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transfer function

 
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Taskuraha



Joined: 04 Jan 2003
Posts: 24
Post25 Sep 2008 16:13   transfer function
If somebody could help and tell me ( look the picture of the circuit and simulated ac-response ) where does that pole to transfer function comes from.

Rf1 = Rf2 and Cd1 = Cd2. Differential amplifier is cherry-hooper configuration Ad = 34 dB and BW = 680 Mhz

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rfsystem



Joined: 25 Feb 2002
Posts: 797
Helped: 85
Post25 Sep 2008 21:38   Re: transfer function
Questionmark Pole is by Rf2*Cd2

Depending on amplifiers common mode rejection the gain change.
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Taskuraha



Joined: 04 Jan 2003
Posts: 24
Post26 Sep 2008 8:54   Re: transfer function
But what makes then that zero ( i thought that zero comes from Rf2 and Cd2 )?
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