Jan 6, 2009 #1 C chungming Full Member level 1 Joined Mar 23, 2006 Messages 96 Helped 3 Reputation 6 Reaction score 0 Trophy points 1,286 Activity points 2,041 psrr simulation 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 6mV sin wave , equal -4.4dB. what result is meaningful ?
psrr simulation 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 6mV sin wave , equal -4.4dB. what result is meaningful ?
Jan 11, 2009 #2 D DenisMark Full Member level 6 Joined Sep 16, 2005 Messages 324 Helped 104 Reputation 208 Reaction score 36 Trophy points 1,308 Location Russia Activity points 3,439 psrr with transient simulation Transient simulation of course. AC computes solution around linearized circuit. The same thing for AC stability which always has to be confirmed by transient simulations.
psrr with transient simulation Transient simulation of course. AC computes solution around linearized circuit. The same thing for AC stability which always has to be confirmed by transient simulations.
Jan 15, 2009 #3 J jianjing526 Member level 2 Joined May 5, 2008 Messages 47 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,549 Transient results tells a real response. AC helps you to analyse but can't tell the true reaction!