Help! How do I make ia ring oscillator oscillate in cadence?

[Hitotsu]

ring oscillator cadence

Pls help.
Attach is my schematic diagram

 

[saro_k_82]

ring oscillator layout cadence

Just initialize one of the nodes to zero volts using nodeset or initial condition.

 

[oermens]

cadence oscillators

add a small cap with an initial condition on one fo the nets or apply initial condition to the net by ADE->Simulation->Convergence Aids->Initial Condition

 

[Hitotsu]

ring oscillator cadence simulation

Thank you very much, it works like wonder