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    POWER MANAGEMENT INTEGRATED CIRCUIT FOR HARVESTING ENERGY AND ENERGY HARVESTING SYSTEM INCLUDING THE SAME
    1.
    发明申请
    POWER MANAGEMENT INTEGRATED CIRCUIT FOR HARVESTING ENERGY AND ENERGY HARVESTING SYSTEM INCLUDING THE SAME 有权

    公开(公告)号：US20230029579A1

    公开(公告)日：2023-02-02

    申请号：US17729756

    申请日：2022-04-26

    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Sang-Gug Lee ,  Young-Seok Noh ,  Jeong-Il Seo ,  Won-Jong Choi

    IPC: H01L35/28 ,  H02J7/00

    Abstract: A power management integrated circuit includes a reconfigurable converter connected to a rechargeable battery and a control circuit. The reconfigurable converter includes an indcutor to accumulate energy based on an input voltage from a thermoelectric device, provides a wireless sensor node connected to an output node with an output voltage based on the input voltage and an internal input voltage of the rechargeable battery, operates in one of operation modes based on an available power provided from the thermoelectric device and a power consumption by the wireless sensor node and drives the wireless sensor node in response to the wireless sensor node consuming a current greater than a maximum current generated by the thermoelectric device. The control circuit to control the reconfigurable converter based on the input voltage, a first voltage of a first switching node, a second voltage of a second switching node and the output voltage.

    Power management device for energy harvesting
    2.
    发明授权
    Power management device for energy harvesting 有权

    公开(公告)号：US09923453B1

    公开(公告)日：2018-03-20

    申请号：US15603815

    申请日：2017-05-24

    Applicant: Korea Advanced Institute of Science and Technology

    Inventor： Sang-Gug Lee ,  Baek-Min Lim ,  Jeong-Il Seo ,  Young-Seok Noh ,  Hyun-Mo Gu

    IPC: H02M3/158 ,  H02M1/36 ,  H01L35/02

    CPC classification number: H02M1/36 ,  H01L35/02 ,  H02J7/0052 ,  H02M3/158

    Abstract: A power management device according to example embodiments includes a self-startup circuit including an oscillator and a voltage multiplier to generate a start-up voltage in a first start-up period based on an input voltage, a boost converter to alternately charge the start-up voltage and an output voltage within a start-up voltage range during a second start-up period and to charge only the output voltage during an operation period, a controller to control the self-startup circuit and the boost converter based on a magnitude of the start-up voltage, a voltage charger including a start-up voltage capacitor and an output voltage capacitor, and a shared inductor connected between the input node and a common input node. The shared inductor operates as a part of the oscillator during the first start-up period and a part of the boost converter during the second start-up and operation periods.

    METHOD FOR HIGH-FREQUENCY AMPLIFIER USING POWER GAIN-BOOSTING TECHNIQUE
    4.
    发明申请
    METHOD FOR HIGH-FREQUENCY AMPLIFIER USING POWER GAIN-BOOSTING TECHNIQUE 有权
    使用功率增益技术的高频放大器的方法

    公开(公告)号：US20150333707A1

    公开(公告)日：2015-11-19

    申请号：US14590253

    申请日：2015-01-06

    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Sang-Gug Lee ,  Bao Lam Huu ,  Suna Kim ,  Jeong Seon Lee

    IPC: H03F1/08 ,  G06F17/50 ,  H03F3/193

    CPC classification number: H03F3/193 ,  G06F17/5045 ,  G06F17/5063 ,  G06F2217/02 ,  G06F2217/06 ,  G06F2217/08 ,  G06F2217/78 ,  H03F1/086 ,  H03F1/56 ,  H03F2200/222 ,  H03F2200/294 ,  H03F2200/387 ,  H03H7/38

    Abstract: The present invention provides a power gain-boosting technique for an amplifier in order to compensate for the decrease of Gmag in a transistor at high frequencies. A power gain-boosting technique of the present invention comprises the steps of: finding the Maximum Unilateral Gain or Mason's Invariant U of a transistor; designing a linear, lossless, reciprocal network embedding the transistor so that the final equivalent S-, Y-, or Z-parameters satisfy the condition: S  21 S 12 = Y 2   1 Y 1   2 = Z 2   1 Z 1   2 = - [ ( 2  U - 1 ) + 2  U  ( U - 1 ) ] ; embedding the transistor into the linear, lossless, reciprocal network; and constructing simultaneous conjugate matching.

