7mA Bias Current

[krispiekream]

I have a 7mA Bias Current here.
What values of R541 and R542 can I use to make it a 10mA Bias Current?
Can someone please help me.
What formula can I use? which law was it.
thank you

 

[KlausST]

Hi,

Please post a link to the datasheet of the IC or device.
Or post a photo of the circuit where we can see details about the IC marking (100kBytes should be sufficient)

Klaus

 

[krispiekream]

or how do we get 7mA bias current given the circuit below is the question?

 

[krispiekream]

 

[KlausST]

Hi,

If you can post a part of the datasheet, why not give a link to the complete datasheet as requested?

Klaus

 

[d123]

Hi,

i) Iset x R542 = xyz voltage
ii) xyz voltage/R541 = Ibias current

e.g.

i) 10uA x 34k = 0.340V
ii) 0.340V/49.9R = 6.81mA

Ohm's Law.

 

[d123]

Hi again,

For anyone interested, a similar/identical device is the LT3092: Isource = 10uA x (Rset/Rout)