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Oscillator Analysis Probe: OSCAPROBE



OSCAPROBE initiates a large-signal oscillator simulation. See “Nonlinear Oscillator Analysis” for the recommended placement of OSCAPROBE and for details of oscillator analysis.

Equivalent Circuit

OSCAPROBE is an ideal source in series with an ideal impedance element. The impedance presents an open circuit at all frequencies other than the fundamental frequency of oscillation.


Name Description Unit Type Default
ID Element ID   X1
*F0 Initial guess at oscillation frequency (only used by APLAC)[1]   1 GHz
Fstart Frequency range start Frequency 1 GHz
Fend Frequency range end Frequency 2 GHz
Fsteps Max numb. of freq. points in search   200
*VpMag Guess at mag. of probe voltage (only used by APLAC)[1]    
*VpPh Guess at ph. of probe voltage (not used)[1]    
*VpMax Maximum mag of probe voltage in search Voltage 8
Vsteps Maximum number of voltage steps in search Voltage 40
*Iter Max number of iterations for oscillator analysis   200
*Damp Convergence parameter for oscillator analysis   1
*Tone Tone index for oscillation frequency (not implemented)   1
*Ftol Frequency relative tolerance (not used)[1]   1e-3
*Pert Perturbation factor   1e-6
*InitHarm Number of harmonics in initial search    
*NLMethod Solution method: Samanski=0, NNES=1   1
*IterExtrapSweep Sweep iteration to start extrapolation at (large number to turn off)   5
*OptMethod Optimization method used to find the oscillation conditions (only used by APLAC). Try changing this parameter if oscillation conditions are not found.   MinMax
*TranKick Transient analysis kick   Yes

[1] Elements designated as "not used" are manipulated by the simulator during oscillator analysis. Their values have no effect on simulation.

* indicates a secondary Parameter

Parameter Details

See “Nonlinear Oscillator Analysis” for the theory behind oscillator analysis and for a detailed discussion of the oscillator probe and its parameters.


This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.

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