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How I can Simulate Fully diffrential Folded cascode OP AMP

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wael_wael

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HI
firstly, I would like to Thank all friends here which helped my to design my OP AMP , and this very nice and helpful fourm .
i advised a lot of my friends to be member of our fourm .
secondly, i finish my design but i cant simulate it could some one suggest what i have to do, for example, how i can find Phase margin ,Av, ..etc.
kind regds
 

Re: How I can Simulate Fully diffrential Folded cascode OP A

U can use AC response to simulate your OPA.
For example, u can input two signals which are DC signals with 1v AC magtitude, and the phase of one signal is 180, the other's is 0. After simulation, u can get what u want to get.
Good lucky
 

    wael_wael

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Re: How I can Simulate Fully diffrential Folded cascode OP A

thanx
 

Re: How I can Simulate Fully diffrential Folded cascode OP A

a proper technique is to connect the circuit in feedback with unity gain and apply input signal at one end and observe the ac response ....

**broken link removed**
regards
 

Re: How I can Simulate Fully diffrential Folded cascode OP A

U can use AC response to simulate your OPA.
For example, u can input two signals which are DC signals with 1v AC magtitude, and the phase of one signal is 180, the other's is 0. After simulation, u can get what u want to g


I often do it like this
 

My friends in first, i suggest you check operating your op amp like op amp, and for this a proper technique is to connect the circuit in feedback and run DC operating point analisis.
 

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