Patent ID: 7965019

Claim:
A device comprising: at least one piezoacoustic resonator element ( 21 - 29 ) with at least one piezoelectric layer ( 21 a - 29 a ) and two electrodes ( 21 b - 29 b , 21 c - 29 c ) applied to the piezoelectric layer ( 21 a - 29 a ), the piezoacoustic resonator element ( 21 - 29 ) being configured in such a manner that when a voltage is applied to the piezoelectric layer ( 21 a - 29 a ) by means of the electrodes ( 21 b - 29 b , 21 c - 29 c ), a bulk wave of the piezoelectric layer ( 21 a - 29 a ) is induced with a resonant frequency; a heating device with a heating element ( 211 - 219 ), integrated into the piezoacoustic resonator element ( 21 - 29 ), for controlling the working temperature of the device, the device is constructed in such a way that the heating element ( 211 - 219 ) of the heating device can also be operated as a temperature measuring element; and an evaluation device for determining the temperature from the resistance value of the temperature measuring element and which is constructed so as to be integrated into the carrier substrate, the evaluation device comprises a storage device for storing a characteristic curve that describes the temperature dependency of the resistance and a read-out device for reading out a temperature value as a function of the detected resistance value of the heating element ( 211 - 219 ).