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Circuits designed by David Johnson, P.E.
Last Updated on: Thursday, April 07, 2016 02:04 PM

Master Category List - Dave's Circuits

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FET Circuits
Dave's FET Circuits, Page 1, Page 2Page 3Page 4,

300v Peak to Peak Signal Generator  -  This circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall times . . . [Circuit by David Johnson P.E.,  06/03/00]


AC/DC relay from Charge Coupled MOSFET  -  This circuit acts as an AC/DC relay with a rating up to 50 volts peak and up to 10 Amps of current.  The differential oscillator supplies voltage to the gates of the two FETs with good isolation will drawing only 1.5ma of current . . . [Hobby Circuit designed by Dave Johnson P.E.,  10/16/05]

 


Astable Multivibrator with Very Low Power  -  This classic circuit draws only 200 nanoamps from a 1.5v supply . . . [Hobby Circuit designed by David A. Johnson P.E.,  06/10/00]


Bi-Directional Charge Coupled Powers MOSFET Relay  -  The circuit uses an inexpensive C-MOS inverter package and a few small capacitors to drive two power MOS transistors from a 12v to 15v supply. Since the coupling capacitor values used to drive the FETs are small, the leakage current from the power line . . . [Hobby Circuit designed by Dave Johnson P.E.,  06/03/00]


Dave's FET Circuits,
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