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Design >> RF Design >> how to simulate the stability of LDO(connected wit
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Message started by wave3x on May 8^th, 2007, 7:51pm

Title: how to simulate the stability of LDO(connected wit
Post by wave3x on May 8^th, 2007, 7:51pm

because VCO always change the frequence

Title: Re: how to simulate the stability of LDO(connected
Post by sheldon on May 9^th, 2007, 5:25am

Wave,

Never tried this configuration before, but SpectreRF
periodic stability analysis should be able to calculate
the stability characteristics of the circuit. To use,
1) Calculate the periodic operating point, that is, run
autonomous PSS
2) Run Periodic stability analysis, pstab

In the past, I have used this analysis to calculate the
gain and phase margin of dynamic circuits, for example,
DC-to-DC Converters and VCOs. You just need to make
that you correctly define the loop.

Best Regards,

Sheldon

Title: Re: how to simulate the stability of LDO(connected
Post by wave3x on May 9^th, 2007, 6:20pm

thanks