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Bias application for capacitive micromachined ultrasonic transducers

A technology of capacitive micromachines and ultrasonic transducers, which can be used in directions such as fluids that utilize vibrations, and can solve problems such as damaging bias source circuits

Active Publication Date: 2018-03-20
KOLO MEDICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the CMUT fails, such as a short across the transducing gap, it can damage the bias source or other circuitry

Method used

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  • Bias application for capacitive micromachined ultrasonic transducers
  • Bias application for capacitive micromachined ultrasonic transducers
  • Bias application for capacitive micromachined ultrasonic transducers

Examples

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Embodiment Construction

[0025] Some embodiments include techniques and arrangements for applying a bias voltage to a CMUT. Examples of CMUTs to which a bias voltage may be applied include: a CMUT element or subelement in a CMUT array, one or more CMUT cells in a CMUT system, and / or any other type of CMUT configuration. Herein the CMUT may comprise a first electrode opposite to a second electrode, wherein there is a transducing gap between the two electrodes. At least one of the electrodes is movable towards and away from the other for generating and / or receiving ultrasound energy. Transmit and / or receive (TX / RX) circuitry may be directly or indirectly electrically connected to one of the electrodes, and a bias voltage source may be directly or indirectly electrically connected to the other electrode (i.e., via or without any other electronic components).

[0026] In embodiments herein, one or more protective components may be included in the circuit between at least one of the electrodes and at lea...

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PUM

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Abstract

Bias application for capacitive micromachined ultrasonic transducers is disclosed. In some examples, a capacitive micromachined ultrasonic transducer (CMUT) includes a first electrode and a second electrode. The CMUT may be connectable to a bias voltage supply for supplying a bias voltage, and a transmit and / or receive (TX / RX) circuit. In some cases, a first capacitor having a first electrode maybe electrically connected to the first electrode of the CMUT, the first capacitor having a second electrode that may be electrically connected to the TX / RX circuit. Furthermore, a first resistor may include a first electrode electrically connected to the first electrode of the first capacitor and the first electrode of the CMUT. A second electrode of the first resistor may be electrically connected to at least one of: a ground or common return path, or the second electrode of the first capacitor.

Description

technical field [0001] Some of the examples herein relate to capacitive micromachined ultrasound transducers (CMUTs), such as may be used in ultrasound imaging or other applications. Background technique [0002] Ultrasound transducers are widely used in many different fields. Examples of ultrasonic transducers include lead zirconate titanate (PZT) transducers and capacitive micromachined ultrasonic transducers (CMUTs). A CMUT may comprise two electrodes arranged opposite each other, wherein a transducing gap separates the two electrodes. One of the two electrodes is movable towards and away from each other, enabling an energy exchange between acoustic energy and electrical energy. For example, a CMUT may be activated by an electrical signal to cause movement of movable electrodes in order to generate acoustic energy. Further, the impingement of acoustic energy on the movable electrodes of the CMUT can cause the generation of electrical signals. [0003] In some cases, t...

Claims

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Application Information

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IPC IPC(8): B06B1/02
CPCB06B1/02B06B1/0292
Inventor 庄雪锋D·赵Y·黄
Owner KOLO MEDICAL
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