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i think the book is wrong, you don't have to use same bias current of Q1 and Q2 when you design BGR. And the current ratio of this given circuit is n:1.
hi
now i design basic voltage regulator structure with error amp. the thing special is that i used pseudo amplifier for an error amp for low supply voltage operation.
as you know, pseudo amplifier is simple 4 TR structure (5 TR single-ended op-amp without tail current)
in my application, 20...
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