How does the opamp gain affect the temperature coefficient?

[sina25]

opamp bandgap

how does the opamp gain affect the temperature coefficient (TC)?, in a bandgap reference source that use an OPAMP to ensure two nodes have the same voltage

thanks

 

[rtarbell]

Re: opamp bandgap

I'm not too sure, but if I understand your question, look up this in google:

Brokaw bandgap reference

Depending on who designs the circuit, Brokaw references can (but do NOT always) use opamps in their design.

 

[eng_Semi]

Re: opamp bandgap

The TC of the opamp offset change the TC of the bandgap.

Try to dec the opamp offset

 

[xerxer]

Re: opamp bandgap

two clamped voltage is less 0.5mv if your bandgap voltage work well .its gain must be too large beacause of input offset .That your op works well is only reqiruments

 

[cookey]

opamp bandgap

The TC of bandgap is normally much higher than opamp.