WOLFRAM SYSTEM MODELER
InvertingSchmittTriggerInverting Schmitt trigger with hysteresis |
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Diagram
Wolfram Language
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SystemModel["Modelica.Electrical.Analog.Examples.OpAmps.InvertingSchmittTrigger"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This is a (inverting) Schmitt trigger. Resistance R1 can be chosen, resistance R2 is defined by the desired hysteresis. The output gets Vn for input voltage > 0 + vHys and Vp for input voltage < vHys*Vns/Vps.
The example is taken from: U. Tietze and C. Schenk, Halbleiter-Schaltungstechnik (German), 11th edition, Springer 1999, Chapter 6.5.2
Parameters (8)
| Vps |
Value: +15 Type: Voltage (V) Description: Positive supply |
|---|---|
| Vns |
Value: -15 Type: Voltage (V) Description: Negative supply |
| Vin |
Value: 5 Type: Voltage (V) Description: Amplitude of input voltage |
| f |
Value: 10 Type: Frequency (Hz) Description: Frequency of input voltage |
| vHys |
Value: 1 Type: Voltage (V) Description: (Positive) hysteresis voltage |
| k |
Value: vHys / Vps Type: Real Description: Auxiliary calculated parameter to be used in R2 calculation |
| R1 |
Value: 1000 Type: Resistance (Ω) Description: Arbitrary resistance |
| R2 |
Value: (1 - k) / k * R1 Type: Resistance (Ω) Description: Calculated resistance to reach hysteresis voltage |
Components (6)
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opAmp |
Type: IdealizedOpAmpLimited Description: Idealized operational amplifier with limitation |
|---|---|---|
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ground |
Type: Ground Description: Ground node |
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vIn |
Type: TrapezoidVoltage Description: Trapezoidal voltage source |
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vOut |
Type: VoltageSensor Description: Sensor to measure the voltage between two pins |
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r1 |
Type: Resistor Description: Ideal linear electrical resistor |
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r2 |
Type: Resistor Description: Ideal linear electrical resistor |