Patents by Inventor Saeed Mohammadi
Saeed Mohammadi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11931147Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.Type: GrantFiled: May 13, 2022Date of Patent: March 19, 2024Assignee: Apple Inc.Inventors: Saeed Mohammadi, Albert E. Cerussi, Paul D. Mannheimer
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Publication number: 20230400450Abstract: A biological sensing system, comprising a microelectrode array having a plurality of islands that are thermally isolated from each other and are interconnected by flexible nano-scale wires. An embedded complementary metal oxide semiconductor (CMOS) instrumentation amplifier and wireless communication circuitry may be operatively connected to the microelectrode array and embedded within input/output pads connected to the wires at the periphery of the array.Type: ApplicationFiled: April 14, 2023Publication date: December 14, 2023Applicant: Purdue Research FoundationInventors: Hossein Pajouhi, Saeed Mohammadi, Mojgan Sarmadi
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Patent number: 11749487Abstract: A field emitter array (FEA) vacuum transistor is disclosed which includes a substrate and a plurality of nanorods formed of a first polarity dopant on the substrate, wherein the dopant density is between about 1013 cm?3 to about 1015 cm?3.Type: GrantFiled: March 22, 2022Date of Patent: September 5, 2023Assignee: Purdue Research FoundationInventors: Saeed Mohammadi, Shabnam Ghotbi
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Publication number: 20230257802Abstract: This disclosure relates to catalytic nucleic acid probes, biosensors and lateral flow biosensor systems and methods and kits of using the probes, biosensors and lateral flow biosensor systems for detecting microorganisms such as Staphylococcus aureus.Type: ApplicationFiled: November 18, 2022Publication date: August 17, 2023Inventors: Monsur Ali, Dawn White, Saeed Mohammadi, John D. Brennan, Yingfu Li, Alfredo Capretta
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Patent number: 11552240Abstract: A sensor is disclosed which includes a piezoelectric layer, a piezoresistive layer, one or more electrode layers coupled to the piezoelectric layer and to the piezoresistive layer, the piezoelectric layer configured to provide an electrical signal in response to application of a dynamic disturbance, and the piezoresistive layer configured to provide a change in resistivity in response to application of a static disturbance.Type: GrantFiled: September 16, 2019Date of Patent: January 10, 2023Assignee: Purdue Research FoundationInventors: Mukerrem Cakmak, Armen Yildirim, Rahim Rahimi, Saeed Mohammadi, Ali Shakouri
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Publication number: 20220301805Abstract: A field emitter array (FEA) vacuum transistor is disclosed which includes a substrate and a plurality of nanorods formed of a first polarity dopant on the substrate, wherein the dopant density is between about 1013 cm?3 to about 1015 cm?3.Type: ApplicationFiled: March 22, 2022Publication date: September 22, 2022Applicant: Purdue Research FoundationInventors: Saeed Mohammadi, Shabnam Ghotbi
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Publication number: 20220273207Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.Type: ApplicationFiled: May 13, 2022Publication date: September 1, 2022Inventors: Saeed MOHAMMADI, Albert E. CERUSSI, Paul D. MANNHEIMER
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Patent number: 11331016Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.Type: GrantFiled: September 25, 2019Date of Patent: May 17, 2022Assignee: Apple Inc.Inventors: Saeed Mohammadi, Albert E. Cerussi, Paul D. Mannheimer
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Patent number: 10728646Abstract: An earbud may have a housing with an ear portion and an elongated out-of-ear portion that protrudes away from the ear portion. A speaker may be aligned with a speaker port in the ear portion and may emit sound for a user. Audio playback functions and other operations may be controlled using a controller in the earbud. The controller may gather capacitive sensor data and other data and may use this data in identifying an operating mode of the earbud. Using information such as whether the earbud is in an in-ear state or an out-of-ear state or other sensor data, the controller may take actions such as pausing or resuming audio playback or adjusting playback volume. The capacitive sensor data can be gathered using capacitive sensing electrodes located on the ear portion and the stalk portion of the earbud.Type: GrantFiled: March 22, 2018Date of Patent: July 28, 2020Assignee: Apple Inc.Inventors: Saeed Mohammadi, Tao Shui
