The TLE2426 is only rated for 20mA. I am needing 40mA to 60mA for my virtural ground in an audio circuit. I am experimenting with two different power supplies. One power supply is a +24 volt power supply were I use the TLE2426 as a rail splitter for +12VDC and -12VDC, and the virtural ground comes off of one pin of the TLE2426. Can I add two capacitors to the TLE2426 ground pin-- connected to the plus and minus rails to get greater current handling? Will adding these capacitors hurt the audio signal? I am not wanting some complex way to increase ground current. I just need a simple way to increase ground current as the TLE2426 does not output the needed ground current. Some have suggested using something like the OPA634 as a buffer to the ground. Again I do not need a complex buffer hookup, what would be a simple buffer arrangement? The other power supply I am experimenting with is a +9 volt power supply that feeds two MAXIM1044's hooked up in parallel. My arrangement arrangement boosts the 9 volt power supply to +9VDC and -9VDC rails, with a ground. I have NOT experiemented to see if the ground of the two MAXIM1044's hooked in parallel will have audio noise, but I doubt that these two little charge pumps will have the needed ground current. Since I suspect noise in the ground of the two MAXIM1044's, and I doubt there will be enough ground current, I have separated the ground again with the TLE2426 in the 9 volt power supply arrangement. This means I am back in THE SAME BOAT with either power supply set up I use. Please help me solve my virtural ground current problem.
I may have answered my own questions over the weekend. I found the Texas Instruments 1 and 2 watt DC to DC converters. My circuit draws 30.8 mA DC, and the little TLE2426 is only rated for 20mA. The little Texas Instruments DC to DC converters wil produce plus and minus voltage with a ground. They also have the needed current. The only questions still on my mind is audio noise, as the power is going to a small audio circuit involving a voltage controlled audio amplifier. The other problem with the little DC to DC converters is their $8.00 or more cost. Has anyone experienced audio noise using the little 1 and 2 watt DC to DC converters?
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