|Created||April 10, 2012|
|Last modified||April 10, 2012|
|Tags||initial-conditions oscillator-startup startup|
Sometimes you have to kick an oscillator out of an initial, metastable state so that it starts reliably at a user defined time in the simulation. This shows a way to do that.
Sometimes, circuits, particularly oscillators, start up in a metastable state. SImulated circuits do not have the device and supply noise that normally nudges real circuits out of this metastable state. Although not actually needed for this example. this circuit shows one way to kick an oscillator out of an initial, metastable state so that it starts reliably at a user defined time in the simulation. Normally this time would be right at the start of the simulation, i.e. T=0, but in this example the time controlled switch is changed 100us after the start of the simulation. This example shows a way to introduce a step into the supply voltage to disturb the circuit equilibrium and so start oscillation.
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