Dear transB:
Thanks again for your help,I confirmed for your Q1 & Q2
And I can not find a RHP from the p/z mapping I posted
for Q3, It does have effect to the zero, it shirt the zero about only one decade by varying the resr from 10m~1 ohm, so I think it not the domain factor to form the zero.
Another bad news I want to tell you, The circuit will oscillate on the -40'C~0"C under test. It may be occured a imagnary poles pair after Unit gain Bandwidth,and make the phase decease fastly.
may be it not a good method to compensation a LDO.
Best Regards
ck_seu@yahoo.com.cn
Added after 2 minutes:
Dear transB:
Thanks again for your help,I confirmed for your Q1 & Q2
And I can not find a RHP from the p/z mapping I posted
for Q3, It does have effect to the zero, it shirt the zero about only one decade by varying the resr from 10m~1 ohm, so I think it not the domain factor to form the zero.
Another bad news I want to tell you, The circuit will oscillate on the -40'C~0"C under test. It may be occured a imagnary poles pair after Unit gain Bandwidth,and make the phase decease fastly.
may be it not a good method to compensation a LDO.
Best Regards
ck_seu@yahoo.com.cn