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公开(公告)号：US20210140841A1
公开(公告)日：2021-05-13
申请号：US16625521
申请日：2018-06-15
Inventor： Amal HAJJAJ , Md Abdullah Al HAFIZ , Mohammad Ibrahim YOUNIS
IPC: G01L9/00
Abstract: An electromechanical pressure sensor includes an electromechanical resonator having a driving electrode, a sensing electrode, and a beam resonator arranged between the driving and sensing electrodes. The beam resonator includes a resonator beam coupled on a first end to a first fixed anchor and coupled on a second end to a fixed second fixed anchor. The electromechanical resonator also includes a first voltage source coupled to the driving electrode and configured to provide an alternating current to the driving electrode and a second voltage source coupled to the first fixed anchor. The second voltage source provides a DC bias to the resonator beam. The electromechanical resonator further includes a third voltage source coupled to the resonator beam via the first and second fixed anchors. The third voltage source is configured to supply a voltage to the resonator beam that results in a temperature differential between the resonator beam and the first and second fixed anchors. The electromechanical resonator also includes a processor coupled to the sensing electrode and configured to correlate a voltage on the sensing electrode with a pressure value.
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公开(公告)号：US20210242858A1
公开(公告)日：2021-08-05
申请号：US17165567
申请日：2021-02-02
Inventor： Sherif Adekunle TELLA , Mohammad Ibrahim YOUNIS
Abstract: A logic system includes a microelectromechanical system, MEMS, resonator having an arch beam and first and second side beams, wherein the first side beam is attached with a first end to a first end of the arch beam and the second side beam is attached with a first end to a second end of the arch beam to form a U-shape; an input electrode facing the second side beam; a selector electrode facing the second side beam; a first output electrode facing the first side beam; and a second output electrode facing the arch beam.
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公开(公告)号：US20210025851A1
公开(公告)日：2021-01-28
申请号：US17040099
申请日：2019-05-06
Inventor： Nizar JABER , Mohammad Ibrahim YOUNIS
IPC: G01N29/02 , G01N29/036
Abstract: A combined vapor and/or gas concentration sensor and switch includes a resonating structure having a first side with a functionalized surface and a second side opposite the first side, a first resonant frequency of a first vibration mode, and a third resonant frequency of a third vibration mode. A direct current bias source is coupled to the resonating structure. A first AC voltage source is coupled to the drive electrode and provides the resonating structure, via the drive electrode, with a first voltage having an amplitude causing the first vibration mode of the resonating structure to exhibit a pull-in band and having a frequency adjacent the pull-in band of the first mode. A second AC voltage source is coupled to the drive electrode and provides the resonating structure, via the drive electrode, with a second voltage having a frequency corresponding to the third resonant frequency. A read-out circuit is coupled to the sensing electrode and is configured to determine a vapor and/or gas concentration based on a difference between the frequency of the second voltage supplied by the second AC voltage source and a frequency obtained by the read-out circuit.
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公开(公告)号：US20220069824A1
公开(公告)日：2022-03-03
申请号：US17411698
申请日：2021-08-25
Inventor： Sherif Adekunle TELLA , Mohammad Ibrahim YOUNIS
Abstract: A cascadable resonator logic system includes a substrate; a first straight beam anchored with a first end to the substrate; a second straight beam anchored with a first end to the substrate; a first arch beam, which is curved, and is attached with a first end to a second end of the first straight beam, at a first joint, and with a second end to a second end of the second straight beam, at a second joint, so that both the first and second ends of the first arch beam are suspended above the substrate; and a second arch beam, which is also curved, and is attached with a first end to the second joint, and a second end is anchored to the substrate.
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公开(公告)号：US20190165757A1
公开(公告)日：2019-05-30
申请号：US16318220
申请日：2017-08-08
Inventor： Md Abdullah AL HAFIZ , Mohammad Ibrahim YOUNIS , Lakshmoji KOSURU
Abstract: Embodiments of a tunable bandpass microelectromechanical (MEMS) filter are described. In one embodiment, such a filter includes a pair of arch beam microresonators, and a pair of voltage sources electrically coupled to apply a pair of adjustable voltage biases across respective ones of the pair of arch beam microresonators. The pair of voltage sources offer independent tuning of the bandwidth of the filter. Based on the structure and arrangement of the filter, it can be tunable by 125% or more by adjustment of the adjustable voltage bias. The filter also has a relatively low bandwidth distortion, can exhibit less than 2.5 dB passband ripple, and can exhibit sideband rejection in the range of at least 26 dB.
