Patents by Inventor Dejan Markovic
Dejan Markovic 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: 11653170Abstract: In one embodiment, a method for emitting a sound from an in-ear speaker worn by a subject includes generating, by an audio source of the in-ear speaker, a source audio signal. One or more speakers of the in-ear speaker may emit a sound based on the audio signal and an audio-transport tube of the in-ear speaker may receive the sound. The one or more speakers may be comprised of a singular speaker or a speaker array coupled to a crossover network. The audio-transport tube has an input end coupled to the one or more speakers to receive the sound. An audio reflector of the in-ear speaker may reflect the sound. The audio reflector is coupled to an output end of the audio-transport tube.Type: GrantFiled: August 14, 2020Date of Patent: May 16, 2023Assignee: Meta Platforms Technologies, LLCInventors: Nicholas Pourazima, Israel Dejene Gebru, Dejan Markovic, James White, Steven Krenn, Matthew Stewart
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Patent number: 11387685Abstract: Biomedical implants in accordance with various embodiments of the invention can be implemented in many different ways. The implants can be configured to receive power and transmit data, both wirelessly and simultaneously. Such devices can be configured to receive power from an external source and transmit data, such as but not limited to recorded neural data and/or other biological data, to outside the body. In many cases, the data is transmitted to the device that delivers power to the implant. For example, the power and data transmission system can be implemented with a pair of transceivers. The implant transceiver can receive power wirelessly though an external transceiver while simultaneously transmitting data to the external transceiver. In several embodiments, both forward (power) and reverse (data) links use the same pair of inductive coils in the transceivers, one coil mounted in the implant and the other in the external unit.Type: GrantFiled: August 14, 2018Date of Patent: July 12, 2022Assignee: The Regents of the University of CaliforniaInventors: Jiacheng Pan, Asad A. Abidi, Dejan Markovic
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Patent number: 11311728Abstract: Many embodiments of the invention provide a neuromodulation system that includes a digital control unit (DCU) that activates a stimulation engine during active stimulation, a current mirror that includes two feedback loops including a first feedback loop with positive feedback (PF) made of an error amplifier A1 and transistors M3 and M1 and a second feedback loop with a negative feedback (NF) made of the error amplifier A1 and transistor M3, and a high-voltage adaptive rail (Vdd/Vss) to accommodate voltage drops across high electrode impedances.Type: GrantFiled: January 22, 2018Date of Patent: April 26, 2022Assignee: The Regents of the University of CaliforniaInventors: Dejan Rozgic, Dejan Markovic
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Patent number: 11259138Abstract: In one embodiment, a method for determining a dynamic head-related transfer function for a subject includes receiving audio recordings of a sound captured by audio sensors. The sound is emitted by an in-ear speaker worn by the subject. Additionally, a reference signal captured by a microphone coupled to the in-ear speaker and one or more images captured by image sensors are received. The one or more images depict a body pose of the subject while the sound is emitted by the in-ear speaker and may be used to generate a pose representation of the body pose of the subject. A head-related transfer function for each audio sensor is determined based on the pose representation, the audio recordings of the sound, and the reference signal. The dynamic head-related transfer function is determined based on the head-related transfer function for each audio sensor.Type: GrantFiled: August 14, 2020Date of Patent: February 22, 2022Assignee: Facebook Technologies, LLC.Inventors: Nicholas Pourazima, Israel Dejene Gebru, Dejan Markovic, James White, Steven Krenn, Matthew Stewart
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Publication number: 20210297803Abstract: In one embodiment, a method for determining a dynamic head-related transfer function for a subject includes receiving audio recordings of a sound captured by audio sensors. The sound is emitted by an in-ear speaker worn by the subject. Additionally, a reference signal captured by a microphone coupled to the in-ear speaker and one or more images captured by image sensors are received. The one or more images depict a body pose of the subject while the sound is emitted by the in-ear speaker and may be used to generate a pose representation of the body pose of the subject. A head-related transfer function for each audio sensor is determined based on the pose representation, the audio recordings of the sound, and the reference signal. The dynamic head-related transfer function is determined based on the head-related transfer function for each audio sensor.Type: ApplicationFiled: August 14, 2020Publication date: September 23, 2021Inventors: Nicholas Pourazima, Israel Dejene Gebru, Dejan Markovic, James White, Steven Krenn, Matthew Stewart
