bandgap reference.....vref=1.2v

[ankit12345]

i need a band gap ref voltage ckt which can produce 1.2v for temp raNGE OF -40 TO 125'C......supply varies frm 1 to 1.5..................i need the ckt with w/l ratio.....which can be implemented in .6 r 1.8 micro tech..
BYE~~

 

[sunking]

charge pump + bandgap

 

[ankit12345]

Dear sunking,

"charge pump + bandgap"

can u explain in detail please...
Thanks~~

 

[eng_Semi]

U can design a charge pump to produce a certain current, with this low supply. Then passing the output current in a branch which contain a resistor in series with a bipolar transistor.

 

[rfsystem]

Is it possible to redefine the requirement of 1.2V at VDD=1.0..1.5V. So that the bandgap output is 0.6V instead of 1.2V?

 

[sorata]

how it is possible to get the reference voltage of 1.2v with the power supply under 1.2v?

 

[eng_Semi]

I think that I am wrong, and it appears that this requirement is hard to achieve