[sdiy] VReg as op amp bias source

Justin Owen juzowen at googlemail.com
Thu Nov 12 19:54:13 CET 2009


Hello,

Is there anything stopping me from using a VReg as a bias source for the non-inverting pin of an opamp?

Current concerns aside - if I had, for example, 6 op amps that all needed the non-inverting pin biased to VCC/2 - is there a reason why I couldn't/shouldn't set up an LM317 at VCC/2 and run them off that?

Obviously for VCC/2 I *could* just use 2 x 10K resistors - but I have a requirement for a bunch of voltage references that are going to make resistor selection a little difficult.

Thanks.

Justin







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