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Publication number: 20210297763Abstract: In one embodiment, a method for emitting a sound from an in-ear speaker worn by a subject includes generating, by an audio source of the in-ear speaker, a source audio signal. One or more speakers of the in-ear speaker may emit a sound based on the audio signal and an audio-transport tube of the in-ear speaker may receive the sound. The one or more speakers may be comprised of a singular speaker or a speaker array coupled to a crossover network. The audio-transport tube has an input end coupled to the one or more speakers to receive the sound. An audio reflector of the in-ear speaker may reflect the sound. The audio reflector is coupled to an output end of the audio-transport tube.Type: ApplicationFiled: August 14, 2020Publication date: September 23, 2021Inventors: Nicholas Pourazima, Israel Dejene Gebru, Dejan Markovic, James White, Steven Krenn, Matthew Stewart
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Patent number: 11063637Abstract: Systems and methods for using near-field inductive coupling between an implanted system and an external transceiver are discloses. In several embodiments, the data link system is based on a free-running oscillator tuned by coupled resonators. The use of an oscillator-based power link can allow for stable power over different inductor distances, or coil distances. In some embodiments, the data link system includes receivers on both sides of the link, where each receiver is composed of a detector, such as but not limited to an analog front-end (“AFE”), and a clock and data recovery (“CDR”) loop.Type: GrantFiled: May 9, 2018Date of Patent: July 13, 2021Assignee: The Regents of the University of CaliforniaInventors: Alireza Yousefi, Asad A. Abidi, Dejan Markovic
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Patent number: 11043843Abstract: Many embodiments provide an implant power management unit (IPMU) that includes a reconfigurable active rectifier (AR) for wireless power transfer (WPT), where the AR is configurable to operate in a plurality of different modes of operation, an adaptive load control (ALC) unit that accommodates power delivery with load requirements, where the ALC unit is configured to control AR voltage based upon a desired value, control circuitry that is configured to enable a full bridge rectifier in a regular mode of operation of the AR, a feedback circuit that adaptively generates offset current to compensate for switch delays in at least one active NMOS diode, and a feedback circuit that adaptively generates offset current to compensate switch delays in at least one active PMOS diode.Type: GrantFiled: January 22, 2018Date of Patent: June 22, 2021Assignee: The Regents of the University of CaliforniaInventors: Dejan Rozgic, Dejan Markovic
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Patent number: 11025215Abstract: Neuromodulation systems in accordance with embodiments of the invention can use a feed-forward common-mode cancellation (CMC) path to attenuate common-mode (CM) artifacts appearing at a voltage input, thus allowing for the simultaneous recording of neural data and stimulation of neurons. In several embodiments of the invention, the feed-forward CMC path is utilized to attenuate the common-mode swings at Vin,CM, which can restore the linear operation of the front-end for differential signals. In several embodiments, the neuromodulation system may utilize an anti-alias filter (AAF) that includes a duty-cycles resistor (DCR) switching at a first frequency f1, followed by a DCR switching at a second frequency f2. The AAF allows for a significantly reduced second frequency f2 that enables the multi-rate DCR to increase the maximum realizable resistance, which is dependent upon the frequency ratio f1/f2.Type: GrantFiled: December 7, 2017Date of Patent: June 1, 2021Assignee: The Regents of the University of CaliforniaInventors: Hariprasad Chandrakumar, Dejan Markovic
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Patent number: 10980487Abstract: System and methods that cancel artifacts of stimulation signals from neural signals are disclosed. In several embodiments, the systems and methods determine a threshold value for the neural signal in the absence of artifacts. The threshold value can then be used to detect an artifact in received neural signals. In a number of embodiments, a template can be used to cancel an artifact from a neural signal in response to the neural signal being greater than the threshold value.Type: GrantFiled: May 31, 2017Date of Patent: April 20, 2021Assignee: The Regents of the University of CaliforniaInventors: Dejan Markovic, Ali H. Sayed, Sina Basir-Kazeruni, Stefan Vlaski, Hawraa Salami
