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       #Post#: 144--------------------------------------------------
       Root Cause Table
   DIR By: johnhu
       Date: September 19, 2026, 9:50 pm
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       This is a working progess. I will start from Spring 2025 Bug
       tickets.
       [table][tr][td]  Symptom  [/td]
       [td]  Root Cause [/td]
       [td]  Bug Ticket    [/td]
       [td]  Circuit [/td]
       [td]  Contributor  [/td]
       [/tr]
       [tr][td]  Voltage amplitude on the oscilloscope is off [/td]
       [td]  The probe (1x/10x) setting was different from the
       oscilloscope's setting. [/td]
       [td]  2025-02-04
  HTML https://osudevtbshoot.createaforum.com/general-discussion/lab-1-calibration-station-1/<br
       /> [/td]
       [td]  Any[/td]
       [td]  Anonymous [/td]
       [/tr]
       [tr][td]Vout incorrect on the bench OR "floating point
       computation failed during matrix solution" in SPICE simulations
       [/td]
       [td]Positive and negative supplies for the chip are swapped OR
       pin-1 of chip rotated [/td]
       [td]2025-02-11
  HTML https://osudevtbshoot.createaforum.com/general-discussion/lab-2-pspice-simulation-error/<br
       />[/td]
       [td]Inverting amplifier using opamp [/td]
       [td]Anonymous [/td]
       [/tr]
       [tr][td]SPICE netlisting error [/td]
       [td]A voltage source is named the same as another signal's name
       [/td]
       [td]2025-02-11
  HTML https://osudevtbshoot.createaforum.com/general-discussion/lab-2-pspice-simulation-error/<br
       />[/td]
       [td]Any [/td]
       [td]Anonymous [/td]
       [/tr]
       [tr][td]Signal amplitude on oscilloscope differs from signal
       source's setting [/td]
       [td]Did not select HiZ or 50 Ohm correctly based on the load
       [/td]
       [td]2025-03-04
  HTML https://osudevtbshoot.createaforum.com/general-discussion/lab3-input-waveform/<br
       />[/td]
       [td]Any, diode-based voltage doubler [/td]
       [td]Anonymous [/td]
       [/tr]
       [tr][td]Output with no signal but all noise [/td]
       [td]Connectivity error: source resistor (Rs) not connected to
       signal generator but grounded [/td]
       [td]2025-03-04a
  HTML https://osudevtbshoot.createaforum.com/general-discussion/lab-5-circuit-troubleshooting/[/td]
       [td]Diode-based voltage doubler [/td]
       [td]Anonymous [/td]
       [/tr]
       [tr][td]Voltage amplitude on oscilloscope off by 1000x [/td]
       [td]Used AC coupling instead of DC coupling [/td]
       [td]2025-03-04c
  HTML https://osudevtbshoot.createaforum.com/general-discussion/lab-5-measurement-error/[/td]
       [td]Diode-based voltage doubler [/td]
       [td]Gunnar [/td]
       [/tr]
       [/table]
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