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Class Information
Number: 331/158
Name: Oscillators > Electromechanical resonator > Crystal
Description: Subject matter wherein the frequency determining electrically driven material body is a crystal exhibiting the piezoelectric effect. Examples of such crystals are quartz, Rochelle salt, tourmaline or other crystal classes which do not possess a center of symmetry and wherein deformation of the crystal is proportional to the first power of the imposed electric field, the direction of deformation referring upon reversal of the field.










Sub-classes under this class:

Class Number Class Name Patents
331/164 Anode or cathode to grid crystal circuit 0
331/163 Crystal having three or more electrodes in circuit 23
331/162 Plural crystals in circuit 46
331/159 Plural tube 19
331/161 With crystal substitution 18
331/160 With means to limit crystal current or voltage 72


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Patent Number Title Of Patent Date Issued
7256659 Temperature compensated crystal oscillator and method of manufacturing same Aug. 14, 2007
7253694 Temperature compensated oven controlled crystal oscillator Aug. 7, 2007
7248127 Crystal oscillator Jul. 24, 2007
7242258 Temperature-compensated crystal oscillator Jul. 10, 2007
7239211 Temperature-compensated crystal oscillator Jul. 3, 2007
7239857 Method and apparatus for compensating an oscillator in a location-enabled wireless device Jul. 3, 2007
7236059 Apparatus, system, and method for oscillator network with multiple parallel oscillator circuits Jun. 26, 2007
7236062 Low phase noise crystal oscillator with supply noise filtering Jun. 26, 2007
7230502 Emitter coupled logic oscillator circuit Jun. 12, 2007
7227421 Crystal oscillator circuit Jun. 5, 2007
7221233 Nonvolatile programmable crystal oscillator circuit May. 22, 2007
7212075 Downhole clock having temperature compensation May. 1, 2007
7205856 Piezoelectric oscillator Apr. 17, 2007
7205858 Temperature compensated piezoelectric oscillator and electronic apparatus comprising it Apr. 17, 2007
7193483 Blocking a leakage current Mar. 20, 2007
7190235 Surface mounted crystal unit Mar. 13, 2007
7190238 Surface mounting crystal oscillator Mar. 13, 2007
7187245 Amplitude control for crystal oscillator Mar. 6, 2007
7183868 Triple inverter pierce oscillator circuit suitable for CMOS Feb. 27, 2007
7184798 Power conservation system and method Feb. 27, 2007
7180382 Wide band voltage controlled crystal oscillator Feb. 20, 2007
7173499 High-stability piezoelectric oscillator Feb. 6, 2007
7170357 Crystal oscillator with wide tuning range Jan. 30, 2007
7161443 Temperature compensated crystal oscillator Jan. 9, 2007
7157983 Cut of piezoelectric oscillator, piezoelectric oscillator, and piezoelectric device Jan. 2, 2007
7157981 Surface-mounted oscillator Jan. 2, 2007
7154350 Semiconductor device Dec. 26, 2006
7154351 Approximate n-th order function generating device and temperature compensation crystal oscillation circuit Dec. 26, 2006
7155176 System for synchronizing a portable transceiver to a network Dec. 26, 2006
7148763 Integrated circuit including processor and crystal oscillator emulator Dec. 12, 2006
7148761 GPS receiver devices and compensation methods therefor Dec. 12, 2006
7142065 Crystal oscillator device and electronic apparatus using the same Nov. 28, 2006
7138881 Fast wake-up crystal oscillating circuit Nov. 21, 2006
7135810 Surface mount crystal oscillator Nov. 14, 2006
7135938 Surface-mount crystal oscillator Nov. 14, 2006
7135939 Semiconductor device including an external oscillation circuit Nov. 14, 2006
7132898 Phase detector for reducing noise Nov. 7, 2006
7129799 Piezoelectric vibration element and piezoelectric filter Oct. 31, 2006
7123113 Regulated, symmetrical crystal oscillator circuit and method Oct. 17, 2006
7123109 Crystal oscillator with variable bias generator and variable loop filter Oct. 17, 2006
7123107 Piezoelectric oscillator, manufacturing method thereof, and electronic device Oct. 17, 2006
7123108 Surface mount crystal oscillator Oct. 17, 2006
RE39329 Oscillation circuit, electronic circuit using the same, and semiconductor device, electronic equipment, and timepiece using the same Oct. 10, 2006
7116179 Crystal oscillator Oct. 3, 2006
7116182 Method and system for downhole clock having compensation Oct. 3, 2006
7113051 Frequency characterization of quartz crystals Sep. 26, 2006
7109810 Oscillator with tunable capacitor Sep. 19, 2006
7109813 Fast starting on-chip crystal oscillation circuit Sep. 19, 2006
7109814 Piezoelectric oscillator Sep. 19, 2006
7106143 Method for achieving highly reproducible acceleration insensitive quartz crystal oscillators Sep. 12, 2006

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20










 
 
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