A self-oscillating piezoelectric actuator drive circuit includes a integrating circuit; an inverter (INV1), inverters (INV2 and INV3) inverting an output signal of the inverter (INV1), sense resistors (Rs1 and Rs2) connected to output sides of the inverters (INV2 and INV3), a positive feedback resistor (Rfb2) feeding back an output signal of the inverters (INV2 and INV3) to the integrating circuit; and a negative feedback resistor (Rfb1) feeding back a voltage generated from the sense resistors (Rs1 and Rs2, Rs1<Rs2 in terms of a resistance value) to the integrating circuit. In a startup state, the sense resistor (Rs2) and the inverter (INV3) are selected, and in an operating state after the startup state, the sense resistor (Rs1) and the inverter (INV2) are selected.

Systems, devices, and methods for providing limited duration haptic effects are disclosed. Systems for providing limited duration haptic effects include sensors, control circuits, and vibration actuators configured closed loop feedback control of the vibration actuators. The sensors are configured to measure motion characteristics induced by the vibration actuators. The control circuits are configured to receive motion characteristic information from the sensors and provide closed loop feedback control of the vibration actuators. Closed loop feedback control permits precise control of vibration actuator output during limited duration haptic effects.

A system and a method are disclosed for applying a vibration to a container comprising a content, said container held by an end effector attached to a mechatronic manipulator, the system comprising a vibration generator operatively coupled to at least one of the end effector and the mechatronic manipulator at an operating distance from the container such that when said vibration generator is in operation, said vibration generator causes said container to vibrate accordingly and a controller operatively connected to the vibration generator, the controller for generating and providing a controlling signal to the vibration generator.

Amplifier architecture that allows low-cost class-D audio amplifiers to be compatible with ultrasonic signals, as well as loads presented by thin-film ultrasonic transducers. The amplifier architecture replaces the traditional capacitor used as an output filter in the class-D amplifier with the natural capacitance of the ultrasonic transducer load, and employs relative impedance magnitudes to create an under-damped low-pass filter that boosts voltage in the ultrasonic frequency band of interest. The amplifier architecture includes a secondary feedback loop to ensure that correct output voltage levels are provided.

A High Definition ViscoElastography (HDVE) inertial driver apparatus of an imaging system and method includes one or more HDVE inertial driver devices. Each HDVE inertial driver device has: (i) a driver interface that enables receiving a driver signal from a controller; (ii) a resonating surface; and (iii) an inertial driver communicatively coupled to the driver interface and mechanically coupled to the resonating surface to independently generate a resonating displacement of the resonating surface. A support member of the HDVE inertial driver apparatus positions the two or more HDVE inertial driver devices into acoustic contact with a body to produce a shear wave field through a volume of tissue within the body or a material within an object.

An electronic apparatus to which an external apparatus is detachably attachable includes a controlling unit configured to make a vibration device vibrate by using a vibration parameter corresponding to a type of the external apparatus to be attached to the electronic apparatus, the vibration device being provided on at least one of the electronic apparatus and the external apparatus.

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.

Amplifier architecture that allows low-cost class-D audio amplifiers to be compatible with ultrasonic signals, as well as loads presented by thin-film ultrasonic transducers. The amplifier architecture replaces the traditional capacitor used as an output filter in the class-D amplifier with the natural capacitance of the ultrasonic transducer load, and employs relative impedance magnitudes to create an under-damped low-pass filter that boosts voltage in the ultrasonic frequency band of interest. The amplifier architecture includes a secondary feedback loop to ensure that correct output voltage levels are provided.

An accelerometer and a linear resonant actuator (LRA) are mechanically coupled, such as by being mounted to the same circuit board. The output of the accelerometer is evaluated in order to select a drive frequency for the LRA. For example, the drive frequency may be varied while measuring the magnitude of acceleration induced by the LRA. The output of the accelerometer may further be used to perform a fitness tracking function, such as counting steps or detecting an activity level.

Control consoles and methods for supplying a drive signal to a surgical tool are provided. The control console comprises a transformer with primary and secondary windings. The primary winding receives an input signal from a power source and induces the drive signal in the secondary winding to supply the drive signal to the surgical tool. A first current source comprising a leakage control winding is coupled to a path of the drive signal. The primary winding induces a first cancellation current in the leakage control winding to inject into the path of the drive signal to cancel leakage current. A sensor coupled to the path of the drive signal outputs a sensed signal to provide feedback related to leakage current. The sensor may connect to a second leakage current cancellation source and/or a fault detection stage. The power source may be variable and may also energize the second current source.