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Comparison of delay cell base VCO and LC VCO

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master_picengineer

master_picengineer

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Hi all,

Please can anyone tel me what is the advantages and drawback of a Delay cell base VCO and an LC VCO. Comparaison in term of speed, area, noise, stability ...etc.
For an on chip application which one is prefered ?

Thanks in advance.
 

Regarding VCOs

LC vco provide the low noise advantages

but the low KVCO (freq/volt) limit the use

owing to inductors and capacitor will consume large area

think sufficient more you need
 
Regarding VCOs

Thanks friend,
I'm planning to design a VCO. What interrests me firts is the speed. Could you please tell me which VCO type is speeder ?
Thanks again.
 

Re: Regarding VCOs

master_picengineer said:
Hi all,

Please can anyone tel me what is the advantages and drawback of a Delay cell base VCO and an LC VCO. Comparaison in term of speed, area, noise, stability ...etc.
For an on chip application which one is prefered ?

Thanks in advance.
Click to expand...

LC VCO: better phase noise
Delay base VCO: less area and large tune range.
 

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