help me with orcad-pspice

Discussion in 'General Electronics Chat' started by charm_quark, Oct 26, 2005.

  1. charm_quark

    Thread Starter New Member

    Oct 26, 2005
    1
    0
    Hello, I'm new with Pspice (only 3 days) and I've to make a differential amplifier with CMOS (N and P) to run. I've made it but when I run it, it shows me the message
    "M_Q6 N01848 N02912 N01565 CMOSP
    + L=10u
    ----$
    ERROR -- unknown parameter
    + W=12u"
    twice. I have to finish the project in 5 hours! and I don't know what to do.
    Could anyone help me please!!!!!!????
    This is all the message I get in case you need it.
    "
    ** Creating circuit file "diaforikos enisxutis-SCHEMATIC1-DIAFORIKOS2.sim.cir"
    ** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

    *Libraries:
    * Local Libraries :
    * From [PSPICE NETLIST] section of C:\Program Files\Orcad\PSpice\PSpice.ini file:
    .lib "D:\METAPTYXIAKO\A' EXAMINO\ANALOG MICRO & VATHM\DIAFORIKOS ENISXUTHS\CMOS.lib"
    .lib "nom.lib"

    *Analysis directives:
    .DC V_VDD LIST 5V
    .PROBE V(*) I(*) W(*) D(*) NOISE(*)
    .INC ".\diaforikos enisxutis-SCHEMATIC1.net"



    **** INCLUDING "diaforikos enisxutis-SCHEMATIC1.net" ****
    * source DIAFORIKOS ENISXUTIS
    V_V3 N02344 GND DC 0Vdc AC 1Vac
    V_V4 N02422 GND DC 0Vdc AC -1Vac
    M_Q4 N03011 N03011 N02230 N02230 CMOSN
    + L=2u
    + W=25u
    M_Q6 N01848 N02912 N01565 CMOSP
    + L=10u
    ----$
    ERROR -- unknown parameter
    + W=12u
    V_VDD N01565 GND 5V
    R_R1 N03011 N02912 {250k*0.5+.001}
    V_VEE N02230 GND -5V
    M_Q1 N01848 N02344 N02024 N02024 CMOSN
    + L=1u
    + W=13u
    M_Q2 N01947 N02422 N02024 N02024 CMOSN
    + L=1u
    + W=13u
    M_Q7 N01947 N02912 N01565 CMOSP
    + L=10u
    ----$
    ERROR -- unknown parameter
    + W=12u
    M_Q8 N02912 N02912 N01565 N01565 CMOSN
    + L=2u
    + W=25u
    M_Q3 N02024 N03011 N02230 N02230 CMOSN
    + L=2u
    + W=50u

    **** RESUMING "diaforikos enisxutis-SCHEMATIC1-DIAFORIKOS2.sim.cir" ****
    .END"

    Thank you.(I try to attach the schematic but I was not permitted)
     
  2. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
    3
    You are missing the bulk connections for the mosfets where the errors occur. Declaration of a mosfet in spice is:

    MNAME D G S B MODEL [PARAMS]

    Anything inside [] is optional. Have a look at your netlist, for the mosfet that do not generate an error you have 4 nodes following the M_XX while the one that produces an error you have only 3 nodes.
     
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