how to increase the line regulation of a BGR

[Chethan]

Hi,
can we increase the line regulation of a BGR by some compensation ckt. I have designed an brokaw's arrow BGR whose line regulation is not soo good. can someone suggest me some compensation ckt.

thanx in advance

 

[paulux]

Both load & line regulations are related to loop gain depending on your circuit architecture. The obvious way is to increase the open loop gain of your design but remember to check your loop stability.

 

[huojinsi]

First,u are sure that ur bias ckt is normal operating with Vcc varying.
Second, try to increase the open loop gain.

 

[electronrancher]

hmm, i'm not sure if gain is the only factor - you can have a lot of gain, but if your mirrors have low output impedance then you will have a lot of line reg variation.

I suggest cascoding your mirrors.