Recent content by LvW

Assuming that you are speaking about a series resonant circuit (why didn`t you mention this?), Your diagrams look pretty good.

DaveE, with all respect - do you agree with me that the last sentence above contains just an assertion without any explanation? If that is your own definition of the term “resonance” - OK, no problem. But I suspect that the questioner (post#1) prefers an answer based on a generally accepted...

Yes - in many cases, definitions consists just of words. No - I don`t think so. In the definition according to #19 the circuit at resonance is pure resistive (no phase shift between input voltage and input current resp. output and input voltages). But even lowpass functions with Bessel...

What about the explanations I have mentioned in my posts #19 and #30 ?

I must admit that - up to now - I have never heard about such a definition. Is there any reference?

General statement: I have checked several books and other knowledge sources on the subject of “resonance” and - without exception - the resonance case was only defined and explained for RLC circuits. In one of these sources it even says: "In electrical resonance, the frequency of the source is...

OK - I agree that the term of "resonance" very often is "used in a sloppy fashion". But does that prevent us from looking for and using an exact definition? Because your definition "focuses on complex poles and zeros only" (pole frequencies of a filter and “high-Q” circuits) - where is the limit...

Two links: 1.) https://testbook.com/electrical-engineering/resonance "Electrical Resonance means in a circuit when the inductive reactance (XL) and capacitive reactance (XC) are equal in magnitude but opposite in phase,resulting in a purely resistive impedance at a particular frequency. " 2.)...

No surprise - F2 has a 1st-order lowpass characteristic (real at w=0 only). Of course, there are circuits and/or functions which cannot show a resonance effect.

Yes - of course. Another example: Can you define the gain (or damping) of a circuit without defing input and output? Do you see any alternative method for defing the resonant case?

Thank you for your contribution to the discussion. Let me explain my arguments concerning Re-Feedback. * Any unwanted increase in Ic - for example, caused by temperature increase - will increase the voltage drop across Re and, hence, the emitter voltage Ve. As a consequence, the base-emitter...

When we speak about a circuit and a certain signal which is injected into the circuit with a certain frequency we do this using a certain input node. This input node is - of course in conjunction with a specified output node - used for defining a transfer function. Applying this transfer...

You are mentioning "multiple possible inputs". Is this really the "normal" case? However - where is the problem? When you have two possible inputs you can define two different input admittances and apply the definition on both. Why do you mention zeros and poles? When you are interested in the...

I think, we should not mix the three termes "pole frequency", "natural frequency" and "resonant frequency". I some simple cases, all three can be identical - however, for my opinion, we have a clear defintion for the resonance case of a frequency dependent circuit: The frequency fo with zero...

Hi Tom - thank you for your reply. However, I like to repeat that the BJT is (like the FET) a transconductance device. So I have not "confused" a BJT with a FET. I am aware that there are many (unqualified) contributions (internet articles and even in some books) which state - without any...