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Patent number: 10925503Abstract: Signal recording sensor systems in accordance with embodiments of the invention include sensors capable of sensing and capturing electrophysiological signals in the presence of interference signals, an analog front-end including circuitry configured to record electrophysiological input signals as a voltage, and an analog to digital converter including a voltage-controlled-oscillator configured to convert the recorded analog electrophysiological input signal to a phase output. While such signal recording sensor systems can be used in the recording of biosignals and/or electrophysiological signals generated from living organisms, signal recording sensor systems in accordance with embodiments of the invention are not limited to recording biosignals and/or electrophysiological signals.Type: GrantFiled: November 19, 2014Date of Patent: February 23, 2021Assignee: The Regents of the University of CaliforniaInventors: Vaibhav Karkare, Dejan Markovic
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Patent number: 10778165Abstract: A high dynamic range sensing front-end for bio-signal recording systems in accordance with embodiments of the invention are disclosed. In one embodiment, a bio-signal amplifier includes an input signal, where the input signal is modulated to a predetermined chopping frequency, a first amplifier stage, a parallel-RC circuit connected to the first amplifier stage and configured to generate a parallel-RC circuit output by selectively blocking an offset current, a second amplifier stage connected to the parallel-RC circuit that includes a second input configured to receive the parallel-RC circuit output and generate a second output that is an amplified version of the input signal with ripple-rejection. Further, the bio-signal amplifier can also include an auxiliary path configured for boosting input impedance by pre-charging at least one input capacitor. In addition, the bio-signal amplifier can also include a DC-servo feedback loop that includes an integrator that utilizes a duty-cycled resistor.Type: GrantFiled: September 30, 2015Date of Patent: September 15, 2020Assignee: The Regents of the University of CaliforniaInventors: Hariprasad Chandrakumar, Dejan Markovic
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Publication number: 20200220392Abstract: Biomedical implants in accordance with various embodiments of the invention can be implemented in many different ways. The implants can be configured to receive power and transmit data, both wirelessly and simultaneously. Such devices can be configured to receive power from an external source and transmit data, such as but not limited to recorded neural data and/or other biological data, to outside the body. In many cases, the data is transmitted to the device that delivers power to the implant. For example, the power and data transmission system can be implemented with a pair of transceivers. The implant transceiver can receive power wirelessly though an external transceiver while simultaneously transmitting data to the external transceiver. In several embodiments, both forward (power) and reverse (data) links use the same pair of inductive coils in the transceivers, one coil mounted in the implant and the other in the external unit.Type: ApplicationFiled: August 14, 2018Publication date: July 9, 2020Applicant: The Regents of the University of CaliforniaInventors: Jiacheng Pan, Asad A. Abidi, Dejan Markovic
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Publication number: 20200186201Abstract: Systems and methods for using near-field inductive coupling between an implanted system and an external transceiver are discloses. In several embodiments, the data link system is based on a free-running oscillator tuned by coupled resonators. The use of an oscillator-based power link can allow for stable power over different inductor distances, or coil distances. In some embodiments, the data link system includes receivers on both sides of the link, where each receiver is composed of a detector, such as but not limited to an analog front-end (“AFE”), and a clock and data recovery (“CDR”) loop.Type: ApplicationFiled: May 9, 2018Publication date: June 11, 2020Applicant: The Regents of the University of CaliforniaInventors: Alireza Yousefi, Asad A. Abidi, Dejan Markovic
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Publication number: 20200099352Abstract: Neuromodulation systems in accordance with embodiments of the invention can use a feed-forward common-mode cancellation (CMC) path to attenuate common-mode (CM) artifacts appearing at a voltage input, thus allowing for the simultaneous recording of neural data and stimulation of neurons. In several embodiments of the invention, the feed-forward CMC path is utilized to attenuate the common-mode swings at Vin,CM, which can restore the linear operation of the front-end for differential signals. In several embodiments, the neuromodulation system may utilize an anti-alias filter (AAF) that includes a duty-cycles resistor (DCR) switching at a first frequency f1, followed by a DCR switching at a second frequency f2. The AAF allows for a significantly reduced second frequency f2 that enables the multi-rate DCR to increase the maximum realizable resistance, which is dependent upon the frequency ratio f1/f2.Type: ApplicationFiled: December 7, 2017Publication date: March 26, 2020Applicant: The Regents of the University of CaliforniaInventors: Hariprasad Chandrakumar, Dejan Markovic
