User Activity

  • Posted a comment on discussion ngspice-users on ngspice

    Thanks yo each of you for your help. In practice, some pins of some devices are often left dangling, and circuit works fine. I did not realize that the SPICE solver wants all unused pins to be grounded.

  • Posted a comment on discussion ngspice-users on ngspice

    Could some Bgspice guru please help ? I have a simple decade counter with 4 JK flip-flops and Level 3 MOSFETs. THe JK flip-flop works fine on its own = but when cascaded in series. The netlist and error message are listed below. Thanks in advance for your help. .PARAMS OFFSET=0.0 AMPL=4.5 DLY=0.0 TR=5.0us + TF=5.0us PW=15.0us PER=35.0us .SUBCKT INV 1 2 3 1 VDD 2 IN * 3 OUT M0 3 2 1 1 M_PMOS L=1.0u W=1.75u M1 3 2 0 0 M_NMOS L=1.0u W=5.0u .ENDS .SUBCKT BUFFER 1 2 3 4 5 6 7 8 9 1 VDD 2 IN 1 3 OUT 1...

  • Posted a comment on discussion ngspice-users on ngspice

    Could some Ngspuice guru please help ? The following simple 5 cell shift register has a nassive DC offset of 2.0 Volts at each of the output nodes, I have tried all the standard tricks such as transistor sizing, AC coupling but the problem does not go away. I am using Level 3 CMOS devices. Any hints/suggestions would be of immense help. Thanks in advance. .PARAMS ampl=1.75 dly=0.0 tr=10.0E-6 tf=10.0e-6 + pw=15.0e-6 per=30.0E-6 .SUBCKT INV 1 2 3 1 VDD 2 IN * 3 OUT M0 3 2 1 1 M_PMOS L=1.0u W=1.0u M1...

  • Posted a comment on discussion ngspice-users on ngspice

    Could some Ngspice guru please help ? I am right now doing lossy transmission line...

  • Posted a comment on discussion ngspice-users on ngspice

    The DC offset is seen at nodes 3, 4, i.e., at the end of the source resistors. I...

  • Posted a comment on discussion ngspice-users on ngspice

    Could some ngspice guru please help ? I have a coupled lossy transmission line model(both...

  • Posted a comment on discussion ngspice-users on ngspice

    Could some Ngspice guru please help ? I am trying to analyze a crystal oscillator,...

  • Posted a comment on discussion ngspice-users on ngspice

    Hello, Are you using some development version of Ngspice ? I downloaded your modified...

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