Discussion Overview
The discussion revolves around simulating a CMOS astable circuit using OrCAD PSPICE. Participants are addressing issues related to the simulation setup, including component values, expected waveforms, and potential problems with the models used for the inverters.
Discussion Character
- Homework-related
- Technical explanation
- Debate/contested
Main Points Raised
- The initial poster describes their circuit setup and expresses difficulty in observing oscillations during simulation.
- One participant requests specific voltage readings at the inputs and outputs of the inverters, as well as the power supply voltages.
- The initial poster clarifies the voltage values at various nodes, indicating that V(1) is 5V and V(2) corresponds to both Vi and Vcc.
- Another participant suggests extending the simulation time, noting that the output voltages appear to be changing.
- A later reply questions the validity of the voltage readings, pointing out a potential issue with the inverter model being used and recommending the selection of a specific part number from the PSPICE library.
Areas of Agreement / Disagreement
Participants do not appear to reach a consensus on the cause of the simulation issues, with some questioning the model used while others suggest different approaches to troubleshooting the circuit.
Contextual Notes
There are unresolved questions regarding the accuracy of the device models in PSPICE and the implications of the chosen component values on the circuit's behavior.
