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Orcad SPICE 10MHz Oscillator issue

We are trying to simulate a very basic oscillator circuit in SPICE. However, we can't seem to get it to work at higher frequencies. It properly oscillates at low frequencies of 1MHz but at higher one it fails.

Curious if anyone else is running into this?

oldmouldy over 2 years ago

Edit the Simulation Profile and set the Maximum Step Size to, say, 100p to force the circuit to be evaluated more often, this will also increase the time that the simulation takes. SPICE, and therefore PSpice, will try to optimize evaluation of the circuit to improve performance and this can cause "decay" in oscillator circuits.
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ZfeistyZ over 2 years ago in reply to oldmouldy

Thanks! That was it.
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