A DIFFERENTIAL TEMPERATURE MEASURING DEVICE COMPRISING SURFACE TRANSVERSE WAVE RESONATORS

摘要

It is proposed a differential temperature sensor (100) comprising: - a first piezoelectric substrate (10) made of a single crystal of lanthanum gallium silicate on which is arranged a first surface transverse wave resonator (11) having a first predetermined resonance configuration, - a second piezoelectric substrate (20) made of a single crystal of lanthanum gallium silicate on which is arranged a second surface transverse wave resonator (21) having a second predetermined resonance configuration identical to the first predetermined resonance configuration, the first piezoelectric substrate having a double-rotation cut which is different from the double-rotation cut angle of said second piezoelectric substrate.