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Process and temperature tolerant ring VCO

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lipkai

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Hi guys,

I find out that the process and temperature variations is can really limit the tuning range of a ring VCO.
I'm just wondering is there any ring VCO design that is process and temperature tolerant?

Thanks.
 

I think if you design a current starved VCO with temperature controlled current sources, you may be able to achieve temperature compensated VCO. I have not done it though and so not sure.
 

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    lipkai

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try to refer John G. Maneatis paper in IEEE
self-biased technique of delay-locked loop and phase-locked loop. inside the paper, he introduce a good vco which can overcome PVT
 

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