NSK_Crystal Units_Terms and Definitions Crystal Units:Terms and Definitions The piezoelectric effects is defined that pressure applied on quartz crystal generates voltage and voltage applied across a crystal quartz produces mechanical vibration. The frequency of these vibration is determined 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 the quartz. c) The ambient temperature. d) The operating circuit. 1.Equivalent Circuit Although the theoretical analysis of this piezoelectric effect is a relatively complex electro-mechanical function, it can be shown as a simple equivalent circuit. | |[pic] | The equivalent crystal circuit is useful in explaining the electrical ……