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1st March 2011, 02:17 PM
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diyAudio Member
Join Date: Jul 2010
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Can 555 circuit supply enough neg voltage
Can a 555 negative supply circuit, like the one below I pulled from another schematic, supply enough negative voltage to a LM324 and a AD736JN? I'm using a 9v battery for power. The LM324 needs supply current of 3mA and the AD736JNZ 200uA. The Circuit I got it from was supplying 1 TL072. The schematic I'm trying to build is using a MAX680 charge pump from 2 - 1.5v cells supply, but the MAX680 is a little too expensive.
Thank you 
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