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Class Information
Number: 310/315
Name: Electrical generator or motor structure > Non-dynamoelectric > Piezoelectric elements and devices > Electrical systems > Temperature compensation circuits
Description: Subject matter having circuit elements associated with the piezoelectric element which compensate for changes in its piezoelectric properties upon changes in temperature, e.g., turnover point, impedance, frequency, resistance, etc.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8686617 Circuit for compensating influence of temperature on a resonator Apr. 1, 2014
8680931 Periodic signal generators having microelectromechanical resonators therein that support surface wave and bulk acoustic wave modes of operation with different temperature coefficients of frequ Mar. 25, 2014
8669825 Temperature-compensated oscillator and electronic device Mar. 11, 2014
8581533 Motor driver and method of controlling the same Nov. 12, 2013
8569927 Piezoelectric actuator unit and liquid transporting apparatus Oct. 29, 2013
8555724 Ultrasonic sensor Oct. 15, 2013
8519599 Piezoelectric actuator unit and liquid transporting apparatus Aug. 27, 2013
8482182 Driving apparatus, optical apparatus, and driving signal control circuit Jul. 9, 2013
8469005 Piezoelectric fuel injector having a temperature compensating unit Jun. 25, 2013
8446226 Oven controlled crystal oscillator May. 21, 2013
8368474 Surface acoustic wave oscillator Feb. 5, 2013
8174331 Temperature compensated crystal oscillator, printed-circuit board, and electronic device May. 8, 2012
8132594 Hydraulic valve actuated by piezoelectric effect Mar. 13, 2012
8120438 Temperature compensated crystal oscillator Feb. 21, 2012
8111109 Temperature compensated piezoelectric oscillator Feb. 7, 2012
8013494 Vibration actuator driving device, lens barrel, camera, method of manufacturing electromechanical conversion element, method of manufacturing vibration actuator, and method of driving vibratio Sep. 6, 2011
8008839 System and method of providing a thermally stabilized fixed frequency piezoelectric optical modulator Aug. 30, 2011
7969063 Driver Jun. 28, 2011
7956517 MEMS structure having a stress inverter temperature-compensated resonator member Jun. 7, 2011
7898146 Drive unit Mar. 1, 2011
7821346 Ovenized oscillator Oct. 26, 2010
7762236 Piezoelectric fuel injector having a temperature compensating unit Jul. 27, 2010
7732980 Electromechanical conversion element, vibration actuator, vibration actuator driving device, lens barrel and camera Jun. 8, 2010
7717132 Hydraulic valve actuated by piezoelectric effect May. 18, 2010
7701115 Drive unit Apr. 20, 2010
7607352 Ultrasonic sensor transmitting and receiving ultrasonic frequencies adjusted according to temperature Oct. 27, 2009
7589599 Heating system for a double-ovenized oscillator on a single printed circuit board Sep. 15, 2009
7573179 Driving method of liquid drop ejecting head and liquid drop ejecting apparatus Aug. 11, 2009
7545228 Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators Jun. 9, 2009
7514853 MEMS structure having a stress inverter temperature-compensated resonating member Apr. 7, 2009
7444209 Miniature cooling device Oct. 28, 2008
7378781 Acoustic wave resonator with integrated temperature control for oscillator purposes May. 27, 2008
7271520 Piezo actuator driving circuit Sep. 18, 2007
7215214 Resonator and amplifying oscillator circuit having a high resolution skew-compensated frequency synthesizer integrated on a single substrate May. 8, 2007
7211926 Temperature compensated oscillator including MEMS resonator for frequency control May. 1, 2007
7166978 Motor temperature sensor system and method to determine motor performance Jan. 23, 2007
7154351 Approximate n-th order function generating device and temperature compensation crystal oscillation circuit Dec. 26, 2006
7093775 Fragrance-dispensing shower head Aug. 22, 2006
7034436 Device to control a piezoelectric actuator Apr. 25, 2006
6885131 Method for controlling a piezoelectric actuator which is used to displace an element Apr. 26, 2005
6847271 Component having an acoustically active material for tuning during operation Jan. 25, 2005
6794795 Method and apparatus for exciting a piezoelectric material Sep. 21, 2004
6781472 Pseudo-cubic function generator circuit Aug. 24, 2004
6756880 Reader and response control system for discrimination between multiple surface acoustic wave identification tags and method of operation thereof Jun. 29, 2004
6727635 Driving device Apr. 27, 2004
6717328 Piezoelectric resonator and FM detection circuit incorporating the same Apr. 6, 2004
6707347 Crystal oscillator that utilizes the power transistor of an output amplifier to heat the crystal resonator Mar. 16, 2004
6706977 Self-monitoring controller for quartz crystal microbalance sensors Mar. 16, 2004
6597083 Method and apparatus for compensating for temperature induced deformation of a piezoelectric device Jul. 22, 2003
6501340 Oscillator with frequency stabilizing circuit and method of constructing same Dec. 31, 2002

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