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I think this article is wrong, a 3dB drop in voltage doesn't correspond to half power. A 3dB drop in power is half power. But I'm not changing the article because I don't consider myself an expert in this area. It already looks like someone came along to try to "clarify" the matter and ended up changing what was being said.
Also, a search of the net for "half power point" finds many references regarding filters and none (that I noticed in the first few pages of search results) regarding amplifiers. Maybe that's just how the search results happened to come out - I realize that this term could be used in describing the bandwidth of an amplifier, but it seems to me that it isn't the normal usage. —The preceding unsigned comment was added by 24.128.68.185 ( talk) 03:24, 6 April 2007 (UTC).
The article is correct. Decibels are calculated differently for voltage and power. See the article on SNR. 152.3.154.115 ( talk) 19:39, 5 June 2008 (UTC)
This article should probably just be merged into the cutoff point article. — Preceding unsigned comment added by 164.107.168.44 ( talk) 19:38, 11 October 2012 (UTC)
I think the confusion comes from the word "level" being applied to power, which is confusing because it could also be understood to apply to amplitude. Clenchedteeth ( talk) —Preceding undated comment added 10:16, 30 January 2019 (UTC)
'A high pass amplifier stage will have only the lower half power point.'
There's no such thing as an amplifier with infinite bandwidth, so the above cant possibly be true 82.31.66.207 ( talk) 16:42, 15 September 2013 (UTC)
After numerous edits, this article would still serve better as an example of incompetent communication than as an engineering reference. If not deleted, it needs a complete re-write. - Mike Shepherd ( talk) 20:33, 16 January 2014 (UTC)
Shouldn't the definition be more general so that it doesn't just refer to the half power point in the frequency domain? The half power point could be of interest e.g. as a function of angle for a directional antenna. Clenchedteeth ( talk) —Preceding undated comment added 11:27, 30 January 2019 (UTC)
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
|
I think this article is wrong, a 3dB drop in voltage doesn't correspond to half power. A 3dB drop in power is half power. But I'm not changing the article because I don't consider myself an expert in this area. It already looks like someone came along to try to "clarify" the matter and ended up changing what was being said.
Also, a search of the net for "half power point" finds many references regarding filters and none (that I noticed in the first few pages of search results) regarding amplifiers. Maybe that's just how the search results happened to come out - I realize that this term could be used in describing the bandwidth of an amplifier, but it seems to me that it isn't the normal usage. —The preceding unsigned comment was added by 24.128.68.185 ( talk) 03:24, 6 April 2007 (UTC).
The article is correct. Decibels are calculated differently for voltage and power. See the article on SNR. 152.3.154.115 ( talk) 19:39, 5 June 2008 (UTC)
This article should probably just be merged into the cutoff point article. — Preceding unsigned comment added by 164.107.168.44 ( talk) 19:38, 11 October 2012 (UTC)
I think the confusion comes from the word "level" being applied to power, which is confusing because it could also be understood to apply to amplitude. Clenchedteeth ( talk) —Preceding undated comment added 10:16, 30 January 2019 (UTC)
'A high pass amplifier stage will have only the lower half power point.'
There's no such thing as an amplifier with infinite bandwidth, so the above cant possibly be true 82.31.66.207 ( talk) 16:42, 15 September 2013 (UTC)
After numerous edits, this article would still serve better as an example of incompetent communication than as an engineering reference. If not deleted, it needs a complete re-write. - Mike Shepherd ( talk) 20:33, 16 January 2014 (UTC)
Shouldn't the definition be more general so that it doesn't just refer to the half power point in the frequency domain? The half power point could be of interest e.g. as a function of angle for a directional antenna. Clenchedteeth ( talk) —Preceding undated comment added 11:27, 30 January 2019 (UTC)