what is psrr of bandgap??

[mendenz]

in allen's book , psrr is defined as' the product of ration of the change in supply voltage to the change in output voltage of amp caused by the change in the power supply and the open loop gain of op amp'

psrr=ΔVdd/ΔVout*Av(s)
so,l think psrr is only for amp, if it can be used for bandgap,what is the Av(s)?
thanks

 

[leo_o2]

Av=1?

 

[gevy]

I think that Av=1 and therefore PSRR =Δvdd/ΔVout

 

[qslazio]

normalized Av=1 , it's just to describe the stability of output voltage Bandgap

 

[qutang]

I think PSRR is not the ripple rejection in voltage regulator! are you agree?

 

[lijun_sun]

i agree.

 

[dasong]

Who can tell me how to caiculate PSRR of the bandgap reference ,and how to improve the PSRR,I think it different to the PSRR of OPA.

Added after 3 minutes:

I forget to say my bandgap reference don't use OPA ,it use the cascode circent mirror.