raja.cedt
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Hello- Looks like problem with the design rather simulation. Just to make sure no issue with the initial condition, apply a 10mv power supply step on the actual vdc or add a pulse current at the o/p of the first stage.
In case if it didn't oscillate with the above stimulus, probably you will have to check how much gain you have in the cell, if it is too low (> 1.414 at the frequency of interest) you have to increase the gain.
Few observations based on your plots:
1------In the operating point (first fig), you could see input voltage around 0.9, where as in transient it has settled to 1.7 (close to vdd) which doesn't make sense to me. 2------you should have ran simulation for few micro-seconds, because there may be some startup delay as well. That's why it's always better to run PSS which will tell you clearly.
Best regards, Raj.
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