lxcpku
Junior Member level 3
ldo design psrr
hi,all
i have some questions about psrr in ldo design
1. if there are 3 sub-modules in my ldo , then psrr of ldo depends on the minmum psrr of the sub-module ,is that right ?
2. first i checked my bandgap's psrr. i wanna a psrr of 60db@10k,however ,in my design, only 57db@10k. then i checked the psrr of the opamp used in bandgap.which is 60db@100k and meets my needs. so how can i improve my psrr of bandgap without increase the Ac gain of opamp
anyone could give me some advice ?
suggestions and advice will always be welcome, thx a lot
hi,all
i have some questions about psrr in ldo design
1. if there are 3 sub-modules in my ldo , then psrr of ldo depends on the minmum psrr of the sub-module ,is that right ?
2. first i checked my bandgap's psrr. i wanna a psrr of 60db@10k,however ,in my design, only 57db@10k. then i checked the psrr of the opamp used in bandgap.which is 60db@100k and meets my needs. so how can i improve my psrr of bandgap without increase the Ac gain of opamp
anyone could give me some advice ?
suggestions and advice will always be welcome, thx a lot