Nonlinear Differential Equation

[b2386]

Hi all,

Can anyone please give me an example of a nonlinear differential equation used to model a certain type of circuit?

Thanks

 

[mdelisio]

Cuha's circuit is a pretty famous one:

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[b2386]

So in order for a circuit to be modeled by a nonlinear differential equation, the circuit must contain a nonlinear resistor?

 

[waht]

A circuit has to contain a non-linear element like a diode or transistor to behave non-linearly.

A tunnel diode behaves as if it had negative resistance. As the voltage across the diode is increased, current decreases. That leads to cool modelings and applications such as oscillators.