Once we made various virtual “elements” as follows:

* ammeter with zero internal resistance

https://www.researchgate.net/post/How_do_we_improve_the_real_ammeter_How_do_we_create_an_almost_ideal_ammeter_What_does_the_op-amp_really_do_in_the_circuit_of_an_op-amp_ammeter2

* “resistor” with zero resistance

https://www.researchgate.net/post/Is_there_any_connection_between_the_humble_resistor_and_the_transimpedance_amplifier_What_does_the_op-amp_really_do_in_this_electronic_circuit?

* “capacitor” with infinite capacitance (as regards the time behavior)

https://www.researchgate.net/post/Can_we_virtually_increase_the_capacitance_up_to_infinity_How_do_we_make_such_virtual_capacitors_Have_they_the_same_properties_as_real_capacitors?

* “diode” with zero voltage threshold, etc.,

https://www.researchgate.net/post/Can_we_virtually_decrease_the_forward_voltage_drop_across_a_diode_up_to_zero_How_do_we_make_such_virtual_ideal_diodes_with_zero_voltage_threshold?

and we guess that maybe, we can make many other virtual elements... we begin realizing that all they are based on the same general idea – “voltage compensation”

http://en.wikibooks.org/wiki/Circuit_Idea/Voltage_Compensation

The idea is extremely simple and intuitive and although it is realized by Miller in electronics

http://en.wikipedia.org/wiki/Talk:Miller_effect#How_to_modify_impedance

http://en.wikipedia.org/wiki/Miller_theorem

we can see it all around us... As for me, I realized this great circuit idea in the early 90's

http://en.wikipedia.org/wiki/Talk:Miller_theorem

https://www.researchgate.net/publication/254864969_How_I_Revealed_the_Secret_of_Parallel_Negative_Feedback_Circuits_(a_circuit_story)

It is wonderful to see the same common idea behind many seemingly different circuit solutions, “to see the forest for the trees”! And it is so funny to see how others explore and remember hundreds of particular circuits but you – only one general... since for you they all look like the same... because you know the general idea on which all they are built... you have the key...

Well, if it is such a great idea, let us express it in one sentence: “We can modify the IV properties of elements by adding an additional proportional voltage in series to the elements.”

I have implemented this concept in a more attractive manner in the animated Flash movie below:

http://www.circuit-fantasia.com/collections/tools/pnfb-builder.html

That is all! Cyril

Data How I Revealed the Secret of Parallel Negative Feedback Circ...

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