Compare the AC response with the 100 Hz Transient waveform, then change R1 or C1 and rerun.
Open and run
- Open Examples from the Home ribbon.
- Choose RC low-pass filter.
- Open Simulate and choose Setup to review the analyses.
- Choose Run for one analysis or Run All for the complete configured set.
- Select a matching Scope view after the run. Use Save as sheet to keep the example or Discard to close it.
Sheets, analyses, and Scope
RC low-pass filter
Setup: AC frequency sweep
| Analysis | Configuration |
|---|---|
| AC |
|
| 100 Hz transientTransient |
|
Scope views and expected results
Low-pass frequency response
Analysis: AC
Waveforms
V(vin)V(vout)
100 Hz waveform
Analysis: 100 Hz transient
Waveforms
V(vin)V(vout)
Python scripts
These scripts are included with the example. Review trusted project code before choosing Run.
RC R sweep.py
Default sheet: RC low-pass filter
sheet = get_sheet("RC low-pass filter").override(V1=ac_source(1))
resistances = ["1k", "2.2k", "4.7k", "10k", "22k"]
runs = sheet.sweep(R1=resistances).ac("1", "1Meg", points=100, sweep="dec", save="V(vout)")
fig, (mag, phase_ax) = subplots(2, 1, title="RC low-pass R sweep", sharex=True)
mag.set(title="Magnitude", ylabel="|Vout| (dB)", xscale="log")
phase_ax.set(title="Phase", xlabel="Frequency (Hz)", ylabel="Phase (deg)", xscale="log")
for resistance, result in zip(resistances, runs):
mag.plot(result.v("vout").db, label=f"R={resistance}")
phase_ax.plot(result.v("vout").phase, label=f"R={resistance}")
fig.show()