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Recent content by reneezl

  1. R

    Who can share the IC compiler Lab(not Lab guide)?

    Could anyone share the IC compiler Lab(not Lab guide)?
  2. R

    What are the differences between doped MOS and nondoped MOS?

    Re: What are the differences between doped MOS and nondoped Thanks Erikl. I think the non-doped MOS might refer to the native MOS, with nearly zero threshold voltage, while the doped MOS refer to normal MOS.
  3. R

    What are the differences between doped MOS and nondoped MOS?

    Can anyone tell me What are the differences between doped MOS and nondoped MOS? Thank you very much!
  4. R

    A question about guard rings of PNP transistors

    Hi, I had a question about the PNP transistor array: Those pnp transistors are used in the bandgap reference circuit, and when the pnp array is laid out, should I add double guard rings to them? I mean, is this neccessary? Thanks.
  5. R

    A problem about guard ring,really confusing!!

    For an opamp that contains both pmos and nmos, how can I choose the body-species? Thanks
  6. R

    A problem about guard ring,really confusing!!

    Thank you for your reply! But the double guard ring is not for just nmos or pmos. Actually, I only used single guard ring for them(eg. ptap ring for nmos, ntap ring for pmos), while the double guard ring is for the whole module such as opamps. So, under the above situation, which sequence of...
  7. R

    A problem about guard ring,really confusing!!

    I know that guard ring is used for shielding. Ptap guard ring is used for NMOS and connected to VSS, while Ntap guard ring is used for PMOS and tied to VDD. But I do not know how to draw a double guard ring? 1,Should I put the Ptap guard ring inside, and Ntap guard outside, or vice versa...

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