Created by
Created May 12, 2013
Last modified May 15, 2013
Tags dual   dual-power-supply   op-amp   power   power-supply   supply   transistor  


This is a circuit that converts a single supply to a double supply without using a centre tapped transformer.


The principle of this circuit is that 2 transistors are used as voltage dividers to give a ground reference. The op amp has one input connected to a reference voltage decided by the 2 1k resistors and compares it to the potential between the two transistors . When the the 'ground' starts shifting then the op amp recompensates base bias of the transistors and keeps it at reference voltage


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