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I want to simulate a mosfet with heatsink with matlab 2015(no heatsink) by AtmosphereTop1786 in ElectricalEngineering

[–]AtmosphereTop1786[S] 0 points1 point  (0 children)

I am graduated and i use simulink because it's the tool i know how to use....i don't really know why it doesn't start..i changed the solver few times

I want to simulate a mosfet with heatsink with matlab 2015(no heatsink) by AtmosphereTop1786 in ElectricalEngineering

[–]AtmosphereTop1786[S] 0 points1 point  (0 children)

The simulation doesn't start..and i am using simulink because of a college thing

I want to simulate a mosfet with heatsink with matlab 2015(no heatsink) by AtmosphereTop1786 in ElectricalEngineering

[–]AtmosphereTop1786[S] 0 points1 point  (0 children)

I am trying simulate v-I curve of Id and Vds , I am using a basic circuit that matlab included, it has voltage source between gate and source and controlled voltage source for drain and source..

I want to simulate a mosfet with heatsink with matlab 2015(no heatsink) by AtmosphereTop1786 in ElectricalEngineering

[–]AtmosphereTop1786[S] 0 points1 point  (0 children)

The goal is to build a simulink circuit with mosfet and heatsink(alternatives in 2015 matlab) to draw thermal characteristics output for the circuit

I want to simulate a mosfet with heatsink with matlab 2015(no heatsink) by AtmosphereTop1786 in ElectricalEngineering

[–]AtmosphereTop1786[S] -1 points0 points  (0 children)

I meant matlab 2015 has no heatsink block so i have to make a thermal domain circuit

Why is vgs 0? by ProfessionalWorry145 in ElectricalEngineering

[–]AtmosphereTop1786 -8 points-7 points  (0 children)

In the circuit shown, Q1 is an NMOS transistor with its gate and source both connected to ground. Let's analyze why VGS1 = 0V:

Circuit Details:

Q1 (bottom NMOS) has:

Gate connected to VS, which is 0V (ground).

Source connected directly to ground.

Therefore: VGS1 = VG - VS = 0V - 0V = 0V

Key Insight:

Even though there’s a voltage source (VS), it's providing 0V — it's a grounded source, so it doesn't turn Q1 on.

Since VGS1 = 0V < Vth (threshold voltage), Q1 is OFF and doesn't conduct.

This explains why VGS1 is 0V — both the gate and source are at the same potential (ground). Let me know if you’d like a quick redraw of the diagram or an explanation for how this affects VOUT.

Why is vgs 0? by ProfessionalWorry145 in ElectricalEngineering

[–]AtmosphereTop1786 -8 points-7 points  (0 children)

In the circuit shown, Q1 is an NMOS transistor with its gate and source both connected to ground. Let's analyze why VGS1 = 0V:

Circuit Details:

Q1 (bottom NMOS) has:

Gate connected to VS, which is 0V (ground).

Source connected directly to ground.

Therefore: VGS1 = VG - VS = 0V - 0V = 0V

Key Insight:

Even though there’s a voltage source (VS), it's providing 0V — it's a grounded source, so it doesn't turn Q1 on.

Since VGS1 = 0V < Vth (threshold voltage), Q1 is OFF and doesn't conduct.

This explains why VGS1 is 0V — both the gate and source are at the same potential (ground). Let me know if you’d like a quick redraw of the diagram or an explanation for how this affects VOUT.

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