Apr 15, 2009 #1 B bharathr87 Member level 1 Joined Jan 27, 2009 Messages 34 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,482 How do u find the PSRR in cadence spectre through simulation? you have to give an AC signal at Vdde right?and after that how do you find the value of PSRR?
How do u find the PSRR in cadence spectre through simulation? you have to give an AC signal at Vdde right?and after that how do you find the value of PSRR?
Apr 16, 2009 #2 M mengcy Member level 5 Joined Aug 21, 2006 Messages 90 Helped 11 Reputation 22 Reaction score 5 Trophy points 1,288 Location shanghai Activity points 1,747 see the ac gain of the output voltage. that is the ac gain Vout/Vdd,named PSR. if you want to know PSRR,you must simulate the gain of Vout/Vin.
see the ac gain of the output voltage. that is the ac gain Vout/Vdd,named PSR. if you want to know PSRR,you must simulate the gain of Vout/Vin.
Apr 16, 2009 #3 B bharathr87 Member level 1 Joined Jan 27, 2009 Messages 34 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,482 how to find the ac gain of the o/p...can u find it frm the ac gain plot?
Apr 27, 2009 #4 M mmic1978 Junior Member level 2 Joined Mar 31, 2009 Messages 22 Helped 2 Reputation 4 Reaction score 0 Trophy points 1,281 Activity points 1,366 see the ac gain of the output voltage. that is the ac gain Vout/Vdd,named PSR. if you want to know PSRR,you must simulate the gain of Vout/Vin. if you connect your OPA as unity gain buffer, Vout/Vin=1 then , you can get PSRR from =PSR/1
see the ac gain of the output voltage. that is the ac gain Vout/Vdd,named PSR. if you want to know PSRR,you must simulate the gain of Vout/Vin. if you connect your OPA as unity gain buffer, Vout/Vin=1 then , you can get PSRR from =PSR/1
Apr 27, 2009 #5 PaloAlto Full Member level 4 Joined Oct 8, 2007 Messages 194 Helped 35 Reputation 70 Reaction score 10 Trophy points 1,298 Location Cádiz, Spain Activity points 2,506 mmic1978 said: if you connect your OPA as unity gain buffer, Vout/Vin=1 then , you can get PSRR from =PSR/1 Click to expand... Uuummmm, is your gain going to be 1 for the entire frequency range? ;-))) You better just use the ratio, that's safer.
mmic1978 said: if you connect your OPA as unity gain buffer, Vout/Vin=1 then , you can get PSRR from =PSR/1 Click to expand... Uuummmm, is your gain going to be 1 for the entire frequency range? ;-))) You better just use the ratio, that's safer.