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current source for LDO's opamp
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jutek



Joined: 21 Oct 2005
Posts: 274
Helped: 5
Post25 May 2006 22:28   

ldo opamp
hello

i need a current source for LDO's opamp. Vin changes from 1.3 to 3.3 so i need something voltage independent. simple use of resistor to create a reference current is very inacurrate.

what can i use with so high voltage change?
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smartdream



Joined: 31 Mar 2006
Posts: 58
Helped: 5
Post26 May 2006 2:29   

Re: current source for LDO's opamp
You can available from bandgap.I think
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Post26 May 2006 2:29   

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nagag



Joined: 24 Jan 2006
Posts: 6
Post26 May 2006 16:19   

Re: current source for LDO's opamp
I think you can use constant gm bias circuit.You can refer razavi or John& martin for this.
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