Transistor in same ratio (100/2 & 50/1), what is the different?

Discussion in 'Cadence' started by smartchi, Feb 3, 2004.

  1. smartchi

    smartchi Guest

    Dear all,

    I am sorry to ask this question again. Actually, I have seen it before
    in this newsgroup. However, I could not find out it in this newsgroup.
    Could anyone answer this question again?

    As I remember that the 100/2 transistor with larger parasitic capacitor
    than the 50/1 transistor. How about any other different?

    Best Regards,

    Charles CHENG
     
    smartchi, Feb 3, 2004
    #1
  2. smartchi

    Nianwei XING Guest

    It will also affect the noise the transistor contributed to the circuit.
     
    Nianwei XING, Feb 3, 2004
    #2
  3. smartchi

    Xiaofeng Wang Guest

    Hi, Charles:

    1. smaller gds
    2. better matching eg. in current mirror
    3. many other differences if u consider second order effects. u can
    find the details in many analog ic design book.


    Xiaofeng
     
    Xiaofeng Wang, Feb 4, 2004
    #3
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