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DC to DC Power Supplies Converter Circuits
Designed by David A. Johnson, P.E.

Last Updated on: Monday, August 18, 2008 04:19 PM
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More Converter Circuits

DC to DC Power Supplies    Converters: Frequency to Voltage     Converters: Period to Voltage    
Converters: Sine to Square Wave      Converters: Voltage     Converters: Voltage to Frequency 
High Voltage Power Supplies    Switchmode Power Supplies  Voltage Controlled Oscillators

 

  • 0.5V Negative Supply
    Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps.  It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits, which need to have a true zero volts output.


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