Electronics Experiments: Have you ever wanted to build a circuit to run off a single 9 Volt battery only to find you needed levels like +12 and -12 Volts? The thought of multiple batteries might have put you off. Why not use a simple DC to DC converter? /
http://www.elexp.com/t_dc-dc.htm
alkaline 9V batteries are ideal for many portable, handheld applications, this circuit generates a bipolar supply of 5V and 2.3 to 4V using a precision 5V reference and one op amp as a supply splitter
http://www.edn.com/archives/1997/071797/15di_05.htm
can supply from +/-1.2V up to about +/-25V, will current limit at around 800mA
http://sound.westhost.com/project44.htm
low noise regulated +/-15V power supply
http://sound.westhost.com/project05.htm
easy to build and adjustable from 0-15 volts
http://www.aaroncake.net/circuits/supply3.htm
gives +/-15V outputs and takes power from external AC power supply
http://sound.westhost.com/project05.htm
suitable for powering opamp circuits
http://www.psyber.com/~dibsed/CIRCATS/opamp-ps.pdf
outputs regulated +-15V
http://www.renkus-heinz.com/Schematics/CONTROLERS/POWER_SUPPLY_X12-X14-X24.pdf