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公开(公告)号：US20240280620A1
公开(公告)日：2024-08-22
申请号：US18417318
申请日：2024-01-19
CPC分类号： G01R27/2611 , G01D5/22 , H03K17/952
摘要： A method can include in a first phase of a sensing operation, controlling at least a first switch to energize a sensor inductance; in a second phase of the sensing operation that follows the first phase, controlling at least a second switch to couple the sensor inductance to a first modulator capacitance to induce a first fly-back current from the sensor inductance, the first fly-back current generating a first modulator voltage at the first modulator capacitance, and in response to the first modulator voltage, controlling at least a third switch to generate a balance current that flows in an opposite direction to the fly-back current at the first modulator node. The first and second phases can be repeated to generate a first modulator voltage at the first modulator capacitance. the modulator voltage can be converted into a digital value representing the sensor inductance. Related devices and systems are also disclosed.
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公开(公告)号：US20230204644A1
公开(公告)日：2023-06-29
申请号：US18099105
申请日：2023-01-19
CPC分类号： G01R27/2611 , G01D5/22 , H03K17/952
摘要： A method can include in a first phase of a sensing operation, controlling at least a first switch to energize a sensor inductance; in a second phase of the sensing operation that follows the first phase, controlling at least a second switch to couple the sensor inductance to a first modulator capacitance to induce a first fly-back current from the sensor inductance, the first fly-back current generating a first modulator voltage at the first modulator capacitance, and in response to the first modulator voltage, controlling at least a third switch to generate a balance current that flows in an opposite direction to the fly-back current at the first modulator node. The first and second phases can be repeated to generate a first modulator voltage at the first modulator capacitance. the modulator voltage can be converted into a digital value representing the sensor inductance. Related devices and systems are also disclosed.
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公开(公告)号：US20230071912A1
公开(公告)日：2023-03-09
申请号：US17902356
申请日：2022-09-02
发明人： Andriy MAHARYTA
摘要： Apparatuses and methods of capacitance-to-digital code conversion are described. One apparatus includes a bridge circuit and a modulator front-end circuit. The bridge circuit includes a first terminal to couple to a reference cell and a second terminal to couple to a sensor cell. The modulator front-end circuit includes a comparator coupled to the bridge circuit, a first modulation capacitor coupled to a first input of the comparator, and a second modulation capacitor coupled to a second input of the comparator. The modulator front-end circuit provides a digital bitstream. A duty cycle of the digital bitstream is representative of a ratio between a capacitance of the sensor cell and a reference capacitance of the reference cell.
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公开(公告)号：US20230324269A1
公开(公告)日：2023-10-12
申请号：US17716644
申请日：2022-04-08
摘要： A hydrometer device according to an example includes a floating waterproof device container, and a liquid level sensor positioned in the device container to sense an immersion level of the device container when the device container is floating in a container of liquid. The hydrometer device further includes a conversion circuit positioned in the device container to convert the sensed immersion level to a digital value, and a controller positioned in the device container to determine a liquid density value for the liquid based on the digital value.
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公开(公告)号：US20230110841A1
公开(公告)日：2023-04-13
申请号：US17898641
申请日：2022-08-30
发明人： Richard SWEET, JR. , Igor KOLYCH , Mykhaylo KREKHOVETSKYY , Igor KRAVETS , Oleksandr KARPIN , Andriy MAHARYTA
摘要： A system can include one or more electrodes; a sensor structure configured to position electrodes over a surface of a body that includes an artery. A capacitance sensing circuit can be coupled to the electrodes and configured to acquire capacitance values of the electrodes over a predetermined time period. The capacitance values can correspond to a distance between the body surface and the at least one electrode. Processor circuits can be configured to generate APW data from the capacitance values. Corresponding methods and devices are also disclosed.
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公开(公告)号：US20230088156A1
公开(公告)日：2023-03-23
申请号：US17954208
申请日：2022-09-27
发明人： Andriy MAHARYTA , Hans KLEIN , Oleksandr KARPIN , Roman OGIRKO
摘要： Apparatus and methods of impedance sensing are described. One method includes performing a first digital conversion of an attribute of a sensor electrode and performing a second digital conversion of the attribute of the sensor electrode. The second digital conversion differs by at least one characteristic from the first digital conversion. The method further includes calculating a resistance of the sensor electrode from a first and second digital value of the first and second digital conversions, respectively; and calculating a capacitance of the sensor electrode from the first and second digital value of the first and second digital conversions, respectively.
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