Temperature stable double resonator for use as e.g. sensor, has resonators including temperature coefficients of resonance or anti-resonance frequency whose deflection according to angle forms converter direction with rotation axis

摘要

#CMT# #/CMT# The resonator has two individual surface wave resonators (2, 3) arranged on a piezoelectric crystal substrate (1) e.g. section of a crystal, including an inter-digital converter (23). The directions perpendicular to a prong direction of the converter are different from each other. The resonators have temperature coefficients of order one resonance or anti-resonance frequency whose deflection according to angle forms a converter direction with a rotation axis of the substrate. The coefficient of the resonance or anti-resonance frequency exhibits a predetermined reference temperature. #CMT#USE : #/CMT# Temperature stable double resonator for use as a band pass filter, a component in an oscillator or a sensor. #CMT#ADVANTAGE : #/CMT# The resonators have temperature coefficients of order one resonance frequency or anti-resonance frequency whose deflection according to angle forms a converter direction with a rotation axis of the substrate so as to change the temperature coefficients of the resonance frequency or anti-resonance frequency that is less sensitive against variations of the direction perpendicular to the prongs of the converter. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a circuit diagram of a temperature stable double resonator with two individual surface wave resonators.'(Drawing includes a non-English text)' 1 : Piezoelectric crystal substrate 2, 3 : Surface wave resonators 23 : Inter-digital converter 24 : Apertures 25 : Connections.