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公开(公告)号：US20240291500A1
公开(公告)日：2024-08-29
申请号：US18584598
申请日：2024-02-22
Inventor： Jung Hyup LEE , Tae Ryoung SEOL , Ji Woong CHOI
Abstract: The present invention relates to a current-to-digital converter and the current-to-digital converter according to an example embodiment includes an integrator connected to a current source that outputs input current; a quantizer connected to the integrator and configured to generate a first digital output code corresponding to alternating current (AC) in the input current; a first loop circuit formed on a delta-sigma (ΔΣ) loop that connects an input terminal of the integrator and an output terminal of the quantizer; a second loop circuit formed on a truncation-noise-shaped baseline-servo (TNS-BS) loop that connects the input terminal of the integrator and the output terminal of the quantizer and configured to generate a second digital output code corresponding to direct current (DC) in the input current; and an adder configured to generate a final digital output code by adding the first digital output code and the second digital output code.
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2.发明申请公开(公告)号：US20240380615A1
公开(公告)日：2024-11-14
申请号：US18032610
申请日：2022-09-16
Applicant: DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY , RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
Inventor： Woo Jin JEON , Dong Hyeon YU , Hsu RUEI-HAU , Je Min LEE , Ji Woong CHOI
Abstract: An IoT device according to an embodiment encrypts IoT data using a peripheral device and transmits the IoT data to a server, and a user device requests and obtains necessary IoT data from the server, thereby achieving real-time IoT data sharing. The IoT device performs only relatively low-performance operation of attribute-based encryption to encrypt IoT data collected through a sensor and outsources the remaining high-performance operations of attribute-based encryption to the peripheral device providing external communication network connection to the IoT device to generate a final ciphertext. A user device generates an attribute bloom filter using an access policy thereof, requests and obtains IoT data encrypted according to attribute-based encryption. A cloud server receives and stores IoT data encrypted by the IoT device and the peripheral device according to attribute-based encryption and transmits IoT data retrieved using the attribute bloom filter as a query to the user device.
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Patent Agency Ranking
公开(公告)号：US20230261671A1
公开(公告)日：2023-08-17
申请号：US18168882
申请日：2023-02-14
Inventor： Jung Hyup LEE , Ji Woong CHOI , Se Hwan LEE
IPC: H03M3/00
CPC classification number: H03M3/484
Abstract: Disclosed are a continuous-time delta-sigma analog-to-digital converter and an operation method thereof. More particularly, a continuous-time delta-sigma analog-to-digital converter, including: a linear integrator configured to generate a first output signal corresponding to a preset input voltage based on an operation of a linear Gm circuit that receives the preset input voltage; and a quantizer configured to generate a second output signal corresponding to the first output signal based on an operation of a body-driven VCO that receives the first output signal and to generate a digital output code corresponding to the second output signal based on an operation of a Frequency to Digital Converter (FDC) that receives the second output signal is disclosed.
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公开(公告)号：US20230375502A1
公开(公告)日：2023-11-23
申请号：US18120771
申请日：2023-03-13
Inventor： Ji Woong CHOI , Seong Tak Kang , Yong Seok Oh , Jeong Rak Park , Yun Ho Jeong
IPC: G01N27/416 , G01N27/48 , G01N33/94
CPC classification number: G01N27/4163 , G01N27/48 , G01N33/9413 , A61B5/14546
Abstract: Disclosed is a technology of extracting faradaic current-type Second-Derivative-based Background Removal (SDBR) data, from which a capacitive charge current is subtracted, through the second derivative after background subtraction of FSCV data and providing a neurotransmitter concentration measurement result based on the extracted SDBR data. More particularly, a neurotransmitter concentration measuring apparatus according to an embodiment of the present disclosure includes a data collector configured to collect Fast-Scan Cyclic Voltammetry (FSCV) data in which a capacitive charge current is reflected in a faradaic current that changes according to neurotransmitter injection; a data processor configured to process the FSCV data as the faradaic current-type Second-Derivative-based Background Removal (SDBR) data, from which the capacitive charge current is subtracted, based on the second derivative for a voltage of an individual voltammogram generated for each scan by background subtraction in the FSCV data; and a measurement result provider configured to provide a concentration measurement result of a neurotransmitter that changes according to the neurotransmitter injection based on the SDBR data.
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公开(公告)号：US20220182399A1
公开(公告)日：2022-06-09
申请号：US17395121
申请日：2021-08-05
Inventor： Ji Woong CHOI , Woo Jin JEONG , Eun Min CHOI
Abstract: A method of detecting a malicious node in a bus network system includes pre-storing, by a receiving node, autocorrelation characteristics and node identifiers for each signal received from nodes excluding than the receiving node in a bus network system, receiving, by the receiving node, a target signal from any one of the nodes, generating, by the receiving node, an autocorrelation characteristic of the target signal, searching for an autocorrelation characteristic, which is identical to the autocorrelation characteristic of the target signal or similar to the autocorrelation characteristic of the target signal by a reference level or more, among the autocorrelation characteristics of each of the signals stored by the receiving node, determining, by the receiving node, whether a first node identifier matching the searched autocorrelation characteristic and a second node identifier extracted from a packet transmitted to the target signal are the same.
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公开(公告)号：US20240296962A1
公开(公告)日：2024-09-05
申请号：US18594719
申请日：2024-03-04
Inventor： Ji Woong CHOI , Seong Tak Kang , Yun Ho Jeong , Eun Ho Kim
IPC: G16H50/70
CPC classification number: G16H50/70
Abstract: A neurotransmitter concentration measuring apparatus includes a data collecting unit configured to collect fast-scan cyclic voltammetry (FSCV) data where capacitive charging current is included in faradaic current varying depending on injection concentration for each of multiple neurotransmitters, a data processing unit configured to process the FSCV data as second-derivative-based background removal (SDBR) data in a faradaic current form where the charging current is excluded, based on a second derivative for voltage of an individual voltammogram generated for each scan by background subtraction in the FSCV data, a deep learning processing unit configured to build a deep learning model that simultaneously estimates the concentration of the multiple neurotransmitters by learning the SDBR data with a deep learning network and a measurement result providing unit configured to simultaneously provide concentration measurement results of a neurotransmitter varying depending on real-time injection for each of the multiple neurotransmitters based on the learning model.
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公开(公告)号：US20170084992A1
公开(公告)日：2017-03-23
申请号：US15311415
申请日：2015-03-16
Inventor： Ji Woong CHOI , Jae Eun JANG , Han Joon KIM , Jin Ho PARK , Kyoung Sub OH
CPC classification number: H01Q1/526 , H01Q1/2291 , H01Q1/243 , H01Q7/00 , H04B5/0031 , H04B5/0037 , H04B5/0087
Abstract: A short-range magnetic field system according to an embodiment includes a transmission antenna part located at a transmission port; and a reception antenna part located at a reception port to face the transmission antenna part. wherein a magnetic field formed around the transmission antenna part or the reception antenna part can be offset.
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