Current source circuit with independently regulated current value & temp coefficient

[Alex_IC]

Current source circuit with independently regulated current value & temp coefficient

Hello!

Can somebody suggest to me a current source circuit (cmos or bjt, bicmos) wich has feature of independent regulation of current value and temp coefficient of the current?

 

[layoutmaster]

Current source

Look for a IPTAT current mirror in any good Analog Design book, for instance in Boyce-Baker's CMOS Circuit, Design, Layout and SImulation...

 

[steadymind]

Re: Current source

how about trying a constant gm current source. theoritically it is independent of temp variation and power supply variations.

:!:

 

[Alex_IC]

Re: Current source

It is not possible to set up independently particular current value and current drift for constant Gm current source. Because they are dependent on each other.

 

[leo_o2]

Current source

What's your requirement? Independent on regulation of current value? How about trying to generate a current source with Vbg/R. R can be an external resistor for accurate.

 

[Alex_IC]

Re: Current source

Thanks for reply. I've got answer.

 

[caosl]

Re: Current source

PTAT+CTAT current will produce the small temp coefficient current source, but the corner variation is difficult to dealt with except for using external resistor