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Patent Agency Ranking
公开(公告)号：US20180149619A1
公开(公告)日：2018-05-31
申请号：US15575962
申请日：2016-06-23
Inventor： Mohammad Ibrahim YOUNIS
IPC: G01N29/02 , H01H59/00 , H01H35/42 , G01N29/036
CPC classification number: G01N29/022 , G01N29/036 , G01N29/2406 , G01N2291/021 , G01N2291/0255 , G01N2291/0256 , G01N2291/02809 , H01H35/42 , H01H59/0009
Abstract: Embodiments in accordance of a torsional resonant sensor disclosure is configured to actuate a beam structure using electrostatic actuation with an AC harmonic load (e.g., AC and DC voltage sources) that is activated upon detecting a particular agent having a mass above a predefined level. In various embodiments, the beam structure may be different types of resonant structures that is at least partially coated or layered with a selective material.
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公开(公告)号：US20220196603A1
公开(公告)日：2022-06-23
申请号：US17441939
申请日：2019-04-18
Inventor： Nizar Riyad Khaled JABER , Amal HAJJAJ , Nouha ALCHEIKH , Mohammad Ibrahim YOUNIS
IPC: G01N29/036 , G01N33/00
Abstract: A gas sensor includes a microbeam configured to vibrate when driven by a driving electrode; a vibrometer configured to measure a frequency associated with a vibration of the microbeam; a power source configured to apply a first voltage (V1) to the microbeam to heat the microbeam; and a controller configured to control the power source and to receive the frequency measured by the vibrometer. The controller controls the power source to heat the microbeam so that the microbeam is at a buckling point, and the controller determines at least one characteristic of a gas present around the microbeam, based on the frequency received from the vibrometer.
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公开(公告)号：US20210111723A1
公开(公告)日：2021-04-15
申请号：US16606436
申请日：2018-04-17
Inventor： Karumbaiah Chappanda NANAIAH , Mohammad Ibrahim YOUNIS
Abstract: Embodiments include a logic gate system comprising a first micro-cantilever beam arranged in parallel to a second micro-cantilever beam in which a length of the first micro-cantilever beam is shorter than a length of the second micro-cantilever beam. The first micro-cantilever beam is adjacent to the second micro-cantilever beam and the first micro-cantilever beam is coupled to an input DC bias voltage source to the logic gate system. The second micro-cantilever beam is coupled to an input AC voltage signal that dynamically sets a logic operation of the logic gate system by at least changing an operating resonance frequency for one or more of the first micro-cantilever beam and the second micro-cantilever beam.
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公开(公告)号：US20190341920A1
公开(公告)日：2019-11-07
申请号：US16332150
申请日：2017-09-21
Inventor： Saad ILYAS , Md Abdullah Al HAFIZ , Hossein FARIBORZI , Mohammad Ibrahim YOUNIS
Abstract: A mechanical resonator-based cascadable logic device includes which includes a resonator having a beam with a first fixed end, a second fixed end, and a length between the first and second fixed ends. A first electrode and a second electrode are aligned along a first side of the beam. A third electrode and a fourth electrode are aligned along a second side of the beam and opposite the first and second electrodes. A DC voltage source is coupled to one of the first and second fixed ends of the beam. At least one of the first, second, third, and fourth electrodes is coupled to a first AC voltage source so that a logic operation is performed by activating a second resonant mode of the resonator.
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公开(公告)号：US20220163418A1
公开(公告)日：2022-05-26
申请号：US17441941
申请日：2020-04-15
Inventor： Nouha ALCHEIKH , Amal HAJJAJ , Mohammad Ibrahim YOUNIS
IPC: G01L9/00
Abstract: A device for measuring pressure includes a curved microbeam having opposing ends, a length extending between the pair of opposing ends, and a plurality of resonant frequencies, an actuating electrode extending along the length of the curved microbeam and spaced from the curved microbeam, an AC power source in communication with one of the opposing ends and the actuating electrode to deliver an AC signal at a first symmetric resonant frequency and a second symmetric resonant frequency selected from the plurality of resonant frequencies to the curved microbeam, a DC power source in communication with the opposing ends to pass an electrothermal voltage along a length of the curved microbeam, and a frequency monitoring device to monitor changes in the first symmetric resonant frequency and the second symmetric resonant frequency caused by an ambient pressure surrounding the curved microbeam.
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