The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> Mixed-Signal Design >> 0.13um bandgap
https://designers-guide.org/forum/YaBB.pl?num=1173928386

Message started by jim on Mar 14^th, 2007, 8:13pm

Title: 0.13um bandgap
Post by jim on Mar 14^th, 2007, 8:13pm

Dear all,

We want to design the bandgap reference with 0.13um process 1.2v device, Is it ok?

Thanks in advance,
Jim

Title: Re: 0.13um bandgap
Post by SATurn on Mar 18^th, 2007, 7:48am

It highly depends on the specs you wish achieve. In general, it is possible to design very low-voltage BGRs, even below 1.2V (you can have a look on IEEExplorer). In this case of course the reference voltage would be smaller than the usual value (i.e., 1.12V).

SATurn

Title: Re: 0.13um bandgap
Post by jim on Mar 19^th, 2007, 12:43am

Dear SATurn,

Thanks a lot for your reply,It's a pity that I haven't a IEEE account, so I couldn't download paper from it . Could
you please forward some papers to me?

email address: fujj_2003@163.com

Thank you very much and best regards!
Jim

Title: Re: 0.13um bandgap
Post by chase.ng on Mar 20^th, 2007, 12:49am

The theoritical minimum headroom for current mode bandgap can goes down to vbe+vdssat which can be lower than 1 V. However, as the voltage goes lower, I found it harder to achieve good accuracy.

Regards,
Chase

Title: Re: 0.13um bandgap
Post by SATurn on Mar 21^st, 2007, 10:35am

Let me try.

SATurn

Title: Re: 0.13um bandgap
Post by fangjh on Apr 8^th, 2007, 6:03pm

Hi:jim
I have design 0.13um bandgap, and the output voltage is 0.525v, the chip's performance have some problem , you should be care the start up circuit 's margin, otherwise the bandgap should not be start normal, other parameter is ok, 1V-1.4v: variable 4mv and temp 0-85c : about 3mv.

Title: Re: 0.13um bandgap
Post by jim on Apr 27^th, 2007, 12:36am

Hi fangjh,

Thanks a lot for your reply.

Jim

Title: Re: 0.13um bandgap
Post by loose-electron on May 23^rd, 2007, 5:44pm

Have you considered doing a 1.2V output BG (flattest thermal response) and using the I/O transistors? Also, if you dont have the 1.6V (give or take) to run that, you can use charge pumping to create it internally.