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Recent content by lallaby

  1. L

    What is a diode connected MOS transistor

    diode with mos Hello guys, I can not find the pn junction between the Drain and Source of the MOSFET when the Gate and Drain are connected. Why people say it behaves like a diode? Is there anyone who can give me a cross section of the MOSFET to illustrate it? Thanks a lot! Best regards, lallaby
  2. L

    How to decrease the Miller Capacitor

    Thank you for your answer. Another question, increasing the current of the output stage will decrease its gain, right?
  3. L

    How to decrease the Miller Capacitor

    miller capacitor Hello Everyone, How to decrease the Miller Capacitor in a two-stage opamp which has a large gm at the input differential pair? I think the reason for large Cc is as follows: Since UGB is decided by gm/Cc, a very large Cc which is around 60 pF is used to move the UGB to a...
  4. L

    Impedance of a capacitor oscillated by a square wave

    Dear all, If I excited a capacitor with a square wave with frequency f, what is the impedance of the capacitor C? Since a square wave contains odd harmonics of its base frequency, when I only consider the second harmonic which has the frequency of 3f, what will the impedance of...
  5. L

    Input impedance of amplifier

    help help
  6. L

    Input impedance of amplifier

    Hello, I am confused about the input impedance of an opamp. For instance, I know the output noise and refer it back to a source impedance as Vonoise^2=4KTRB*A^2 In order to achieve the optimum noise performance, I have to make the input impedance of this opamp equal to the source impedance I...

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