A simple circuit for converting a floating dual power supply is shown here.The circuit is based on a uA 741 op-amp. The input supply is splitted by the voltage divider circuit formed of R1 & R2 ,and given to the non-inverting input of the IC1. The output (Pin 6) is connected to the inverting input of the IC itself. This type of circuit consumes less standby current compared to conventional resistor only voltage splitters.
Circuit diagram with parts list.
- The current capacity of the circuit depends on the capacity of the op-amp itself.
- This power supply circuit can be used only for small loads (consuming less than 40mA).
- The IC1 must be mounted on a base.