An acoustic-wave device with active calibration mechanism is provided. The acoustic-wave device with active calibration mechanism includes at least one acoustic-wave duplexer, a voltage-controlled oscillator (VCO), a frequency discriminator and a control circuit. The acoustic-wave duplexer includes a TX filter and an RX filter. The voltage-controlled oscillator includes a calibration resonator and a tunable negative impedance circuit. The TX filter, the RX filter and the calibration resonator are disposed on the same piezoelectric substrate. The frequency discriminator generates a calibration signal according to a frequency deviation of the calibration resonator. The control circuit is connected to the acoustic-wave duplexer and the frequency discriminator. The control circuit adjusts an operating frequency of the TX filter or an operating frequency of the RX filter according to the calibration signal.

An oscillation module includes a loop interconnection, a high-frequency output interconnection, a differential amplifier, and an output terminal, the differential amplifier is connected to the output terminal with the high-frequency output interconnection, the high-frequency output interconnection crosses the loop interconnection in a grade-separated manner, and the loop interconnection is different in thickness between a crossing part and a non-crossing part with the high-frequency interconnection.

A device and method for preparing a locally heterogeneous smart composite material based on time-frequency regulated SAWs are provided. The method includes: mixing functional particles, a photosensitive liquid and a photoinitiator evenly; inputting periodic time-frequency regulated sinusoidal signals defined by a frequency, a duration, an interval time and a time difference to a pair of slanted-finger interdigital transducers, such that the pair of slanted-finger interdigital transducers are excited to produce corresponding standing SAWs; coupling and allowing the standing SAWs to enter a liquid tank to form a local sound field in the photosensitive liquid; forming, by the functional particles in the photosensitive liquid, a stable array distribution under the action of an acoustic radiation force of the local sound field; and turning on an UV light source for curing, thereby completing the preparation.

A method and crystal oscillator circuit for matching a supply voltage with a drive level of a crystal are disclosed. The crystal oscillator circuit is based on a Pierce oscillator circuit which further comprises a capacitor C.sub.d. The capacitor C.sub.d together with the load capacitor act as a capacitive voltage divider and the capacitance of this capacitor may be selected to reduce the supply voltage to match the drive level of the crystal oscillator without affecting the oscillation margin of the crystal.

A transmitting device for wireless transmission of measured parameters, which comprises a microcontroller controlling pulse generating means so that said pulse generating means generate at least one pulse position modulation (PPM) signal comprising information corresponding to at least one measured parameter value, wherein said pulse generating means comprise an oscillator and a power amplifier connected to said oscillator in order to amplify the pulses output from said oscillator and to output said PPM signal, and wherein said microcontroller is configured, for each pulse of said PPM signal to be generated, to activate only said oscillator for a first period of time and then to activate also said power amplifier only for a second period of time following said first period of time, said microcontroller being also configured to maintain deactivated said oscillator and said power amplifier outside the time interval defined by said first and second periods of time.

An oscillator is provided with an oscillator circuit having tank circuit terminals for coupling to a tank circuit. A microelectromechanical system (MEMS) resonator serves as a tank circuit. The MEMS resonator is coupled to the oscillator circuit using a transformer with a primary coil coupled to the oscillator tank circuit terminals and a secondary coil coupled to the MEMS resonator terminals, wherein the transformer has a turns ratio of N:1 and N is greater than 1.

A single frequency control device incorporating a high frequency resonator, a low frequency resonator and a temperature sensing element, the latter thermally coupled closely to the said resonators to facilitate temperature sensing with higher resolution and accuracy. Additional benefits offered by the structure include smaller size and lower cost.

An electronic component housing package includes an insulating substrate having an upper surface including a mount for an electronic component, a frame-shaped metallized layer surrounding the mount on the upper surface of the insulating substrate, and a metal frame joined to the frame-shaped metallized layer with a brazing material. The frame-shaped metallized layer includes a first sloping portion sloping inwardly from an upper surface to an inner peripheral surface. The brazing material includes a fillet portion formed between an upper outer periphery of the frame-shaped metallized layer and the metal frame, and a filling portion formed between the first sloping portion and the metal frame.

An apparatus comprising a film bulk acoustic resonator and a field effect transistor (207), the film bulk acoustic resonator comprising first and second electrodes (201, 202) separated by a piezoelectric material (203), the piezoelectric material configured such that the application of a potential difference between the first and second electrodes enables the generation of an acoustic wave and associated surface charge in the piezoelectric material, the field effect transistor (207) comprising a channel (208), and source and drain electrodes (209, 210) configured to enable a flow of electrical current through the channel when a potential difference is applied between the source and drain electrodes, wherein the first electrode (201) of the film bulk acoustic resonator comprises electrically connected first and second portions, the second portion capacitively coupled to the channel (208) of the field effect transistor via a dielectric material, and wherein the first portion of the first electrode (201) is capacitively coupled to the piezoelectric material such that the surface charge generated in the piezoelectric material (203) induces a corresponding charge in the first electrode which causes a variation in the electrical current flowing through the channel via the second portion of the first electrode, the variation in electrical current producing an output signal having a frequency which corresponds to that of the acoustic wave.

An integrated circuit may include a resonator formed from FinFET devices. The resonator may include drive cells of alternating polarities and sense cells interposed between the drive cells. Each of the drive cells may include at least two drive transistors having fins coupled to a drive terminal. Each sense cell may include two sense transistors having one fin coupled to a sense terminal and another fin coupled to ground. Adjacent drive and sense cells may be separated by an intervening region that can accommodate a number of fins. Configured in this way, the resonator can exhibit a high quality factor, low phase noise, and can operate at a frequency that is less than the characteristic resonant frequency as defined by the fin pitch of the drive and sense transistors.