A driving device is provided. The driving device includes a boost inductor and a resonance circuit. The boost inductor receives a first power via a first terminal of the boost inductor in a first mode and provides a second power via a second terminal of the boost inductor. The resonance circuit stores a stored electric energy from the second power in the first mode, so that the boost inductor does not provide the second power in the second mode and drives a transducer by the stored electric energy in the first mode and the second mode.

A system and method for an acoustically driven ferromagnetic resonance (ADFMR) based sensor including: a power source, that provides an electrical signal to power the system; and an ADFMR circuit, sensitive to electromagnetic fields, wherein the ADFMR circuit comprises an ADFMR device. The system functions to detect and measure external electromagnetic (EM) fields by measuring a perturbation of the electrical signal through the ADFMR circuit due to the EM fields.

A battery-powered, modular surgical device comprising an electrically powered surgical instrument that requires a pre-determined minimum amount of electrical energy to complete a surgical procedure, and a power module assembly that has a battery that powers the surgical instrument and has a current state of electrical charge, and a control circuit that is electrically coupled to the battery and the surgical instrument and has a memory and a microprocessor. The microprocessor determines the current state of electrical charge of the battery, compares the current state of electrical charge to the pre-determined minimum amount of electrical energy, permits the battery to discharge if the current state of electrical charge is above the pre-determined minimum amount of electrical energy, and maintains the battery in a non-discharge state if the current state of electrical charge is below the pre-determined minimum amount of electrical energy.

An ultrasound circuit comprising a trans-impedance amplifier (TIA) with built-in time gain compensation functionality is described. The TIA is coupled to an ultrasonic transducer to amplify an electrical signal generated by the ultrasonic transducer in response to receiving an ultrasound signal. The TIA is, in some cases, followed by further analog and digital processing circuitry.

Provided is a portable audio equipment comprising: a neckband-shaped housing having one side open; a vibration unit including a plurality of vibration modules provided in at least two regions corresponding to both sides of the housing; and a control unit for sensing a control signal including information on a vibration pattern for each of the plurality of vibration modules and controlling the plurality of vibration modules to output the vibration pattern, wherein the vibration pattern is related to event information that is generated in an external terminal device.

A vibration signal generation apparatus includes an absolute value signal generator configured to generate an absolute value signal by detecting an absolute value of amplitude of an acoustic signal, an envelope signal generator configured to generate an envelope signal by detecting an envelope of the absolute value signal, a differentiator configured to differentiate the envelope signal, an amplitude limiter configured to generate an amplitude-limited signal by limiting amplitude of the envelope signal so that an amplitude value of the differentiated envelope signal becomes zero or greater, and a vibration signal generator configured to generate a vibration signal by multiplying the amplitude-limited signal by a reference signal having a frequency that allows a human to perceive a vibration.

A vibro-acoustic assembly and related systems and methods for applying a wide range of audio frequencies in one or multiple channels to living beings for wellbeing. The assembly is ergonomic, compact, portable and configured to address physically any area of a user's body while being flexible and easy to use to deliver a wide degree of frequencies/identified targeted programs from a source audio device, such as a smart phone application via wireless transmission.

An acoustic-electric transducer includes a connection part that has a first connection point able to contact a first contact in a terminal for processing the electrical signal, and a second connection point able to contact a second contact having a potential lower than the potential of the first contact, a microphone that transduces a sound inputted from an external source into an electrical signal, a changeover switch that switches between a non-mute state where the electrical signal is outputted to the terminal and a mute state where the electrical signal is not outputted to the terminal, and a current control circuit that makes a current flow between the first contact and the second contact until a predetermined time passes from the time when the connection part is connected to the terminal and reduces the current flowing between the first contact and the second contact after the predetermined time passes, the current control circuit being provided between the changeover switch and the connection part.

A battery-powered, modular surgical device comprising an electrically powered surgical instrument that requires a pre-determined minimum amount of electrical energy to complete a surgical procedure, and a power module assembly that has a battery that powers the surgical instrument and has a current state of electrical charge, and a control circuit that is electrically coupled to the battery and the surgical instrument and has a memory and a microprocessor. The microprocessor determines the current state of electrical charge of the battery, compares the current state of electrical charge to the pre-determined minimum amount of electrical energy, permits the battery to discharge if the current state of electrical charge is above the pre-determined minimum amount of electrical energy, and maintains the battery in a non-discharge state if the current state of electrical charge is below the pre-determined minimum amount of electrical energy.

An ultrasound transducer assembly (10) is disclosed comprising a plurality of transducer elements (32) for transmitting and receiving ultrasound waves (24) each having a substrate (40) and a flexible membrane (46) disposed in a distance from a substrate. An AC voltage control unit (56) is provided for controlling an AC voltage provided to each of the transducer elements, and a DC voltage control unit (60) for controlling a DC bias voltage provided to the transducer elements in order to bring the flexible membranes in a collapse mode into contact with the substrate. The DC voltage control unit is adapted to disconnect the DC bias voltage from the transducer elements temporarily during the operation of the ultrasound transducer assembly to limit the collapse mode.