摘要:
Aspects of the technology described herein relate to built-in self-testing (BIST) of circuitry (e.g., a pulser or receive circuitry) and/or transducers in an ultrasound device. A BIST circuit may include a transconductance amplifier coupled between a pulser and receive circuitry, a capacitor network coupled between a pulser and receive circuitry, and/or a current source couplable to the input terminal of receive circuitry to which a transducer is also couplable. The collapse voltages of transducers may be characterized using BIST circuitry, and a bias voltage may be applied to the membranes of the transducers based at least in part on their collapse voltages. The capacitances of transducers may also be measured using BIST circuitry and a notification may be generated based on the sets of measurements.
摘要:
Aspects of the technology described herein relate to built-in self-testing (BIST) of circuitry (e.g., a pulser or receive circuitry) and/or transducers in an ultrasound device. A BIST circuit may include a transconductance amplifier coupled between a pulser and receive circuitry, a capacitor network coupled between a pulser and receive circuitry, and/or a current source couplable to the input terminal of receive circuitry to which a transducer is also couplable. The collapse voltages of transducers may be characterized using BIST circuitry, and a bias voltage may be applied to the membranes of the transducers based at least in part on their collapse voltages. The capacitances of transducers may also be measured using BIST circuitry and a notification may be generated based on the sets of measurements.
摘要:
Disclosed are a packing box equipped with an airbag for shock-absorbing and a manufacturing method thereof, in which the airbag consisting of a plurality of air cells is integrally formed with an inner surf ace of the packing box by means of heat and pressure, instead of installing a separate shock-absorbing member in the packing box, and then air is injected into the airbag, wherein the air cells of the airbag have their own one-way valves, respectively, so the shock-absorbing function of the airbag is continuously maintained even if some air cells are broken, and additionally support square bars are integrally formed with a lower surface of the packing box, thereby further absorbing impact applied to the packing box.