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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: What Unclestu said (me too) plus posted by geoffkait on April 8, 2011 at 17:52:32:
As bartc said, piezoelecricity is a two-way street: a mechanical deformation can produce an electric current or an electric field can create a mechanical deformation. In a radio crystal, an electric current is applied to a crystal causing the crystal to deform. The deformation of the crystal, in turn, creates an electrical charge which in turn creates more deformations. Some of the deformations and elecrical fields cancel each other out; others reinforce eachother. This leads to the crystal vibrating at a single resonant frequency. With the oddly shaped crystals that we are dealing with, the interactions are probably more complex causing RFI absorption at multiple frequencies. It seems likely that the "doping" caused by the various chemical impurities modifies this electro-mechanical system too.
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Follow Ups
- So here's what I've read. - Paul_A 04:53:20 04/09/11 (3)
- RE: So here's what I've read. - geoffkait 07:47:30 04/09/11 (2)
- I thought that you were going to enter into the discussion... - Paul_A 08:35:35 04/09/11 (1)
- You're kidding, right? - geoffkait 08:54:59 04/09/11 (0)
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