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Class Information
Number: 331/163
Name: Oscillators > Electromechanical resonator > Crystal > Crystal having three or more electrodes in circuit
Description: Subject matter wherein the crystal has three or more electrodes for establishing two or more separate resonant paths through the crystal.

Patents under this class:

Patent Number Title Of Patent Date Issued
8305154 Parametrically driven quartz UHF oscillator Nov. 6, 2012
7893784 Composite resonance circuit and oscillation circuit using the circuit Feb. 22, 2011
7595701 Crystal oscillator Sep. 29, 2009
7570126 Tuning-fork type piezoelectric vibrating piece and oscillator Aug. 4, 2009
7362193 Oscillator and an integrated circuit Apr. 22, 2008
7123111 Micro-electromechanical systems Oct. 17, 2006
5787004 Method for computer-assisted iterative determination of the transient response of a quartz resonator circuit Jul. 28, 1998
5561400 Oscillator unit Oct. 1, 1996
5420548 Quartz crystal oscillator angular velocity detector circuits May. 30, 1995
5361045 High-stability resonators of solid elastic material and oscillators using them Nov. 1, 1994
5319324 Method of direct bonding of crystals and crystal devices Jun. 7, 1994
5200714 Crystal oscillator with quartz vibrator having temperature detecting faculty, quartz vibrator for use therein, and method of measuring temperature using quartz vibrator Apr. 6, 1993
5149197 Piezo electric resonator temperature sensor Sep. 22, 1992
5132643 Crystal resonator with plural electrodes for use in a crystal oscillating device of a temperature compensation type Jul. 21, 1992
4628285 3-terminal oscillating element and oscillator employing the same Dec. 9, 1986
4481488 Trapped energy resonator for oscillator and multiple resonator applications Nov. 6, 1984
4376919 Circuitry for switching effective electrode area on a crystal in a crystal oscillator to vary the oscillation frequency Mar. 15, 1983
4336510 Oscillator with a feedback circuit employing a pre-polarized ceramic piezoelectric oscillating unit Jun. 22, 1982
4178566 Quartz crystal tuning fork vibrator for a crystal oscillator Dec. 11, 1979
4144747 Simultaneously resonated, multi-mode crystal force transducer Mar. 20, 1979
4109456 Ceramic capacitor Aug. 29, 1978
4044317 Crystal controlled square wave oscillator Aug. 23, 1977
4028640 Piezo-electric tuning fork oscillation circuit Jun. 7, 1977

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