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Recent content by iclayout1001

  1. I

    Which skill function to copy a shape pin in layout?

    I tried the dbCopyFig(), but only the geometry of the pin is copied, while the connectivity is lost.
  2. I

    Questions on Hercules netlist to spice conversion by nettran

    hercules nettran Is there an command option of nettran to add a prefix"X" to the instance name when translating a hercules netlist to spice? And how to remove the string"u" of the parameters? If without such options, I will have to write a script to modify the converted netlist. For example...
  3. I

    why dont connect B S in local area?

    Yes, I see this in the TSMC 90nm design manual. I'd to know why, too. Can anybody help? Thanks in advance.
  4. I

    Analog design practices and checklists

    Thanks Humungus and fixrouter4400, very good comments. Anything else?
  5. I

    Where to connect dummy to avoid floating?

    Re: Dummy connection yes, it's used for current mirror. Sometimes we're required to make them as optional transistors as well for topmost metal FIB. So it's not easy to connect all the 4 terminals to VDD/VSS all with the topmost metal. In this case, the easiest way are to connet only one...
  6. I

    Where to connect dummy to avoid floating?

    Re: Dummy connection Can we connect the dummy transistor gate to the gate of the function transitors, while connect the source and drain of the dummy transistor to GND for NMOS dummy and VDD for PMOS dummy? I think this will increase the capacitor of the function transistor gate terminal...
  7. I

    what does it mean "FG layer" ?

    Is this "Floating gate" poly manufactured in the same way as the other poly layer? Can this floating gate stand as high voltage as the control gate in flash? I found in some nvm processes, the gate poly for 5V transistors is this floating gate poly layer, while in some others it's same as the...
  8. I

    draw the guard ring or use it from the transistor directly?

    Re: draw the guard ring or use it from the transistor direct Yes, ROD is quite convenient for guardring.
  9. I

    What is the metal resistance found in the design kits?

    metal resistance Since the metal resistance is too small, in what situation will we use a metal resistor in the circuit design?
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