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公开(公告)号：US20230009325A1
公开(公告)日：2023-01-12
申请号：US17825586
申请日：2022-05-26
Inventor： Hyung-Min LEE , HYUN-SU LEE
Abstract: Provided is a back-data transmission circuit generating a sensing signal using an arbitrary sensor, generating an input signal by digitally converting the sensing signal, generating a modulation signal by performing a modulation operation when there is a change in the input signal, inducing the modulation signal and transmitting the modulation signal to the transmitting terminal, measuring an induction signal induced from a receiving terminal to the transmitting terminal, and generating an output signal by calculating a slope of a voltage change represented by the induction signal.
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公开(公告)号：US20250125742A1
公开(公告)日：2025-04-17
申请号：US18909716
申请日：2024-10-08
Inventor： Hyung-Min LEE , Hyun-Su LEE
Abstract: The present disclosure relates to a resonant regulating rectifier, including an input unit that receives wireless power; and a resonant regulating rectification unit that modulates and rectifies a voltage level of the wireless power based on PWM according to a first demand voltage of a first load and a second demand voltage of a second load to apply a first target voltage to the first load through a first output transistor, and apply a second target voltage to the second load through a second output transistor. This may allow another output to be generated by utilizing a section wasted in a PWM method that modulates a voltage width, thereby reducing wasted energy.
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公开(公告)号：US20230010500A1
公开(公告)日：2023-01-12
申请号：US17825605
申请日：2022-05-26
Inventor： Hyung-Min LEE , Kyeongho EOM , Han-Sol LEE , Minju PARK
Abstract: Provided is a switched capacitor-based electrical stimulation device which supplies a direct current (DC) power, detects a charging voltage charged in any one of a plurality of capacitors, controls the DC power supplied to a capacitor module to repeat a charging level and a resting level according to a charging pattern when the charging voltage is lower than a target voltage, and outputs an electric current to electrodes which contact a human body based on an output pattern.
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公开(公告)号：US20210111762A1
公开(公告)日：2021-04-15
申请号：US17006991
申请日：2020-08-31
Inventor： Hyung-Min LEE , Minjae KIM
Abstract: A device for low-power bidirectional wireless data telemetry includes: a coil unit configured to perform forward telemetry and back telemetry; a full-wave rectifier unit configured to convert an AC voltage into a DC voltage; a current modulator configured to change a magnetic field by altering a path of the AC current generated, when the back telemetry is performed; an energy storage configured to generate a reuse power using the AC current; and a LDO unit configured to generate a source voltage using the power output from the full-wave rectifier unit and the reuse power generated by the energy storage. Accordingly, since the back telemetry and the forward telemetry may be performed simultaneously and the wasted current is reused, the power required for back telemetry may be reduced.
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公开(公告)号：US20230011215A1
公开(公告)日：2023-01-12
申请号：US17825574
申请日：2022-05-26
Inventor： Hyung-Min LEE , Minil KANG , Min-Seong UM
IPC: G06N3/063
Abstract: Provided is a neuromorphic circuit including an input module configured to generate an input voltage, an output module configured to measure a current transmitted from the input module and generate an output voltage, synapse modules configured to electrically connect the input module and the output module and determine a current to be transmitted to the output module and including a memory element to which a weight is assigned, and a crossing module configured to control a direction of current flowing through the synapse modules.
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Patent Agency Ranking
公开(公告)号：US20210335277A1
公开(公告)日：2021-10-28
申请号：US17232061
申请日：2021-04-15
Inventor： Young-Soo HWANG , Joon-Chul GOH , Oh Jo KWON , Ki-Duk KIM , Jeongmin KIM , Bong Hyun YOU , Hyung-Min LEE , Seung Hun CHOI
IPC: G09G3/3275
Abstract: A data driver includes a gamma voltage generator configured to generate gamma voltages based on a number of data bits of a pixel data; a first digital-to-analog block configured to generate a plurality of time-division gamma voltage signals respectively corresponding to a plurality of gamma voltage groups; a plurality of time-division gamma voltage line groups for transferring the plurality of time-division gamma voltage signals; a second digital-to-analog block configured to select a time-division gamma voltage signal among the time-division gamma voltage signals according to upper bits of the pixel data in each channel; a time-division gamma voltage select block configured to select a gamma voltage according to lower bits of the pixel data in each channel; and an output buffer block configured to output the selected gamma voltage in each channel.
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公开(公告)号：US20190319632A1
公开(公告)日：2019-10-17
申请号：US16363316
申请日：2019-03-25
Inventor： Hyung-Min LEE , Duckhoon RO , Kyung-Soo JEONG
Abstract: The present disclosure relates to a radiation-hardened analog-to-digital converter circuit and its digital signal calibration method capable of efficiently compensating for an external influence or a changed semiconductor element performance, and a recording medium for performing the method.
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公开(公告)号：US20230181927A1
公开(公告)日：2023-06-15
申请号：US18078471
申请日：2022-12-09
Inventor： Hyung-Min LEE , Seong-Woo KIM , Kyeongho EOM
CPC classification number: A61N5/0622 , A61N5/0601 , A61F2/14 , A61N2005/0626 , A61N2005/0652
Abstract: Disclosed herein is a sub-retinal prosthesis using a multi-photodiode sensing technology. The sub-retinal prosthesis using a multi-photodiode sensing technology includes: a pixel array including a plurality of pixels of which k pixels are set as a unit group; and a digital controller controlling the pixel array to activate one of the k pixels as a stimulation electrode and activate the other k-1 pixels as return electrodes, wherein the unit group includes k photodiodes, a sensing circuit and a current driver, the sensing circuit outputs a stimulation parameter using currents each generated by the k photodiodes according to irradiation of light as an input, and the current driver outputs a stimulation current corresponding to the stimulation parameter.
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公开(公告)号：US20230085353A1
公开(公告)日：2023-03-16
申请号：US17885848
申请日：2022-08-11
Inventor： Hyung-Min LEE , Hyun Jun PARK
Abstract: A capacitor-less low dropout regulator includes: a capacitor-less dual feedback loop unit including a plurality of feedback resistors, an error amplifier, and a transconductance cell to form a main loop passing through the error amplifier and a sub-loop passing through the gm cell without passing through the error amplifier; a dynamic compensation unit connected to a first main pole located at an output of the error amplifier and a second main pole located at an output of the gm cell to provide dynamic frequency compensation using a Miller effect to the first main pole and the second main pole according to a load current of the capacitor-less dual feedback loop unit; and a load current measurement unit configured to measure a load current of a third main pole formed at a load of the dual feedback loop unit to provide the load current to the dynamic compensation unit.
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公开(公告)号：US20230041306A1
公开(公告)日：2023-02-09
申请号：US17851696
申请日：2022-06-28
Inventor： Hyung-Min LEE , Minil KANG , Min-Seong UM
Abstract: An error compensation circuit for analog capacitor memory circuits includes a first transistor and a second transistor with gates connected respectively to top and bottom of an analog memory capacitor to read a voltage charged in the analog memory capacitor; a first switch and a second switch connected respectively to the first transistor and the second transistor to select the voltage to read; a first capacitor and a second capacitor to charge an electric charge to compensate or refresh the analog memory capacitor according to on/off of the first switch and the second switch; and an input terminal connected to sources of the first transistor and the second transistor to apply the voltage to operate the circuit. Accordingly, it is possible to compensate for an unintended phenomenon of the analog capacitor memory or refresh a change in memory value caused by leakage.
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