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Circuits designed by David Johnson, P.E.

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Last Updated on:  06/18/2009 04:27:28 AM

DC to DC / Switch Mode and DC to DC Converters  
Voltage Converters

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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.

Circuit 0.5V Negative Supply designed by David Johnson, P.E. (May 20, 2005)

DC to DC / Switch Mode and DC to DC Converters   Voltage Converters
Master Schematic Category List - David A. Johnson, P.E.
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