A multiplexer device includes at least one acoustic band pass filter connected to a common port, and a hybrid LC/acoustic filter connected to the common port in parallel with the at least one acoustic band pass filter. Each acoustic band pass filter has a corresponding passband and includes multiple acoustic resonators. The hybrid LC/acoustic filter includes at least one acoustic resonator, and has at least one capacitor replaced by a corresponding at least one acoustic resonator, respectively. Each of the at least one acoustic resonator included in the hybrid LC/acoustic filter provides a stopband response when operating in a corresponding acoustic frequency range, and acts as a capacitor when operating in a corresponding non-acoustic frequency range.

The specification relates to an RF filter in which characteristic filter variables have a decreased dependency on tuning. A filter in this case comprises series-interconnected basic elements that each have an electroacoustic resonator and impedance converters interconnected in series between the basic elements.

A wide band through-body communication system communicates data through the body ultrasonically. A MEMS device such as a CMUT transducer is configured to transmit and/or receive ultrasonic data signals within a broad band of operating frequencies. The transducer transmits the ultrasonic data signals through the body to a similarly configured ultrasonic receiver, and/or receives ultrasonic data signals which have been conveyed through the body from a similarly configured ultrasonic transmitter for decoding and processing. In a preferred implementation a CMUT transducer is operated in a collapsed mode.

A RF transmitting device and method for transmitting digital information wherein the device is connected to or connectable with an antenna, the RF transmitting device having an RF source or transmitter, an electronic switch, a plurality electromechanical resonators each connected to the electronic switch. The electronic switch connects a selected one or selected ones of the electromechanical resonators between the RF source or transmitter and the antenna. Alternatively, the electronic switch connects a selected one or selected ones of the electromechanical resonators between different portions of the antenna. The electronic switch is controlled by a digital control unit for causing the electronic switch to couple RF energy produced by the RF source or transmitter to the antenna via the selected one or selected ones of the plurality of electromechanical resonators.

An ultrasonic device may include an electromechanical ultrasonic system defined by a predetermined resonant frequency, the electromechanical ultrasonic system including an ultrasonic transducer coupled to an ultrasonic blade. A method of controlling energy delivered to the ultrasonic device may include determining an impedance of the ultrasonic transducer during a transection process, analyzing the impedance of the ultrasonic transducer, profiling the ultrasonic blade based on the impedance, and adjusting a power delivered to the transducer during the transection process based on the profile of the blade. The method may further include pulsing, the power delivered to the ultrasonic transducer, determining changes in tissue characteristics of tissue located in an end effector, wherein the changes in tissue characteristics is determined between pulses, and adjusting power delivered to the ultrasonic transducer based on the tissue changes throughout the transection. An ultrasonic instrument may include components configured to effect the method.

A method of fabricating an electronics package includes forming a cavity in a first surface of a semiconductor substrate, forming one or more passive devices on the semiconductor substrate, forming a microelectromechanical device on a piezoelectric substrate, and bonding the semiconductor substrate to the piezoelectric substrate with the microelectromechanical device disposed within the cavity.

A multiplexer includes a common terminal, a first reception output terminal, a second reception output terminal, a first filter that is connected between the common terminal and the first reception output terminal, a second filter that is connected between the common terminal and the second reception output terminal and that has a passband different from that of the first filter, and an impedance matching circuit that is disposed between the common terminal and the second filter. The impedance matching circuit includes a serial arm resonator disposed in series on a path connecting the common terminal to the second filter.

A power supply circuit includes a switchable match, including a high voltage bus connectable to a load, a low voltage bus connectable to the load such that the load is in series between the high voltage bus and the low voltage bus, at least two capacitors having a fixed value of capacitance selectively connectable between the high voltage bus and the low voltage bus and a plurality of solid state switches equal in number to the number of capacitors having a fixed value of capacitance connectable between the high voltage bus and the low voltage bus, each switch configured and arranged to selectively connect or disconnect one of the capacitors having a fixed value of capacitance selectively connectable between the high voltage bus and the low voltage bus into electrical communication between the high voltage bus and the low voltage bus, and a variable frequency power supply including a high voltage output connection, the high voltage connection connected to the high voltage bus.

A RF transmitting device and method for transmitting digital information wherein the device is connected to or connectable with an antenna, the RF transmitting device having an RF source or transmitter, an electronic switch, a plurality electromechanical resonators each connected to the electronic switch. The electronic switch connects a selected one or selected ones of the electromechanical resonators between the RF source or transmitter and the antenna. Alternatively, the electronic switch connects a selected one or selected ones of the electromechanical resonators between different portions of the antenna. The electronic switch is controlled by a digital control unit for causing the electronic switch to couple RF energy produced by the RF source or transmitter to the antenna via the selected one or selected ones of the plurality of electromechanical resonators.

A sonic logging broadband impedance matching transformer modular design method and a module are related to sonic logging. The method includes the steps: obtaining component values of a multimodal equivalent circuit of a piezoelectric transducer by fitting actual impedance data of the piezoelectric transducer through a nonlinear regression method; selecting a T-type network structure composed of a matching capacitor and a matching inductor as a piezoelectric transducer impedance matching network structure; and presetting a to-be-matched frequency band and a reflection coefficient, and taking the multimodal equivalent circuit of the transducer as an artificial circuit load to optimize parameters of the piezoelectric transducer impedance matching network structure and a boosting transformer together so as to obtain final optimized parameters of the piezoelectric transducer impedance matching network structure and the transformer.