Ken Kundert
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An injection-locked oscillator should be simulated as a driven circuit, not as an autonomous circuit.
Choose the 'beat' frequency to be the fundamental frequency (the common submultiple of the stimulus and the locked oscillation frequency), and choose tstab to be large enough so that the oscillator reaches lock before tstab expires.
To confirm that you have the 'beat' frequency and the tstab correctly, you can run a transient analysis with strobing. You should set the strobe frequency equal to your chosen beat frequency and simulate for at least tstab. With strobing, any signal you choose should appear to either settle or at least be close to settling by the time you reach tstab.
-Ken
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