close to ideal diode -- p-mosfet p-bjt

Voltage drop is ultra low! However, this diode is far from ideal. It does has a high threshold voltage, realistic is here more than 2V (check Vgs setting), which is by far more then a silicon have. Also its quite slow if you model gate and drain capacitance, only a few 100Hz. Futher, it does draw above 0.6V and 2V already some current, cuz of the PNP reference diode for the current mirror. Dont get me wrong, this kind of diodes does have its applications in special areas like e.g. protection and rectifier, but they are absolut not ideal or in general perfect diodes! Keep it up!

thanks for the comment. What title do you suggest that would fit better this circuit? I am using this for a USB_5v-battery ORing (an additional mosfet cuts battery to load, powering via the USB power, while a charger module takes care of the battery itself). Unrelated question, do you know how to drag&drop multiple components at once (chrome & anroid)?

Super diode is the term. It is different than ideal diode.

thanks i have renamed

I agree Hurz, this circuit doesn't exactly mimic an ideal diode, but when used when power supply OR'ing its characteristic is pretty close to an ideal diode characteristic minus things like speed. Any reference I've ever seen to super diodes is usually referencing a precision rectifier. Precision rectifier and super diode seem to be used interchangeably as far as I can tell but I suppose this is just semantics. Terms like super diode and ideal diodes are used pretty loosely just like most things in electronics. In any event, this circuit is really useful great in protection schemes, blocking diodes, and power supply OR'ing.

The term is loose until you know what ideal means in electronics. Ideal is a pure definition, super is a description, the same as stupor is a description.

Yeah, I have a pretty good idea of what ideal means in a textbook, like many people. But that doesn't stop people from using it loosely. If you google ideal diode this circuit comes up and I've only ever seen it called an ideal diode circuit. Obv its far away from that but why change it up on people?