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Publication number: 20200013946Abstract: A sensor is disclosed which includes a piezoelectric layer, a piezoresistive layer, one or more electrode layers coupled to the piezoelectric layer and to the piezoresistive layer, the piezoelectric layer configured to provide an electrical signal in response to application of a dynamic disturbance, and the piezoresistive layer configured to provide a change in resistivity in response to application of a static disturbance.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Applicant: Purdue Research FoundationInventors: Mukerrem Cakmak, Armen Yildirim, Rahim Rahimi, Saeed Mohammadi, Ali Shakouri
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Publication number: 20190297408Abstract: An earbud may have a housing with an ear portion and an elongated out-of-ear portion that protrudes away from the ear portion. A speaker may be aligned with a speaker port in the ear portion and may emit sound for a user. Audio playback functions and other operations may be controlled using a controller in the earbud. The controller may gather capacitive sensor data and other data and may use this data in identifying an operating mode of the earbud. Using information such as whether the earbud is in an in-ear state or an out-of-ear state or other sensor data, the controller may take actions such as pausing or resuming audio playback or adjusting playback volume. The capacitive sensor data can be gathered using capacitive sensing electrodes located on the ear portion and the stalk portion of the earbud.Type: ApplicationFiled: March 22, 2018Publication date: September 26, 2019Inventors: Saeed Mohammadi, Tao Shui
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Publication number: 20180306770Abstract: A biological sensing system, comprising a microelectrode array having a plurality of islands that are thermally isolated from each other and are interconnected by flexible nano-scale wires. An embedded complementary metal oxide semiconductor (CMOS) instrumentation amplifier and wireless communication circuitry may be operatively connected to the microelectrode array and embedded within input/output pads connected to the wires at the periphery of the array.Type: ApplicationFiled: November 16, 2017Publication date: October 25, 2018Inventors: Hossein Pajouhi, Saeed Mohammadi, Mojgan Sarmadi
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Patent number: 9190269Abstract: Illustrative embodiments of power amplifiers and associated methods are disclosed. In at least one embodiment, a method may include fabricating a power amplifier in a first silicon layer of a silicon-on-insulator (SOI) substrate, wherein the SOI substrate comprises the first silicon layer, a second silicon layer, and a buried oxide layer disposed between the first and second silicon layers; removing at least some of the second silicon layer from the SOI substrate, after fabricating the power amplifier; and securing the SOI substrate, after removing at least some of the second silicon layer, to an electrically non-conductive and thermally conductive substrate.Type: GrantFiled: March 12, 2013Date of Patent: November 17, 2015Assignee: PURDUE RESEARCH FOUNDATIONInventors: Saeed Mohammadi, Sultan R. Helmi, Jing-Hwa Chen, Hossein Pajouhi
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Patent number: 9188563Abstract: A perforated metal oxide semiconductor (MOS) structure for single biomolecule, virus, or single cell detection is disclosed. The structure includes a nanochannel formed through a sensing region configured to allow a solution containing particles to pass through the perforated MOS sensor. First and second terminals are configured to measure electrical parameters representative of change of electrical characteristics of the solution as the particle passes through the perforated MOS structure.Type: GrantFiled: September 26, 2014Date of Patent: November 17, 2015Assignee: PURDUE RESEARCH FOUNDATIONInventors: Saeed Mohammadi, Mojgan Sarmadi, Hossein Pajouhi
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Publication number: 20150083597Abstract: A perforated metal oxide semiconductor (MOS) structure for single biomolecule, virus, or single cell detection is disclosed. The structure includes a nanochannel formed through a sensing region configured to allow a solution containing particles to pass through the perforated MOS sensor. First and second terminals are configured to measure electrical parameters representative of change of electrical characteristics of the solution as the particle passes through the perforated MOS structure.Type: ApplicationFiled: September 26, 2014Publication date: March 26, 2015Applicant: Purdue Research FoundationInventors: Saeed Mohammadi, Mojgan Sarmadi, Hossein Pajouhi
