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Recent content by canarybird33

  1. C

    How to calculate Delay/log(Delta-Vin) for a comparator?

    Delay/log(Vin) for a comparator? How to calculate Delay/log(Delta-Vin) for a comparator? There is an example in attachement . how they determine delta-Vin? Why is the unit ps/dec?
  2. C

    [SOLVED] Kick-back noise of a latch comparator

    dick_freebird, thank you. I applied a proper common mode voltage, so the comparator can compare right now. I re-simulated the proposed circuit in paper "Analysis and Design of a Low-Voltage Low-Power Double-Tail Comparator". kick back noise has been reported 43 mv while in my simulation is more...
  3. C

    [SOLVED] Kick-back noise of a latch comparator

    Hello all, In my searches,the below method is used to calculate kickback noise.(Rth=8kohm; according to the this paper "Kickback Noise Reduction Techniques for CMOS Latched Comparators"] My simulation doesn't show sensible results. I mean, when I apply this method, the comparator does not...
  4. C

    How to size transistors in a latch comparator?

    Hello Is there any technique to design transistors widths in a comparator? how can I determine the transistors sizes for the comparator that I attached? I would be very thankful if you could suggest tutorials or book. Thanks in advance
  5. C

    determine minimum clock for a latched comparator

    Latched-only Comparator specifications Hello I want to measure specification of a latched-only comparator. How can I determine Clock frequency of that? How can I measure offset ? Is it correct to measure Gain and Unity gain freq. ?(cause we have positive feedback!) thanks in advanced
  6. C

    determine minimum clock for a latched comparator

    Hello all How I can determine minimum clock for a latched comparator? I saw this formula to calculate it , but I want to determine it by Hspice .
  7. C

    offset simulation with Hspice for a simple comparator

    :!: How can I plot Vin v.s. Vout ?
  8. C

    offset simulation with Hspice for a simple comparator

    let's make it easier I have a comparator , but it doesn't compare. I mean by changing input (vn>vp to vn<vp), output should change, but it doesn't. what's the problem? :bang: I tested it with Proteus. it was okay, but in Hspice it doesn't work. Please Help me :sad:
  9. C

    offset simulation with Hspice for a simple comparator

    Hello all After many hours searching and reading the tutorials for offset calculation, I don't know what should I do. here is my codes. please help me to complete it.I don't understand how to write codes for DCMATCH or monte carlo simulation and how to extract the information. what do these...
  10. C

    Distortion usually increases with frequency??

    why harmonics and inter-modulation are important(or appear) at high freq. but not at medium or low freq. ??? don't we have them at medium or low freq. ???
  11. C

    Distortion usually increases with frequency??

    I afraid I couldn't understand yet!! you mean at high frequency, devices have to work on more speed and if they don't have enough slew rate it causes distortion.yes? But is it the only reason for every devices? what else do you think? what about inter-modulations? what about the importance of...
  12. C

    Distortion usually increases with frequency??

    Hello Why is said that "Distortion usually increases with frequency" ? and what is the importance of SNR over SNDR? I mean that why they use these to concept ? thanks:grin:
  13. C

    I need 32 channel adc

    HI I am using atmega8 and I have finished the program. I have used 8 adc channel. Now I would like to change mega8 with a micro-controller with 32 channel adc (I'm using codevision).
  14. C

    How to measure IIP3 in ADS

    Hello I am working on this circuit as a homework. I don't know how to see the IIP3 curve in ADS. I have 2 question while working with "IIp3 symbol": 1:How should I define "harmonic frequency indices for the fundamental frequency" for my circuit? 2:How should I define "harmonic frequency indices...
  15. C

    what is the number of fingers in MOS transistor

    How I can get these guides? Should I search for theses foundry's design guides? Do you have any tutorial about it?
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