006, 1:45pm

jobless wrote on Sep 5^th, 2006, 12:45pm:

How to calculate the Q of the loaded Tank in a conventional differential LC VCO?

By adding in all the loads (devices and layout tracking) and including all the parasitic components (be R L or C)....

If you are wanting to do hand calculations, it'll be tough to get good accuarcy unless you have one dominant lossy component such as poor quality on chip inductor in conjunction with high Q other components (ie MIM caps, good varactors, FET capacitance cgs, cds etc..). If you want to know how to do LCR hand calculations, look it up in a book... i like Chris Bowick's RF Design as good intro into LCR calculations.