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Publication number: 20190381316Abstract: Many embodiments of the invention provide a neuromoduation system that includes a digital control unit (DCU) that activates a stimulation engine during active stimulation, a current mirror that includes two feedback loops including a first feedback loop with positive feedback (PF) made of an error amplifier A1 and transistors M3 and M1 and a second feedback loop with a negative feedback (NF) made of the error amplifier A1 and transistor M3, and a high-voltage adaptive rail (Vdd/Vss) to accommodate voltage drops across high electrode impedances.Type: ApplicationFiled: January 22, 2018Publication date: December 19, 2019Applicant: The Regents of the University of CaliforniaInventors: Dejan Rozgic, Dejan Markovic
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Publication number: 20190379239Abstract: Many embodiments provide an implant power management unit (IPMU) that includes a reconfigurable active rectifier (AR) for wireless power transfer (WPT), where the AR is configurable to operate in a plurality of different modes of operation, an adaptive load control (ALC) unit that accommodates power delivery with load requirements, where the ALC unit is configured to control AR voltage based upon a desired value, control circuitry that is configured to enable a full bridge rectifier in a regular mode of operation of the AR, a feedback circuit that adaptively generates offset current to compensate for switch delays in at least one active NMOS diode, and a feedback circuit that adaptively generates offset current to compensate switch delays in at least one active PMOS diode.Type: ApplicationFiled: January 22, 2018Publication date: December 12, 2019Applicant: The Regents of the University of CaliforniaInventors: Dejan Rozgic, Dejan Markovic
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Patent number: 10397345Abstract: Methods and systems for location-based asset sharing are provided. In an embodiment, a method stores a publication in a data store accessible by a server system, the publication including a publication location and a distance restriction. The method receives a request for the asset and then determines, by the server system, to provide the asset in response to the request. The determining is based on a requesting location associated with the request, the publication location, and the distance restriction, wherein according to the distance restriction, the asset is only provided to the requesting location if a distance from the requesting location to the publication location satisfies a specified relationship. The method provides the asset in response to the request. In another embodiment, the publication includes references to one or more assets being shared by a publisher. Another method creates an asset-listener association in response to a received asset association request.Type: GrantFiled: August 21, 2013Date of Patent: August 27, 2019Assignee: Adobe Inc.Inventors: David Chung Wu Hwu, Dejan Markovic
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Patent number: 10363420Abstract: Systems and methods for restoring cognitive function are disclosed. In some implementations, a method includes, at a computing device, separately stimulating one or more of lateral and medial entorhinal afferents and other structures connecting to a hippocampus of an animal subject in accordance with a plurality of predefined stimulation patterns, thereby attempting to restore object-specific memories and location-specific memories; collecting a plurality of one or more of macro- and micro-recordings of the stimulation of hippocampalentorhinal cortical (HEC) system; and refining the computational model for restoring individual memories in accordance with a portion of the plurality of one or more of macro- and micro-recordings.Type: GrantFiled: June 9, 2015Date of Patent: July 30, 2019Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Itzhak Fried, Dejan Markovic, Nanthia Suthana
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Patent number: 10355192Abstract: Thermoelectric energy harvesting systems in accordance with embodiments of the invention enable energy harvesting. One embodiment includes a thermoelectric energy harvesting (TEH) system comprising a TEH comprising a thin-film array-based TEH source; start-up mode circuitry comprising: an upper branch comprising: a mode switch configured to allow selection of the upper branch; an inductive-load ring oscillator (ILRO); a charge pump configured to receive an input from the ILRO and output current, where output current is utilized to charge an upper branch capacitor; a lower branch comprising: an inductor; an active diode configured to transfer energy stored in the inductor to an output capacitor; maximum-power-point tracking (MPPT) mode circuitry, where the MPPT loop comprises: a mode control unit; a gate controller; a clock generator configured to generate at least one control signal; an analog-domain MPPT unit configured to receive the at least one generated control signal.Type: GrantFiled: November 6, 2015Date of Patent: July 16, 2019Assignee: The Regents of the University of CaliforniaInventors: Dejan Rozgic, Dejan Markovic