Abstract: Multiple degenerately-doped silicon layers are implemented within resonant structures to control multiple orders of temperature coefficients of frequency.

Abstract: A resonator is provided that includes a vibration part and a mass addition portion. The vibration part includes a piezoelectric film, an upper electrode, and a lower electrode. The upper electrode and the lower electrode are disposed on opposite sides with the piezoelectric film therebetween. The amount of displacement of the vibration part is greater in a region corresponding to at least part of the mass addition portion than in any other region. The mass addition portion has an inclined surface that slopes in such a manner that the mass addition portion has end regions and a central region thinner than at least one of the end regions when the vibration part is viewed in a plan view.

Abstract: A crystal quartz element includes a main face provided with a plurality of polarity inverted regions and a polarity non-inverted region, the plurality of polarity inverted regions are spaced apart from each other via the polarity non-inverted region, and the main face is a plane face. A method for manufacturing a crystal quartz element includes: preparing a crystal quartz body including a first main face which is a plane face, and a first pressing jig including a first pressing face on which a plurality of first projections are provided; and forming a plurality of polarity inverted regions corresponding to the plurality of first projections in the crystal quartz body by heating and pressing the first main face by the first pressing face.

Abstract: With respect to a phase locked loop (PLL) circuit that receives a first reference clock and generates an output clock, the PLL circuit includes a delay circuit that delays the first reference clock to generate a second reference clock, a feedback circuit that generates a control signal based on a phase difference between the second reference clock and a feedback clock, an oscillator that oscillates at a frequency determined based on the control signal to generate the output clock, and a divider that divides the output clock in the on state. The PLL circuit switches between a first mode and a second mode, the feedback clock in the first mode is a signal obtained by retiming an output of the divider with the output clock, and the feedback clock in the second mode is a signal obtained by retiming the first reference clock with the output clock.

Abstract: An oscillator includes a first resonator element, a first package that accommodates the first resonator element, a relay substrate on which the first package is mounted, a heater element that is attached to the first package or the relay substrate, a second package that accommodates the first package, and a heat insulating member that is provided at least between the second package and the relay substrate or between the relay substrate and the first package.

Abstract: A crystal oscillator includes an oscillating substrate, a hollow frame, a first electrode, and a second electrode. The oscillating substrate includes a main oscillating region and a thinned region that has a thickness smaller than that of the main oscillating region. The first and second electrodes are disposed on a first surface of the oscillating substrate and a second surface opposite to the first surface, respectively. The hollow frame is disposed on the second surface. The second electrode includes a second electrode portion that has at least one opening in positional correspondence with the thinned region. A method for making the crystal oscillator is also provided herein.

Abstract: An example resonating structure comprises a substrate, a resonator body, and an anchoring body for anchoring the resonator body to the substrate. The resonator body includes a layer of base material and, deposited on top of the layer of base material, a layer of mismatch material having a mismatch in temperature coefficient of elasticity (TCE) relative to the base material. The base material is doped with a dopant having a concentration chosen so as to minimize a second order temperature coefficient of frequency for the resonator body. The thickness of the layer of the mismatch material is chosen so as to minimize a first order temperature coefficient of frequency for the resonator body.

Abstract: A mixer-based microwave signal generation device is provided, and the mixer-based microwave signal generation device includes a microwave local oscillator source, a mixer, a first filter, a laser, an electro-optic modulator, an optical signal delayer, a photodetector, a second filter, an amplifier and a passive power divider.

Abstract: A clock generator includes a resistor-capacitor-based voltage-controlled oscillator (RC-based VCO) that generates an output signal with oscillation frequency controlled by an input voltage at an input node; and a temperature compensator that generates the input voltage to compensate change of the oscillation frequency associated with a change in temperature.

Abstract: A moveable micromachined member of a microelectromechanical system (MEMS) device includes an insulating layer disposed between first and second electrically conductive layers. First and second mechanical structures secure the moveable micromachined member to a substrate of the MEMS device and include respective first and second electrical interconnect layers coupled in series, with the first electrically conductive layer of the moveable micromachined member and each other, between first and second electrical terminals to enable conduction of a first joule-heating current from the first electrical terminal to the second electrical terminal through the first electrically conductive layer of the moveable micromachined member.

Abstract: A combined electric power generations' supply system includes an AC power generator that supplies power by off grid independent operation, a DC power supply device, an inverter that converts DC power output by the DC power supply device into AC power. The rotation calculation unit calculates a value relating to a rotation of a rotor when driving the virtual power generator according to an active power command based on a rotor model calculates a value relating to the rotation of the rotor of the virtual power generator and the active power command. The output determination unit determines values relating to an active power and a reactive power to be output to the inverter based on the calculated value relating to the rotation. The modulation control unit performs control of a pulse width modulation of the inverter based on the determined value relating to the active power and reactive power.

