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VCO (Read 2762 times)
designer
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VCO
Dec 03rd, 2004, 5:02am  
Could anyone tell me the expression which correlates the current into the 3-stage CMOS inverter chain and the frequency output?
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ccd
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Re: VCO
Reply #1 - Oct 9th, 2006, 12:34pm  
I think the answer to your question is at http://www.designers-guide.org/Forum/YaBB.pl?num=1130332597
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Re: VCO
Reply #2 - Oct 19th, 2006, 7:20pm  
td=c*Vsw/Iss ,T=2*N*td,f=1/T=1/2*N*td=Iss/2*N*c*Vsw
td is the delay time of one stage, c is load capacitance, Iss is current of one stage, Vsw is votage sweep,N is the number of the stages.
get it ?
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