.ChaoticCircuits.ColpittsCircuit .ChaoticCircuits.ColpittsCircuitColpitts' circuit is a simple nonlinear circuit which shows
chaotic behaviour, based on a transistor.
Note: There are different variants of the
Colpitt's oscillator. The one used in this example is based on:
Plot v1 vs. v2.
Default parameter RE = 5000 Ω (AnalyticEquations and
IdealCircuit) resp. RE = 2000 Ω (Improved Circuit)
shows nearly periodic results, i.e. the result varies within a
narrow band. It seems that this circuit is extremely
sensible.
Change parameter RE = 500 Ω to obtain chaotic
results.
Note that initial condition = 0 is sufficient!
Note: The AnalyticEquation and the IdealCircuit use a
simple transistor model according to the following equations:
iC = β*iB
Ron*iB = if
vBE≤Vth then 0 else (vBE -
Vth)
| Name | Description |
|---|---|
 AnalyticEquations |
Colpitts chaotic Circuit |
 IdealCircuit |
Colpitts chaotic Circuit |
 ImprovedCircuit |
Colpitts chaotic Circuit |