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What's the difference in value between GBW and UGF?

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taofeng

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are they the same in value ?

can anyone make it clear for me ?

thanks a lot
 

GBW and UGF

yes , GBW=gain*bw=constant
at UGF gbw=gain*bw=1*UGF=UGF
 

Re: GBW and UGF

They will be equal only for a single-pole system ( or for a higher-order system that can be approximated by a single pole system, such as OTA's with enough Phase Margins ). This can easily be proved
 

Re: GBW and UGF

Only equal if the second pole is far away enough from the first pole (dominant pole) where in this case you can approximate the systems as a single pole transfer function response
 

Re: GBW and UGF

always when you have one dominat pole
 

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