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Patent number: 8907684Abstract: A method for forming a nanofluidic channel measuring system is disclosed. The method includes forming a first trench in a substrate, forming a second trench in the substrate, the first trench and the second trench are separated by a first width, providing a first conductor pad at a first location, providing a second conductor pad at a second location, forming a first nano-wire for coupling the first conductor pad with the second conductor pad, and forming a nano-channel through the first nano-wire, the nano-channel also coupling the first trench and the second trench, the nano-channel configured to sever the first nano-wire. A nanofluidic channel measuring system is also disclosed.Type: GrantFiled: January 29, 2010Date of Patent: December 9, 2014Assignee: Purdue Research FoundationInventors: Teimour Maleki, Babak Ziaie, Saeed Mohammadi
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Publication number: 20140203796Abstract: A silicon device, e.g., a nanoelectromechanical resonator, has a silicon substrate; an oxide layer having a trench therein; a silicon device layer over the oxide layer; and a nanowire disposed at least partly over the trench. Substantially no oxide or polysilicon is over the nanowire in the trench. A polyimide layer over the silicon device layer includes an opening over the trench. A silicon device can include silicon-on-insulator layers and at least one complementary metal-oxide semiconductor transistor in addition to a nanowire substantially suspended over a trench. A system for measurement of a nanoresonator includes an AC source in series with the nanoresonator to provide an electrical signal thereto at a selected first frequency. Electrode(s) adjacent to and spaced apart from the nanoresonator are driven by voltage source. A detector detects a current through the nanoresonator.Type: ApplicationFiled: August 16, 2013Publication date: July 24, 2014Applicant: Purdue Research FoundationInventors: Saeed Mohammadi, Hossein Pajouhi, Jeffrey Frederick Rhoads, Lin Yu
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Patent number: 8558619Abstract: Illustrative embodiments of power amplifiers are disclosed. In one embodiment, a power amplifier includes a plurality of transistors formed on a silicon-on-insulator (SOI) substrate such that the plurality of transistors are each electrically isolated from one another within the SOI substrate. The power amplifier also includes a plurality of biasing networks, each biasing network being configured to dynamically bias at least one of the plurality of transistors. The plurality of transistors are electrically coupled in a series stack, with an output of the power amplifier being provided across the series stack.Type: GrantFiled: January 4, 2013Date of Patent: October 15, 2013Assignee: Purdue Research FoundationInventors: Saeed Mohammadi, Sultan R. Helmi, Jing-Hwa Chen, Andrew J. Robison
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Patent number: 8368469Abstract: Illustrative embodiments of a power amplifier are disclosed which include a plurality of amplifier cells, each having an input and an output. The plurality of amplifier cells are formed on a semiconductor substrate such that the outputs of the plurality of amplifier cells are electrically coupled in series. Each of the plurality of amplifier cells may comprise a first transistor that is electrically insulated from the semiconductor substrate and a first feedback resistor configured to dynamically bias the first transistor.Type: GrantFiled: March 10, 2011Date of Patent: February 5, 2013Assignee: Purdue Research FoundationInventors: Saeed Mohammadi, Sultan R. Helmi, Jing-Hwa Chen, Andrew J. Robison
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Publication number: 20110285409Abstract: A method for forming a nanofluidic channel measuring system is disclosed. The method includes forming a first trench in a substrate, forming a second trench in the substrate, the first trench and the second trench are separated by a first width, providing a first conductor pad at a first location, providing a second conductor pad at a second location, forming a first nano-wire for coupling the first conductor pad with the second conductor pad, and forming a nano-channel through the first nano-wire, the nano-channel also coupling the first trench and the second trench, the nano-channel configured to sever the first nano-wire. A nanofluidic channel measuring system is also disclosed.Type: ApplicationFiled: January 29, 2010Publication date: November 24, 2011Inventors: Teimour Maleki, Babak Ziaie, Saeed Mohammadi