The Current Mirror

A current mirror is a current source that copies or "mirrors" a current programmed elsewhere in the circuit. In it's simplest form, it consists of a DC voltage source, a resistor, a diode, and bipolar junction transistor. There are practical limits to this configuration, and we discuss those limitations and how to enhance circuit performance.
References: Operational Amplifiers and Linear Integrated Circuits: Theory and Application; Chapter 1 section 6.
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[@rockpadstudios]

I never realized it was an early voltage issue. We forget it took decades to reach this point and we learn it in a 1 hour class lecture. This stuff is so cool.

[@HardikJain_YT]

Gr8 wilson mirror explanation ; The way you shifted the circuit from diode based to improved wilson mirror is just fab improving accuracy every time

[@andymouse]

Solid gold tutorial, this should be required reading...cheers !

[@hardrocklobsterroll395]

Great video thank you

[@cbc7599]

This makes sense, this way of explanation! Working my way trough the videos! Meanwhile, I installed TINA-TI. I wanted to know what the mirror does when left and right side have different supply voltages, instead of both 10V. I gave right side it's own supply voltage and played around, from 5V upto 25V: still a nice current mirror! Kind regards.

[@cbc7599]

Later I also did put a load resistor at the right side above the both rightside transistors: still a nice current mirror!

[@ElectronicswithProfessorFiore]

@@cbc7599 Yes, it's wonderful being able to quickly experiment with circuits in the simulator. "What if" experiments are much quicker than trying to do it with physical circuits in lab.

[@ElectricNimPedalsPhilippines]

Thank you, Sensei! I learned a lot! Cheers from Manila Philippines

[@LousyPainter]

Great video! Thanks.

[@mmh1922]

Well done!

[@AmanSingh-gi6wt]

Thanks

[@simonyoungglostog]

Thank you. I was uncomfortable with the asymmetry of the Wilson Mirro but feel better with the last version; very elegant. How does it compare to the 'Ring of Two'? I've used it a couple of times in a circuit I designed but I'm not certain as to how it works (I just know it does).

[@ElectronicswithProfessorFiore]

I am not familiar with the phrase. I'll have to look it up.

[@sassi7190]

which simulator sw you use?

[@ElectronicswithProfessorFiore]

TINA-TI, a free version of TINA which is available from Texas Instruments.