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  1. Closed: Re: Fully-Differential folded cascode amplifier with enhanced gain

    Thank you Suta,

    I would like to confirm your aswer because also I have read now similar thing in Jakob book,

    My next question please,

    The common mode feedback amplifier for both AUX-P and ...
  2. Closed: Re: Class AB fully differential amplifier design issue

    Dear FvM, The CMFB ampliifer is not shown in this circuit, but I am using to control the Vbiasn (shown in the circuit) in such a away that if the output common mode voltage is increasing then the...
  3. Closed: Class AB fully differential amplifier design issue

    Dear friends,

    I am desinging a class AB fully differential amplifier like the one shown in the image below,

    If I don't use the transistors M7/M12 then I will get very high current in the...
  4. Closed: Re: Fully-Differential folded cascode amplifier with enhanced gain

    Dear Suta,

    Thank you for your reply

    I understnd from your explanation and graph that I need to set VCM_N for AUX-N to the same gate level of M5, which is the biasing voltage of the NMOS...
  5. Closed: Re: Fully-Differential folded cascode amplifier with enhanced gain

    Thank you Suta for your reply,

    Yes for sure I have to connect the CMFB of each auxilary ampliifer to a reference voltage, I will call it VCM_N for AUX-N and VCM_P for AUX-P, and this is the...
  6. Closed: Re: Fully-Differential folded cascode amplifier with enhanced gain

    Dear Suta,

    T'hank you for your reply and nice to see you again,

    I appreciate your help but indeed I didn't get your point, can you please explain it again in different way
  7. Closed: Re: Fully-Differential folded cascode amplifier with enhanced gain

    Dear frank,

    I confirmed from your answer that we can not use the output VCM as a reference voltage for the boosting auxilary ampliifer, and I believe that your relationship is mostly correct, only...
  8. Closed: Rail to rail input folded operational amplifier

    Dear friends,

    in the circuit shown below, the output cascode stage of the folded cascode amplifier has two miror, one up and one down, and there is no current source, how the current is then being...
  9. Closed: Fully-Differential folded cascode amplifier with enhanced gain

    Hello,

    I am interesting on enhancing the gain of the fully differential folded cascode amplifier as shown in the figure below,

    For the auxilary boost amplifier (AUX-N and AUX-B) I would like to...
  10. Replies
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    121

    Closed: Feasibility Analyses in Cadence

    Hello,

    What is the purpose of the Feasibility Analyses in Cadence ADE GXL ? I read the help about it but I didn't get the difference between it and the Global or local optimizations, it even use...
  11. Closed: Source follower design issue for cascoded two stage op-amp

    Dear friends,

    I am designing the circuit shown in the figure below, In my first design I didn't use the source floower transistors MT1 and MT2, thus I gout a high current at the output stage...
  12. Closed: Re: Running different type of simulation in one environment

    Dear friends,

    I saw this slide from Cadence running multiple test in the same time

    156291
  13. Closed: Re: Running different type of simulation in one environment

    Dear Pancho

    Thank you for your reply,

    There is an option in ADE GXL that is add test, does it mean that for every simulation setup I can his own ADE test ?, in this case suppose in my schematic...
  14. Closed: Running different type of simulation in one environment

    Hello

    I would like to ask you how can I run a different type of simulation in one simulation environment, for example suppose I want to do the basic simulation of op-amp like

    -input common mode...
  15. [SOLVED]Closed: Re: Making a mathematical expression between two parameters in ADE GXL output setup w

    Thank you Pancho for your rich information and I am sorry not to rate your help as my rating is finished today

    - - - Updated - - -



    Thank you deep

    yes it is the same condition that lead...
  16. [SOLVED]Closed: Re: Making a mathematical expression between two parameters in ADE GXL output setup w

    Dear Pancho,

    Thank you very much for your reply

    I have just saw a former post from you criticising the performance of cadencde optimizer,

    I will not rely on the optimizer for finding a...
  17. [SOLVED]Closed: Making a mathematical expression between two parameters in ADE GXL output setup windo

    Hello,

    I am running the Circuit optimization from ADE GXL, I am practising simple two-stage operational amplifier as it has shown below,

    I want to include a formula in my output setup the M6...
  18. Closed: Re: Difference between input and output offset voltage

    Dear asd

    Thank you alot for your help,

    Still it is not clear for me how to simulate the input and output offset voltage seperately ?

    Thank you
  19. Closed: Re: Is it possible to compensate the VOS by adjusting the common mode outout voltage

    Dear Friends,

    Thank you for your help, and sorry if my helping rate is over for this day but I do appreciate all the replies

    I am sure after your kind explanation that adjusting the offset...
  20. Closed: Re: Is it possible to compensate the VOS by adjusting the common mode outout voltage

    Dear FvM,

    You are right, sorry for this mistake of not showing the VCM in my circuit,
    The VCM was hold at one of the CMFB amplifier input to compare it with the VOC, as shown in the figure...
  21. Closed: Re: Is it possible to compensate the VOS by adjusting the common mode outout voltage

    Dear FvM,

    I mean by the VCM is the reference voltage (VREF), if you see the data sheet please of the two instrumentation amplifier I posted, Ideally it should be in the middle of the supply...
  22. Closed: Re: Is it possible to compensate the VOS by adjusting the common mode outout voltage

    Dear Friends,

    Thank you all for your helpful contribution,

    And nice to see you again Klaus :)

    Below is the bloack diagram and the schematic of my instrumentation amplifier, it is based on...
  23. Closed: Re: Difference between input and output offset voltage

    Dear friends,

    Thank you for your help

    How would you know I mean about Instrumentation amplifier ? :) does it mean that op-amp only characterized by input offset voltage ?
  24. Closed: Re: Is it possible to compensate the VOS by adjusting the common mode outout voltage

    Thank you asd for your reply

    Yes right I am dealing with an Instrumentation amplifier but I think it is also applied to the op-amp.

    Any way as you said the fianl target or what matter is what...
  25. Closed: Difference between input and output offset voltage

    Dear friends,


    What is the difference between the input and output offset voltage in operational amplifier, how to simulate both of them ?

    Thank you
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