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+9v and -9v from one 9V battery!

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ericgibbs

Well-Known Member
Most Helpful Member
hi peter,

Thanks for the link, however, the circuit is in common usage.

I was interested to see on the link, a guy claiming copyright on a circuit lifted
from the Maxim MAX1044 datasheet!.

Regards
 

Hero999

Banned
It's also possible with a 555 but you loose some voltage.
3470-negvoltgen.gif

https://www.csgnetwork.com/ne555c1.html
 

audioguru

Well-Known Member
Most Helpful Member
Hi Peter,
Any opamp will amplify AC signals when it has only a single supply voltage if its input DC voltages are about half the supply voltage, and coupling capacitors are used like these circuits show:
 

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