How to design a bandgap circuit that generates 2.1V ?

[Question]

About bandgap circuit

I need a bandgap circuit to generate 2.1V voltage in my DAC design. But I have no experience in it.

Plz give me some advice (topology or papers) about designing it.

Thanks.

 

[nxing]

About bandgap circuit

check any analog books (Razavi's or Allan's) or go to www.circuitsage.com, you will find lots of this kind of circuit

Good Luck!

 

[andy2049]

Re: About bandgap circuit

The ebook in the following link also has a chapter about the bandgap:

**broken link removed**

 

[Question]

Re: About bandgap circuit

Ok, I will go to this address.

Tahnks a lot.

 

[sunking]

Re: About bandgap circuit

Allen book

 

[sadfish]

About bandgap circuit

In general, bangap will generate a voltage of 1.2V.
You can apply the 1.2 to a resistor to generte a current and then use current mirror to enlarger the current by 2.1/1.2. Let the current pass the same resistor you will get 2.1v voltage.

 

[bluestatic]

Re: About bandgap circuit

Try to use a resistor devider, you can generate any voltage you want from the 1.25V bg refrence.

 

[rajath]

Re: About bandgap circuit

Or in the core bandgap voltage generator, you can simply mirror the PTAT current that is generated, and pass it through the required resistor. Of course, do remember that the voltage generated will be temperature dependent.