Help about bandgap circuit design

[holddreams]

I design a circuit just like the one on razavi's book.
I run a .tran analysis ,given vdd a pwl

but in tt_corner and ss_corner,the output change about 10mv,too big,

how should i do?

thx.

 

[walker8764]

what is "tt corner"? should be "ff corner"?

 

[Robert Qi]

holddreams, you can do temp sweep of every corer.
change the R ratio to get zero coefficient curves.Voltage varies 10mv with temperature in one corner is too big.
But I think for different corners 10mv is not too big.

walker8764, tt means typical nmos and typical pmos
ff means fast nmos and fast pmos