Talk:Circulator

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Hi, I did a little editing on this page. The diagram while pretty does not diagram a typical use of a circulator AT ALL.

Also the bizness about "Active circulators" is just plain bogus. You can subtract out a signal with an op-amp but that has absolutely nothing to do with ferrite microwave circulators. Nothing.

Hi, I'd more-or-less concur with Special:Contributions/216.70.45.162 (time to get a user-name?).

• In the diagram there is a switch, and the circulator is just used as an isolator, whereas in the text, it says that the circulator is used in place of the switch.
• The term "active circulator" gets a paltry 817 hits on Google; it probably deserves at most a passing mention here. The bit about frequency-division and time-division multiplexing is not relevant (and is confusing).

Some other observations;

• The first sentence A circulator is a passive electronic component with three or more ports in which the ports can be accessed in such an order that when a signal is fed into any port it is transferred to the next port (only), the first port being counted as following the last in numeric order. is nicked almost verbatim from the IEEE Standard Dictionary of Electrical and Electronics Terms.
• There should be some mention of non-reciprocity.
• A scattering matrix might be worth a thousand words.

--catslash 11:32, 12 September 2007 (UTC)

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Yes, please, let's either drop that picture or get a more appropriate one. The pic shows the exact opposite of the most common usage, it's using a physical switch instead of a circulator.

Also all the bizness about "active circulators" is misleading, there is no such thing, strictly speaking.

An Hac 14:06, 20 September 2007 (UTC)