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    Design Folded Cascode with same input and output DC voltage

    Hello
    I Want to design a folded cascode amplifier with Vdd=1.2 and Vss=0 and input and output dc voltage=0.6. I use following circuit.This is my problem that i suppose input dc voltage =0.6 but gain is not >60.
    My technology file in TSMC 0.13um.Vth=0.45.
    please help me.
    best regards

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  2. #2
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    Re: Design Folded Cascode with same input and output DC volt

    Hi,
    Firstly, try using a simple current source for the tail. That's better. In this case M1 and M5 have more headroom too.
    What is your process and Vth?



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  3. #3
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    Re: Design Folded Cascode with same input and output DC volt

    How much is gain? Does common mode feedback work well?



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  4. #4
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    Design Folded Cascode with same input and output DC voltage

    can you post the result of operating point analysis for the ckt. ?
    that will help in knowing condn of various transistors..



  5. #5
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    Design Folded Cascode with same input and output DC voltage

    M4/M3 may in linear region



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