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More  Operational Amplifiers Circuits

Circuit Forms Ideal Diode Function
designed by David A. Johnson, P.E.

This circuit uses a low power op Amp and a p-channel FET to form a diode function with a very low 0.05 volt voltage drop.  With the selected FET, the circuit can handle up to 2 Amps of
current.  Higher currents are possible with a FET with a lower channel resistance. The total current drawn by the circuit during operation is a low 20 microamps.  The maximum voltage is 15v.

Click on Drawing Below to view PDF version of Schematic

Circuit forms Ideal Diode Function



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