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(Obsolete) Oscillator Tuning Probe: OSCTPROBE



This element is OBSOLETE and is replaced by the Oscillator Analysis Probe (OSCAPROBE) to simulate oscillators, then optimize any number of parameters to achieve the desired oscillation frequency (OSC_FREQ measurement). The details for OSCTPROBE are maintained here for backward compatibility.

OSCTPROBE initiates the tuning mode of oscillator analysis, whereby a circuit parameter is varied such that the circuit oscillates at a specified frequency.

Equivalent Circuit

OSCTPROBE 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
Freq Target frequency of oscillation Frequency 1 GHz
Par Tuning parameter(<type>.<id>.<param>)   <type>.<id>.<param>
*Par_low Lower parameter constraint (optional, mks) [1] 0
*Par_high Upper parameter constraint (optional, mks) [1] 0
*VpMag Guess at mag. of probe voltage (not used)[2]    
*VpPh Guess at ph. of probe voltage (not used)[2]    
*VpMax Maximum probe voltage in search (optional) Voltage 3 V
Vsteps Maximum number of voltage points in search Voltage 15
*Iter Max number of iterations for oscillator analysis   200
*Damp Convergence parameter for oscillator analysis   1
*Ftol Frequency relative tolerance (not used)[2]   1e-3

[1] Parameter values are entered in MKS units.

[2] Elements designated as "not used" are manipulated by the simulator in the course of 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.


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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