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[SOLVED] How to simulate a ring VCO using HSPICE

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Kristya

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I'm learning HSPICE. When simulating a ring VCO, I can't get oscillating wave. It seems to be locked,but i'm sure the connection is right for the netlist is available on Cadence Spectre. Is there any issues.

Thanks in advance.
 

erikl

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In your transient simulation switch on the power supply.
 

Kristya

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I've tried PWL voltage source on VDD,still doesn't work.
I add a control command .option accurate=1 ,then it work.

Thank you anyway .
 

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