    Abstract translation: 本发明提供了一种用于放大器的功率增益增强技术，以补偿高频下晶体管中的Gmag的减小。 本发明的增益增益技术包括以下步骤：找出晶体管的最大单边增益或梅森不变量U; 设计嵌入晶体管的线性无损互逆网络，使得最终的等效S，Y或Z参数满足以下条件：S 21 21 = Y 21 Y 12 = Z 2 （1）U 1（U-1）+ 2（U-1）]; 将晶体管嵌入线性无损互逆网络; 并构建同时的共轭匹配。

    Method and apparatus for modulating/demodulating an FSK signal
    5.
    发明授权
    Method and apparatus for modulating/demodulating an FSK signal 有权

    公开(公告)号：US11665032B2

    公开(公告)日：2023-05-30

    申请号：US17619353

    申请日：2019-09-25

    Applicant: Korea Advanced Institute of Science and Technology

    Inventor： Sang-Gug Lee ,  Eui-Rim Jeong ,  Jinho Ko ,  Keun-Mok Kim

    IPC: H04L27/00 ,  H04L27/10

    CPC classification number: H04L27/0006 ,  H04L27/10

    Abstract: A method and apparatus for modulating/demodulating an FSK signal capable of overcoming a trade-off relationship between a modulation index and a spectral efficiency are disclosed. An apparatus for modulating/demodulating a frequency deviation keying (FSK) signal includes a channel selection-modulator, a phase locked loop, and an output unit. The channel selection-modulator modulates an FSK signal by setting a frequency channel to be used. The phase locked loop generates a desired output frequency ‘fout’ compared to a reference frequency ‘fREF’ by adjusting a frequency division ratio (N+n) with respect to a frequency of the modulated FSK signal. The output unit amplifies the FSK signal having the generated output frequency ‘fout’ and radiating the amplified FSK signal through an antenna. Here, each of the frequency channels is divided into two or more tones, and different frequency channels are allocated between the tones divided into two or more tones.

    Current mode hysteretic buck converter with auto-selectable frequency locking circuit
    6.
    发明授权
    Current mode hysteretic buck converter with auto-selectable frequency locking circuit 有权

    公开(公告)号：US10199917B2

    公开(公告)日：2019-02-05

    申请号：US15690670

    申请日：2017-08-30

    Applicant: Korea Advanced Institute of Science and Technology

    Inventor： Sang-Gug Lee ,  Jeong-Il Seo ,  Baek-Min Lim

    IPC: H02M1/08 ,  H02M1/14 ,  H02M3/156 ,  H02M1/00

    Abstract: A current mode hysteretic buck converter employing an auto-selectable frequency locking circuit is disclosed. The auto-selectable frequency locking type buck converter include a current mode hysteretic buck converter for converting an input DC voltage into a lower DC voltage, and a frequency locking unit for locking a switching frequency of the current mode hysteretic buck converter wherein the switching frequency is locked through adjusting a locking value of the switching frequency to be a predetermined value according to a size of a load. The buck converter is, based on the current mode hysteretic control, related to a circuit that locks the switching frequency of the converter to reduce the difficulty of designing electromagnetic interference (EMI) filters in the converter. In addition, the buck converter can improve the efficiency at light load by adjusting the switching frequency which is locked according to the load current.

    Optimized battery charging method based on thermodynamic information of battery
    7.
    发明授权
    Optimized battery charging method based on thermodynamic information of battery 有权

    公开(公告)号：US09985466B2

    公开(公告)日：2018-05-29

    申请号：US15044213

    申请日：2016-02-16

    Applicant: Korea Advanced Institute of Science and Technology

    Inventor： Sang-Gug Lee ,  Guillaume Thenaisie

    IPC: H02J7/00 ,  H02J7/04

    CPC classification number: H02J7/047 ,  H02J2007/0096 ,  Y02B40/90

    Abstract: Disclosed is an optimized battery charging method based on thermodynamic information of a battery. Thermodynamic information on a material structure of a battery, for instance, entropy of the battery is extracted. Boundary points at which state transitions of the battery material are determined using the thermodynamic information extracted. Phases of the battery are identified based on the boundary points determined. The most appropriate charging patterns adapted to each of the phases identified are determined. A charging algorithm for charging the battery can be constructed by combining the most appropriate charging patterns determined. This charging algorithm is applied to the charging of the battery.

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