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hesan

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Bandwidth of oscillator without input
Nov 13^th, 2013, 7:23am

How to compute bandwidth of oscillator for LC-Cross Coupling oscillator ?
In My design Oscillator,I remove Varactor Mos for tuning Bandwidth and I want to calculate bandwidth of Oscillator.you now this oscillator dont have input and for this reason I dont Know How to measure Bandwidth.
If you have any idea for this work please explain How do it with ADS simulator? Cry

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aaron_do Senior Fellow Offline Posts: 1398	Re: Bandwidth of oscillator without input Reply #1 - Nov 21^st, 2013, 5:47pm Hi, what do you mean by the "bandwidth of your oscillator". If it doesn't have a tuning cap, then it only has one oscillation frequency. regards, Aaron
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hesan

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Re: Bandwidth of oscillator without input
Reply #2 - Nov 25^th, 2013, 3:01am

Oscillation frequency and bandwidth are different.

Oscillation frequency of my oscillator is clear to me, But I do not know that bandwidth ranges.

for example oscillation frequency of on oscillator is 2.4GHz and Bandwidth it is 400 MHz. range of bandwidth : [2GHz,2.8GHZ].

Note that the oscillator has no input, please help me in the measurement bandwidth. Cry

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aaron_do

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Re: Bandwidth of oscillator without input
Reply #3 - Nov 25^th, 2013, 4:32am

Quote:

for example oscillation frequency of on oscillator is 2.4GHz and Bandwidth it is 400 MHz. range of bandwidth : [2GHz,2.8GHZ].

I still don't get what you mean...I'm sure you are not talking about phase noise. Maybe you are talking about the bandwidth of your LC tank? i.e. just the L and (C + parasitics), but not including the -ve impedance...then its just f0/Q...

Aaron

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there is no energy in matter other than that received from the environment - Nikola Tesla

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hesan New Member Offline Think Outside Of The Box Posts: 3 Iran	Re: Bandwidth of oscillator without input Reply #4 - Nov 25^th, 2013, 7:07am thanks Aaron.
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