An RC oscillator modeled with QSPICE's built-in behavioral Schmitt trigger, it is a TLC555 (CMOS 555)
| Authors | Uwe Schüler |
| Main Document | Article «Wide-range tunable RC Schmitt trigger oscillator» |
| Description | Figure 1 |
| File Format / Size | PDF / 27 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Wide-range tunable RC Schmitt trigger oscillator»
- Figure 1. An RC oscillator modeled with QSPICE's built-in behavioral Schmitt trigger, it is a TLC555 (CMOS 555)
- Figure 2. The typical triangle wave input and the square wave output, where the average power dissipation of R1 is around 6 mW
- Figure 3. Schmitt trigger oscillator, this time, with the parameter stepping of R1, the .meas commands for period and frequency measurement, and an auxiliary circuit that triggers AbortSim()
- Figure 4. Frequency versus potentiometer resistance curve in a log plot, interpolated over 100 measurement points
- Figure 5. Hacked Schmitt trigger oscillator with an expanded Figure 1 circuit that includes R2=RPOT in series with C1
- Figure 6. The typical triangle wave input with the output now reaching very high frequencies without excessively loading V(OUT)
- Figure 7. Frequency versus potentiometer resistance curve in a log plot, interpolated over 100 measurement points, showing a flatter curve profile and larger tuning range
- Figure 8. Frequency versus potentiometer resistance curve in a log plot, interpolated over 100 measurement points, showing a flatter curve profile and larger tuning range