I haven't done much with a single supply, the job I'm working on has some restrictions.
The circuit is actually powered from an AC supply, not batteries, so the voltage regulation is not perfect. The main positive supply is an LM317. The output is 10V, the voltage regulation is probably about 4mV or so. This is fine to power all op amps and other IC's, transistors.
I'm not sure if it's feasible to split this 10V supply to derive a 5V bias voltage to use as the ac ground. I'm not sure how clean this virtual ground needs to be. The circuit is all pre-amp stuff - with signals in the range of 20mV to 1V.
If my virtual ground has 4mV of ripple in it isn't that going to effect my circuit by causing a lot of distortion?
or is it not giong to be audible?
Would I get a better reference by using a 5V reference diode like an LM336Z-5.0 (since it's dereived from ground and not the shaky positive supply)?
The circuit is actually powered from an AC supply, not batteries, so the voltage regulation is not perfect. The main positive supply is an LM317. The output is 10V, the voltage regulation is probably about 4mV or so. This is fine to power all op amps and other IC's, transistors.
I'm not sure if it's feasible to split this 10V supply to derive a 5V bias voltage to use as the ac ground. I'm not sure how clean this virtual ground needs to be. The circuit is all pre-amp stuff - with signals in the range of 20mV to 1V.
If my virtual ground has 4mV of ripple in it isn't that going to effect my circuit by causing a lot of distortion?
or is it not giong to be audible?
Would I get a better reference by using a 5V reference diode like an LM336Z-5.0 (since it's dereived from ground and not the shaky positive supply)?