Simulation Log and QSPICE Debugging

QSPICE
1
  • The Issue: Ctrl + L triggers the “Draw Line” tool instead of the Simulation Log. Pls advise if I have the wrong command.
  • The Goal: To view the results of a .meas command for an i-Clamp circuit. (.meas tran ScourTime TRIG I(Rclamp)=1µ rise=2 TARG I(Rclamp)=1µ fall=2)
  • The Setup: Using a PULSE(0 1 0 1u 1u 10m 20m) stimulus and .tran 0 40m 0 1u.
  • The Problem: The “Output” (.meas tran peakval max abs(i(rclamp)):
    4.9738e-17 (at Time=0.0213046)
    .meas tran tau trig abs(i(rclamp))=1µ rise=1 targ abs(i(rclamp))=1µ fall=1:) while Rclamp output does appear in the Viewer
    , and the “Simulation Log” is missing from the View menu.
    V1
    |
    R1 (18k)
    |
    OUT
    |
    C1 (330n)
    |
    GND

Regards,

2

@Terry2000 ,

Can you upload your .qsch to this thread?

Len

3

Refer to Qspice Help

image
image1229×416 36.1 KB

4

Thank you.

Where might I find information to help me simulate Time-Domain? when using
.meas tran ScourTime TRIG I(Rclamp)=1u rise=1 TARG I(Rclamp)=1u fall=1
Output:
.meas tran peakval max abs(i(rclamp)):
4.9738e-17 (at Time=0.0213046)
.meas tran tau trig abs(i(rclamp))=1µ rise=1 targ abs(i(rclamp))=1µ fall=1:
( nan, nan)
The viewer shows the rclamp waveform but I can’t fathom how to extract the time-domain. Is there a simulation log?Help appreciated.

Regards

5

@ Len
Thanks. I have concluded I can’t measure because the GNF of my amp’s design is too strong and that’s swamping everything. Still much to learn!
Cheers

6

You are a basic member and should be able to upload files. (pull your .qsch into reply message box). It is easier to provide help if you can upload your schematic.