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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim Component Models >
Probes >
   Oscillator Probe       

Oscillator Probe

Oscillator Probe Netlist Format

To enable oscillator analysis, the circuit must include an oscillator probe device. The netlist syntax for this device is:

Rxxx positive negative OSC_PROBE=1 A=val FREQ=val

The oscillator probe element can have any name beginning with “R”. Positive is the positive node and negative is the negative node.

The OSC_PROBE=1 parameter is required to distinguish the oscillator probe from a resistor.

The probe behaves like an oscillating voltage source with voltage amplitude given by the parameter A at the frequency given by the parameter FREQ. At all other frequencies, the probe current is zero. The default for parameter A is zero volts. The default for parameter FREQ is 1e6Hz.

The oscillator probe is a frequency domain element; in the time domain (for example, in transient and DC analyses) the oscillator probe behaves like an open circuit.

The oscillator probe applies a small voltage at a known frequency. The initial guess at the circuit oscillating frequency is controlled by the initial_guess option (see Initial Guess for Oscillator Frequency). The voltage given by parameter A is always used as the initial probe voltage. The simulator adjusts the frequency and voltage until both the real and imaginary components of the probe current (I_probe) are zero, that is, Re(I_probe) = 0 and Im(I_probe) = 0. The frequency where this occurs is the oscillating frequency.

Oscillator Probe Netlist Example

Rprobe1 net_34 net_27 OSC_PROBE=1 A=0.005 FREQ=3e6

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