Crystal resonator with multiple segmented lateral-field excitati

Details Crystal resonator with multiple segmented lateral-field excitati Crystal resonator with multiple segmented lateral-field excitati

1994-04-19

1995-05-09

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310318, 310361, H01L 4108

Patent

active

054143225

ABSTRACT:
A crystal resonator including at least three, typically four linear electe segments, formed on one of the major faces of piezoelectric resonator blank and providing at least two gaps which are selectively excited by RF voltages of predetermined magnitude and phase for generating a resultant lateral-field oriented at an arbitrary angle .PSI. with respect to the coordinate axes of the crystal plate for varying the lateral-field piezoelectric coupling k which is a parameter indicative of the degree to which an electrical energy is converted to mechanical energy in the resonator. By adjusting the magnitude and phases of the excitation voltages, applied to the electrode segments, the lateral-field direction becomes steerable so as to alter the electrical characteristics of the resonator including the lateral-field excitation antiresonance frequency.

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