Abstract: A bypass circuit of an embodiment includes a switch that shorts-circuit between a first power conversion apparatus and a power storage apparatus. The switch is connected in parallel to a second power conversion apparatus. The first power conversion apparatus converts power generated from natural energy and outputs the converted power to a power distribution grid. The second power conversion apparatus converts surplus power that has not been converted by the first power conversion apparatus and charges the power storage apparatus with the converted power; or converts power discharged from the power storage apparatus and supplies the converted power to the first power conversion apparatus.

Abstract: An electronic control apparatus includes a first controller that is activated upon being fed with electric power through a first electric power feeding path, and a second controller that is fed with electric power through a second electric power feeding path. In the first electric power feeding path, there is provided a power supply switch that is turned on when a switch command is a connection command and turned off when the switch command is a cutoff command. The first controller transmits a state signal indicating whether it is in an activated state or a stopped state. The second controller diagnoses the power supply switch as being abnormal on condition that the state signal indicates the stopped state of the first controller when the switch command is the connection command or the state signal indicates the activated state of the first controller when the switch command is the cutoff command.

Abstract: A microwave resonator magnetic field measuring device (1) for measuring alternating magnetic fields, with a base plate (11) having at least one supporting/bearing/clamping point (111), at least one mechanical oscillator (12+13) formed as a microwave resonator in the form of a cantilever (13) having at least one magnetostrictive layer (12), the latter being connected and mounted at at least one point to the base plate (11) in the at least one supporting/bearing/clamping point (111), at least one input coupling means (161) for microwaves and at least one output coupling means (162) for microwaves, wherein the base plate (11) and the mechanical oscillator (12+13) formed as a microwave resonator are at least partly electrically conductive and electrically conductively connected to one another. Also, a magnetic field measuring method having a magnetic field measuring device according to the invention.

Abstract: Provided is a thermostatic type crystal oscillator with short operation stabilization time and low power consumption. A thermostatic type crystal oscillator according to the present invention includes a crystal resonator including an IT-cut crystal blank, a vibration control circuit configured to control a vibration frequency of the crystal resonator, a temperature regulator configured to regulate a temperature of the crystal resonator within a set temperature range by repeating heating and cooling to the crystal resonator, a heat conducting plate configured to function as a heat absorbing plate and a heat dissipating plate for the temperature regulator, a temperature control circuit configured to control a temperature of the temperature regulator, and a housing that accommodates the crystal resonator. The housing defines a resonator accommodating space in which the crystal resonator is accommodated inside the housing.

Abstract: A variable capacitor device comprises first and second control paths which are configured to enable differential control using first and second transistors of a same doping type in the first and second control paths, respectively, wherein the first and second transistors are configured as voltage variable resistors for tuning a capacitance of the variable capacitor device.

Abstract: The present application provides a wireless charging transmitting apparatus, comprising: a charging module comprising a charging coil; a plurality of electromagnet units arranged around the charging coil to form an electromagnet array; and a control unit for acquiring state information of a charging receiving apparatus, generating configuration information of the respective electromagnet units, and activating and configuring the electromagnet units to be a magnetic structure matched with the charging receiving apparatus, and the control unit controlling the charging module. The application further provides a method for controlling charging using the wireless charging transmitting apparatus. According to the embodiments of the application, the wireless charging transmitting apparatus is effectively compatible with and adapted to various types of charging receiving apparatuses by configuring the electromagnet units according to the state information of the charging receiving apparatus.

Abstract: Some examples relate to a system including a pulse modulation (PM) circuit having a PM input and a PM output. The system also includes a load circuit having a load circuit input, and an I/O pad coupling the PM output to the load circuit input. An asymmetry detection circuit has a first asymmetry detection (AD) input coupled to the PM output via a first feedback path, a second AD input coupled to an output node of the I/O pad via a second feedback path, and an AD output coupled to the PM input of the pulse modulation circuit via a control path.

Abstract: The electronic device comprises: a housing; a wireless charging circuit disposed inside the housing; and a wireless charging antenna electrically connected to the wireless charging circuit and having a spiral shape, wherein the wireless charging antenna comprises: a first conductive pattern corresponding to a region in which current flows toward the inside of the wireless charging antenna from among the regions forming the wireless charging antenna; and a second conductive pattern corresponding to a region in which current flows toward the outside of the wireless charging antenna from among the regions forming the wireless charging antenna, and being disposed on a side of the first conductive pattern on the same plane as and in parallel with the first conductive pattern. The first conductive pattern and the second conductive pattern are formed of a plurality of layers including a first layer and a second layer.

Abstract: Techniques for improving acoustic wave device structures are disclosed, including filters, oscillators and systems that may include such devices. First and second layers of piezoelectric material may be acoustically coupled with one another to have a piezoelectrically excitable resonance mode. The first layer of piezoelectric material may have a first piezoelectric axis orientation, and the second layer of piezoelectric material may have a second piezoelectric axis orientation that substantially opposes the first piezoelectric axis orientation of the first layer of piezoelectric material. The first and second layers of piezoelectric material have respective thicknesses so that the acoustic wave device has a resonant frequency that is in a super high frequency band or an extremely high frequency band.