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公开(公告)号：US11205900B2
公开(公告)日：2021-12-21
申请号：US16663840
申请日：2019-10-25
发明人： Chisung Bae
摘要： A microelectronic device includes: a photovoltaic module configured to convert a light energy into an electric energy; a converter configured to convert a voltage output from the photovoltaic module into a predetermined voltage; a capacitor configured to store an electric energy transferred from the converter; and a controller configured to predict an available current of a next time slot based on the electric energy stored in the capacitor, and determine a consumed current of a load system of the next time slot based on the predicted available current.
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公开(公告)号：US10154818B2
公开(公告)日：2018-12-18
申请号：US14884004
申请日：2015-10-15
发明人： Chao Zhang , Xuetao Feng , Yang Liu , Chisung Bae , Sang-joon Kim
IPC分类号： A61B5/0205 , A61B5/00 , A61B5/117 , G07C9/00
摘要： A biometric authentication apparatus and method are provided. The biometric authentication apparatus may obtain at least two types of biosignals, extract a same type of physiological features from each of the biosignals, and determine whether the biosignals are generated from a same living body based on the extracted same type of physiological features.
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公开(公告)号：US10130307B2
公开(公告)日：2018-11-20
申请号：US15371454
申请日：2016-12-07
发明人： Yang Liu , Xuetao Feng , Chao Zhang , Chisung Bae , Sang-joon Kim
IPC分类号： A61B5/04 , A61B5/00 , A61B5/044 , A61B5/0452 , A61B5/117
摘要： Disclosed are an electrocardiogram (ECG) authentication method and apparatus, and a training method and apparatus for training a neural network model used for ECG authentication, the ECG authentication apparatus being configured to acquire an ECG signal of a subject, extract a semantic feature of the ECG signal, and authenticate the subject based on the extracted semantic feature.
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4.发明授权公开(公告)号：US11831239B2
公开(公告)日：2023-11-28
申请号：US17873663
申请日：2022-07-26
发明人： Seong Joong Kim , Chisung Bae , Hankyu Lee
CPC分类号： H02M3/07 , H03L7/06 , G11C27/026
摘要： A current stimulator includes a first current generation circuit configured to generate a first current, injectable into a cranial nerve cell, through a current mirroring based on a plurality of transistor pairs; and a second current generation circuit, driven by a clock, configured to generate a second current smaller than the first current by controlling a charge rate based on a voltage difference between terminals of a capacitor. A first output impedance of the first current generation circuit and a second output impedance of the second current generation circuit have a magnitude greater than or equal to a predetermined ratio to a load impedance corresponding to the cranial nerve cell.
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公开(公告)号：US10791947B2
公开(公告)日：2020-10-06
申请号：US15868665
申请日：2018-01-11
发明人： Zhang Chao , Liu Yang , Chisung Bae , Sang Joon Kim , Liu Haixiao
IPC分类号： A61B5/04 , A61B5/0402
摘要： A method to update reference verification information used for electrocardiogram (ECG) signal verification includes: identifying a first ECG signal measured from a user; verifying the first ECG signal by comparing a second ECG signal included in a reference ECG signal set with the first ECG signal; in response to the first ECG signal being successfully verified, setting the successfully verified first ECG signal to be a third ECG signal, and adding the third ECG signal to a verified ECG signal set; and updating the reference ECG signal set by setting the third ECG signal added to the verified ECG signal set to be an additional second ECG signal, based on the reference ECG signal set and the verified ECG signal set.
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公开(公告)号：US10188351B2
公开(公告)日：2019-01-29
申请号：US15246712
申请日：2016-08-25
发明人： Chisung Bae , Jin Woo Shin , Sung-Soo Ahn , Sang Joon Kim
IPC分类号： A61B5/117 , A61B5/00 , A61B5/0452 , G06F21/32 , G06K9/00
摘要： An authentication apparatus includes one or more processors configured to temporally implement a neural network, used to extract a feature value from hidden nodes, that is connected to input nodes to which an electrocardiogram (ECG) signal is input so as to share a weight set with the input nodes, and to match the ECG signal and the extracted feature value to a user for registration.
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公开(公告)号：US20180212610A1
公开(公告)日：2018-07-26
申请号：US15834342
申请日：2017-12-07
发明人： Chisung Bae , Sangjoon Kim , Yoonmyung Lee , Jaehong Jung , Jung-Hoon Chun
摘要： An oscillator using a supply regulation loop and a method of operating the oscillator are provided. The oscillator includes a reference voltage generator configured to generate reference voltages from a supply voltage, a supply regulation loop circuit including a first operational amplifier and a transistor, the first operational amplifier being configured to receive a first reference voltage of the reference voltages, and the transistor being connected to an output terminal of the first operational amplifier, and a frequency locked loop (FLL) circuit configured to generate a clock signal, based on an input voltage determined based on a current flowing in the transistor and a second reference voltage of the reference voltages, wherein the first operational amplifier may include an input terminal configured to receive the first reference voltage and to receive negative feedback from the transistor, and the output terminal being configured to generate an output voltage independent of noise of the supply voltage.
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公开(公告)号：US11784608B2
公开(公告)日：2023-10-10
申请号：US17506878
申请日：2021-10-21
发明人： Chisung Bae
CPC分类号： H02S50/10 , H02J3/38 , H02J3/388 , H02J7/35 , H02J50/30 , H02S40/32 , H02S40/38 , A61B5/6847 , H02J7/345
摘要： A microelectronic device includes: a photovoltaic module configured to convert a light energy into an electric energy; a converter configured to convert a voltage output from the photovoltaic module into a predetermined voltage; a capacitor configured to store an electric energy transferred from the converter; and a controller configured to predict an available current of a next time slot based on the electric energy stored in the capacitor, and determine a consumed current of a load system of the next time slot based on the predicted available current.
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公开(公告)号：US11513548B2
公开(公告)日：2022-11-29
申请号：US17200017
申请日：2021-03-12
发明人： Chisung Bae , Hyungmin Gi , Yeohoon Yoon , Yoonmyung Lee
摘要： An apparatus and method for tracking maximum power are disclosed. The apparatus is configured to track a maximum power at a certain node of an electronic circuit, adjust an impedance of the electronic circuit such that power at the node is maximal, and adjust an impedance of the electronic circuit by comparing power at two points in time to increase power. The apparatus for tracking a maximum power, includes a charge sharing capacitor connected to an initial capacitor in parallel, a first switch disposed between the initial capacitor and an energy harvesting power supply, a second switch disposed between the initial capacitor and the charge sharing capacitor, a third switch disposed between the energy harvesting power supply and a comparator, and a switched-capacitor power converting circuit configured to control the initial capacitor.
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公开(公告)号：US11064949B2
公开(公告)日：2021-07-20
申请号：US15485295
申请日：2017-04-12
发明人： Chisung Bae , Jinhyun Yun , Sang Joon Kim
摘要： A method and an apparatus to remove a noise from an electrocardiography (ECG) sensor signal are provided. A noise removing method includes: receiving a sensor signal collected by an electrocardiography (ECG) sensor; extracting an ECG estimation signal from the sensor signal based on a peak value of the sensor signal; determining a first comparison value between the ECG estimation signal and a first reference signal indicating an average form of ECG signals; and classifying the ECG estimation signal as one of an ECG signal and a noise by comparing the first comparison value to a first threshold value.
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