簡介： NSK_Crystal Units_Terms and DefinitionsCrystal Units:Terms and DefinitionsThe piezoelectric effects is defined that pressure applied on quartzcrystal generates voltage and voltage applied across a crystal quartzproduces mechanical vibration. The frequency of these vibration isdetermined by several factors:a) The physical dimensions of the piece of quartz crystal wafer.b) The plane or cut of the piece in relation to the crystalline axes of thequartz.c) The ambient temperature.d) The operating circuit.1.Equivalent CircuitAlthough the theoretical analysis of this piezoelectric effect is arelatively complex electro-mechanical function, it can be shown as a simpleequivalent circuit.| |[pic] |The equivalent crystal circuit is useful in explaining the electrical……
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