modelOpAmp
Hifi operational amplifier circuit
Information
This circuit represents a commercial Hifi operational amplifier built from 12 individual bipolar transistors, six of which are vertically diffused NPN transistors, whereas the other six are laterally diffused PNP transistors.Each transistor has a (red) heat port and a (green) substrate node. The heat port uses a different color embracing the philosophy of Modelica libraries, which distinguish different connectors by color to make it visibly unlikely that impossible connections are being made by the user. The substrate node is an electrical node and should therefore be drawn in blue. However, we decided to use a different color to prevent the circuit from becoming unreadable due to an abundance of connections.
All internal heat ports need to be tied to the external heat port. All internal substrate nodes need to be tied to the lowest voltage, i.e., the external Vee port.
References:
- Cellier, F.E. (1991), Continuous System Modeling, Springer-Verlag, New York, pp. 216 ff.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | Level | 2 | Transistor modeling level (Ebers-Moll = 1; Gummel-Poon = 2) |
| Modelica.SIunits.Time | rampTime | 3e-6 | Ramping period |
| Advanced | |||
| Boolean | enforceStates | true | Use electrical variables as states instead of bond graph variables |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Electrical.Analog.Interfaces.Pin | vi_n | Negative input electrical connector | |
| Modelica.Electrical.Analog.Interfaces.Pin | vi_p | Positive input electrical connector | |
| Modelica.Electrical.Analog.Interfaces.Pin | vo | Output electrical connector | |
| Modelica.Electrical.Analog.Interfaces.Pin | vcc | High support electrical connector | |
| Modelica.Electrical.Analog.Interfaces.Pin | vee | Low support electrical connector | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | heatPort | Thermal connector |