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The Wikipedia article on resonance defines resonance as:
This article states:
It seems to me that resonant circuits meet the definition of resonance and that the contrary statement in this article is incorrect, including its definition of what resonance really means. If nobody can reconcile this contradiction I am going to remove the statement. Rsduhamel ( talk) 12:21, 12 May 2011 (UTC)
I don't like to tread on anyones's toes, and this seems to me to be a rather pedantic point, but I have changed the wording concerning resonance to mean that resonance occurs when the circuit is driven. I am not happy with the definition of resonance as a tendency; to me it is an occurrence which either happens or does not. It happens when the circuit is driven at an appropriate frequency; this is consistent with the etymology of 'resonance' - to resound. Resonance is not an intrinsic quality of a circuit - it is a phenomenon - something that the circuit does; it resonates. In the theory of LCR circuits, a distinction is made between the natural oscillatory frequency (to which Spinningspark refers), and the resonant frequency at which the amplitude response is greatest when the circuit is driven. There is also the question of the frequency at which the terminal impedance is entirely real (resistive). In some LCR circuits all of these are at slightly different frequencies. I would like to suggest that the necessary distinction is made between natural oscillation and resonance. Spinningspark refers to it; I have added it to the text. G4oep ( talk) 10:47, 13 January 2015 (UTC)
Is it necessary to have the confusing term "second order" in the introduction? Is it really correct to call the circuit a "second order LC circuit"? It is a "second order circuit", because it has one inductance and one capacitance and is represented by a 2nd order differential equation. But it is never called "second order LC circuit". This is going to be confusing to general readers, they are going to ask "What then is a first order LC circuit?" I understand the reason it was added, to distinguish this circuit from LC circuits with more reactances. But I think that could be relegated to another section, or at least put at the end of the introduction, to avoid confusing readers. -- Chetvorno TALK 00:26, 10 October 2014 (UTC)
Between LC circuit being redirected from Tank circuit, and Amplifier being mostly in regard transistor amplifiers we seem to be missing an entire Tank circuit article dealing with non-transistor amplifiers. The Tank circuit was entirely the amplifier pre-transistor apart from various inductive amplification. At least include a full section under either the aforementioned and reference to either both. Thank-you KING ( talk) 07:36, 24 December 2015 (UTC)
Recent edit summary suggests that LC circuits don't go to low frequencies. It seems that LC filters in power supplies are rare these days, but not so rare in the vacuum tube days. So, yes, you can build and LC filter with electrolytic capacitor and iron core inductor, below 60Hz. Probably to 0.42Hz if you really want one. But yes, the common use is for radio receivers at RF. Gah4 ( talk) 23:25, 13 February 2023 (UTC)
It seems that I already have a section on order. As a recent undo notes, LC filters have even order. There are RC and RL filters, starting with first order. Or, as noted in the edit summary, it comes from the order of the differential equation. The not very many, and not necessarily WP:RS that I searched, all say LC starts at 2. Gah4 ( talk) 05:15, 5 April 2023 (UTC)
The article needs more pictures of tuned circuits. High Q tank circuits in radio transmitters should be easy for general readers to understand because they usually consist of a coil suspended in air and a variable capacitor with exposed plates. I added a photo of a tank circuit from a transmitter, but Commons had almost none so I had to use a black & white one from a 1938 book. I'd like to request any radio amateurs out there that would like to help, open the case of your transmitter (and/or antenna tuner) and see if you can get a good shot of the tank circuit. Also military radio equipment or transmitters of AM radio stations would be good sources. If you are unfamiliar with the process of uploading a photo to Commons I can help. Thanks! -- Chetvorno TALK 20:49, 20 June 2023 (UTC)
Hi, I followed this very well written article completely and found the same formulas... EXCEPT for the very last one for the case of a sinusoidal function as input. After careful examination, I perform the same transform and arrive to the conclusion that certain factors in front of the sinusoidal functions in the time domain expression namely 1/omega0 and 1/omegaf are there only if we replace the nominator of the summands 1 by omega_0/omega_0 and omega_f/omega_f in order to be able to perform the Laplace transform. Is that correct ?
Isolating the constant and adjusting for lack of numerator:
Performing the reverse Laplace transform on each summands:
Furthermore, there seems to be a step to simplify the expression of v(t) that has not be taken as b/b = 1 and not b should appear in the last formula in the time domain. Instead of this:
Should we not have the following ?
