The present invention relates to an electronic vibrator comprising: a power supply unit for converting AC power into DC power; a bridge circuit unit comprising an IGBT, as a power switching element, in order to enable driving of a large-capacity oscillator; a circuit driving unit for driving the bridge circuit unit, the circuit driving unit applying a sine wave, which is a sine wave PWM modulation reference wave, together with a triangular wave; and a vibration generator connected to the bridge circuit unit so as to generate vibration by means of an electric current provided by the bridge circuit unit, wherein the vibration generator comprises: an E core, which has an E-shape, which is made of a steel plate, and which comprises multiple overlapping layers; an I core, which is positioned at a distance from the E core, which is made of a steel plate, which comprises multiple overlapping layers, and which has an I-shape; a winding unit wound around a portion horizontally protruding from the center of the E core, an AC current being applied to the winding unit; a housing for containing the E core, the I core, and the winding unit; a wing plate protruding from a side wall of the housing and comprising a wing through-hole, which is a bored hole; a bottom plate member, which is positioned at a distance from the housing, and which has a containing groove, thereby containing the I core; a bolt which penetrates the wing through-hole and is coupled to the bottom plate member; and a urethane spring, which is coupled to the housing, which adjusts impacts and buffering, and which is made of urethane. The electronic vibrator has the following advantageous effects: the same pulverizes/scatters powder, which is transferred inside a chute, a hopper, or a transfer piping facility, thereby preventing a sloping discharge opening from being narrowed or clogged by adsorption or flocking of the powder inside the discharge opening; liquidity of a manufacturing facility is improved/maintained such that powder can be efficiently transferred/supplied from the facility to transfer lines; a sloping discharge opening of the facility is prevented from being narrowed or clogged by adsorption or flocking of the powder inside the discharge opening; the electronic vibrator can be applied to an existing facility comparatively easily and installed/used; it is possible to prevent an excessive flow of electric current due to an increased time of application of current to a power element in an ultra-low frequency operation range; prevention of an excessive flow of electric current leads to prevention of a fracture of the power element; and a stable operation can be guaranteed, even in the ultra-l

Ultrasound imaging and therapy with the same array of capacitive micromachined ultrasonic transducers is provided. The electronics includes a per-pixel switch for each transducer element. The switches provide an imaging mode driven completely by on-chip electronics and a therapy mode where off-chip pulsers provide relatively high voltages to the transducer elements.

An acoustic transmitter for transmitting an acoustic signal through a downhole medium includes a voltage source; a composite load; and switching circuitry that applies voltage from the voltage source across the composite load in response to a drive signal. The composite load includes charge control circuitry, in the form of at least one inductor, connected electrically in series with a piezoelectric transducer that may be electrically modeled as a capacitor.

An ultrasonic measuring apparatus includes an ultrasonic transducer device having a substrate and an ultrasonic transducer element array that has a first channel group and a second channel group that are arranged on the substrate, a first integrated circuit apparatus that is mounted on the substrate, at one edge portion of the ultrasonic transducer element array in a first direction, such that a long-side direction coincides with a second direction that intersects the first direction, and performs at least one of signal transmission to the first channel group and signal reception from the first channel group, and a second integrated circuit apparatus that is mounted on the substrate, at the other edge portion of the ultrasonic transducer element array in the first direction, such that the long-side direction coincides with the second direction, and performs at least one of signal transmission to the second channel group and signal reception from the second channel group. In the ultrasonic transducer element array, the first group of channels and the second group of channels are arranged alternately every channel in the second direction.

The invention concerns a method for controlling at least one gas bubble produced in a localised manner in a medium (3′) allowing the movement of said at least one gas bubble, characterised in that it comprises a step consisting of generating at least one ultrasound burst towards said at least one gas bubble, said at least one burst being emitted for a burst duration at least partially covering a duration during which said gas is effectively being produced.

The present disclosure is generally directed to a method for driving an ultrasonic transducer. The method includes coupling a driving electrode and a ground electrode of the ultrasonic transducer to a power supply and a ground, respectively, during a first time period based on a received drive signal. The method further includes decoupling the driving electrode and the ground electrode of the ultrasonic transducer from the power supply and the ground, respectively, to float the driving electrode and the ground electrode of the ultrasonic transducer during a second time period based on the received drive signal to store a charge between the driving electrode to the ground electrode.

Circuitry for ultrasound devices is described. A multi-level pulser is described, which can support time-domain and spatial apodization. The multi-level pulser may be controlled through a software-defined waveform generator. In response to the execution of a computer code, the waveform generator may access master segments from a memory, and generate a stream of packets directed to pulsing circuits. The stream of packets may be serialized. A plurality of decoding circuits may modulate the streams of packets to obtain spatial apodization.

Circuitry for ultrasound devices is described. A multi-level pulser is described, which can support time-domain and spatial apodization. The multi-level pulser may be controlled through a software-defined waveform generator. In response to the execution of a computer code, the waveform generator may access master segments from a memory, and generate a stream of packets directed to pulsing circuits. The stream of packets may be serialized. A plurality of decoding circuits may modulate the streams of packets to obtain spatial apodization.

This application relates to methods and apparatus for driving a transducer with switching drivers. A driver circuit has first and second switching drivers for driving the transducer in a bridge-tied-load configuration, each of the switching drivers having a respective output stage for controllably switching the respective driver output node between high and low switching voltages with a controlled duty cycle. Each of switching drivers is operable in a plurality of different driver modes, wherein the switching voltages are different in said different driver modes. A controller controls the driver mode of operation and the duty cycle of the switching drivers based on the input signal. The controller is configured to control the duty cycles of the first and second switching drivers within defined minimum and maximum limits of duty cycles; and to transition between driver modes of operation when the duty cycle of one of the switching drivers reaches a duty cycle limit.

Systems and methods for non-invasive fat reduction can include targeting a region of interest below a surface of skin, which contains fat and delivering ultrasound energy to the region of interest. The ultrasound energy generates a thermal lesion with said ultrasound energy on a fat cell. The lesion can create an opening in the surface of the fat cell, which allows the draining of a fluid out of the fat cell and through the opening. In addition, by applying ultrasound energy to fat cells to increase the temperature to between 43 degrees and 49 degrees, cell apoptosis can be realized, thereby resulting in reduction of fat.