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公开(公告)号：US11870277B2
公开(公告)日：2024-01-09
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：US10666280B2
公开(公告)日：2020-05-26
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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Patent Agency Ranking
公开(公告)号：US12007801B2
公开(公告)日：2024-06-11
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：US11342963B2
公开(公告)日：2022-05-24
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：US11200853B2
公开(公告)日：2021-12-14
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: G09G3/3233 , 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：US12009039B2
公开(公告)日：2024-06-11
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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7.发明授权公开(公告)号：US11443672B2
公开(公告)日：2022-09-13
申请号：US17241746
申请日：2021-04-27
Inventor： Young-Soo Hwang , Joon-Chul Goh , Ohjo Kwon , Jeongmin Kim , Bonghyun You , Hyung-Min Lee , Seung Hun Choi
Abstract: A data driver includes a digital to analog converter, a buffer and a buffer controller. The digital to analog converter is configured to receive a data signal having a digital type and to convert the data signal into a data voltage having an analog type. The buffer is configured to buffer the data voltage and to output the data voltage. The buffer controller is configured to determine a parameter of the buffer based on previous line data of the data signal and present line data of the data signal.
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