Cordially yours, Temnothorax ( talk) 23:22, 24 October 2023 (UTC)
This is the
talk page for discussing improvements to the
LC circuit article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives: Index, 1Auto-archiving period: 730.5 days |
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
Archives ( Index) |
This page is archived by
ClueBot III.
|
The Wikipedia article on resonance defines resonance as:
This article states:
It seems to me that resonant circuits meet the definition of resonance and that the contrary statement in this article is incorrect, including its definition of what resonance really means. If nobody can reconcile this contradiction I am going to remove the statement. Rsduhamel ( talk) 12:21, 12 May 2011 (UTC)
I don't like to tread on anyones's toes, and this seems to me to be a rather pedantic point, but I have changed the wording concerning resonance to mean that resonance occurs when the circuit is driven. I am not happy with the definition of resonance as a tendency; to me it is an occurrence which either happens or does not. It happens when the circuit is driven at an appropriate frequency; this is consistent with the etymology of 'resonance' - to resound. Resonance is not an intrinsic quality of a circuit - it is a phenomenon - something that the circuit does; it resonates. In the theory of LCR circuits, a distinction is made between the natural oscillatory frequency (to which Spinningspark refers), and the resonant frequency at which the amplitude response is greatest when the circuit is driven. There is also the question of the frequency at which the terminal impedance is entirely real (resistive). In some LCR circuits all of these are at slightly different frequencies. I would like to suggest that the necessary distinction is made between natural oscillation and resonance. Spinningspark refers to it; I have added it to the text. G4oep ( talk) 10:47, 13 January 2015 (UTC)
Is it necessary to have the confusing term "second order" in the introduction? Is it really correct to call the circuit a "second order LC circuit"? It is a "second order circuit", because it has one inductance and one capacitance and is represented by a 2nd order differential equation. But it is never called "second order LC circuit". This is going to be confusing to general readers, they are going to ask "What then is a first order LC circuit?" I understand the reason it was added, to distinguish this circuit from LC circuits with more reactances. But I think that could be relegated to another section, or at least put at the end of the introduction, to avoid confusing readers. -- Chetvorno TALK 00:26, 10 October 2014 (UTC)
Between LC circuit being redirected from Tank circuit, and Amplifier being mostly in regard transistor amplifiers we seem to be missing an entire Tank circuit article dealing with non-transistor amplifiers. The Tank circuit was entirely the amplifier pre-transistor apart from various inductive amplification. At least include a full section under either the aforementioned and reference to either both. Thank-you KING ( talk) 07:36, 24 December 2015 (UTC)
Recent edit summary suggests that LC circuits don't go to low frequencies. It seems that LC filters in power supplies are rare these days, but not so rare in the vacuum tube days. So, yes, you can build and LC filter with electrolytic capacitor and iron core inductor, below 60Hz. Probably to 0.42Hz if you really want one. But yes, the common use is for radio receivers at RF. Gah4 ( talk) 23:25, 13 February 2023 (UTC)
It seems that I already have a section on order. As a recent undo notes, LC filters have even order. There are RC and RL filters, starting with first order. Or, as noted in the edit summary, it comes from the order of the differential equation. The not very many, and not necessarily WP:RS that I searched, all say LC starts at 2. Gah4 ( talk) 05:15, 5 April 2023 (UTC)
The article needs more pictures of tuned circuits. High Q tank circuits in radio transmitters should be easy for general readers to understand because they usually consist of a coil suspended in air and a variable capacitor with exposed plates. I added a photo of a tank circuit from a transmitter, but Commons had almost none so I had to use a black & white one from a 1938 book. I'd like to request any radio amateurs out there that would like to help, open the case of your transmitter (and/or antenna tuner) and see if you can get a good shot of the tank circuit. Also military radio equipment or transmitters of AM radio stations would be good sources. If you are unfamiliar with the process of uploading a photo to Commons I can help. Thanks! -- Chetvorno TALK 20:49, 20 June 2023 (UTC)
Hi, I followed this very well written article completely and found the same formulas... EXCEPT for the very last one for the case of a sinusoidal function as input. After careful examination, I perform the same transform and arrive to the conclusion that certain factors in front of the sinusoidal functions in the time domain expression namely 1/omega0 and 1/omegaf are there only if we replace the nominator of the summands 1 by omega_0/omega_0 and omega_f/omega_f in order to be able to perform the Laplace transform. Is that correct ?
Isolating the constant and adjusting for lack of numerator:
Performing the reverse Laplace transform on each summands:
Furthermore, there seems to be a step to simplify the expression of v(t) that has not be taken as b/b = 1 and not b should appear in the last formula in the time domain. Instead of this:
Should we not have the following ?
Cordially yours, Temnothorax ( talk) 23:22, 24 October 2023 (UTC)