Excitation of Piezoelectric Plates by Use of a Parallel Field with Particular Reference to Thickness Modes of Quartz

The parallel field excitation of piezoelectric plates, particularly of plates vibrating in thickness modes, and their resulting piezoelectric stress constants in general and of various quartz cuts are considered. Quartz AT-cut crystals excited by a parallel field are of practical interest for high precision frequency control and the data of the equivalent electric circuit of a 1000-kc AT quartz oscillator excited by a parallel field are given.