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question about psrr simulation (Read 2046 times)
chungming
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question about psrr simulation
Jan 05th, 2009, 7:09pm  
Hi ~
i have an LDO regulator. and i simulate it psrr.
i found it crossover 0db at about 90kHz (max +14dB).
but if i use a 10mV 90kHz sin wave , the output have only 3mV sin wave , equal -10.5dB.

what result is meaningful ?
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HdrChopper
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Re: question about psrr simulation
Reply #1 - Jan 6th, 2009, 6:42pm  
Hi chungming,

Could you clarify how you are measuring your psrr? That would help
Is the dc bias point for which you run your ac analysis the same one you are using for your transient analysis?

Regards
Tosei
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