Patents by Inventor Ji-Seon Paek

Ji-Seon Paek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200321917
    Abstract: A symbol power tracking amplification system including: a modem to generate data and symbol tracking signals; a symbol tracking modulator including a control circuit, first and second voltage supply circuits and a switch circuit, the control circuit generates first and second voltage level control signals in response to the symbol tracking signal, the first voltage supply circuit generates a first output voltage in response to the first voltage level control signal, the second voltage supply circuit generates a second output voltage in response to the second voltage level control signal and the switch circuit outputs the first or second output voltages as a supply voltage in response to a switch control signal; an RF block to generate an RF signal based on the data signal from the modem; and a power amplifier to adjust a power level of the RF signal based on the supply voltage.
    Type: Application
    Filed: May 28, 2020
    Publication date: October 8, 2020
    Inventors: Takahiro Nomiyama, Ji-seon Paek, Dong-su Kim
  • Publication number: 20200304029
    Abstract: A switching regulator including a first converting stage and a second converting stage may be provided. The first converting stage may include a first output capacitor connected between a first output node and ground, the first converting stage configured to receive a first input voltage and provide an output voltage by adjusting a level of the output voltage based on a first dynamic voltage scaling (DVS) rate relating to a first load condition of a processing circuit. The second converting stage may include a second output capacitor connected between a second output node and the ground, the second converting stage configured to receive a second input voltage and provide the output voltage by adjusting the level of the output voltage based on a second DVS rate relating to a second load condition of the processing circuit, which is heavier than the first load condition of the processing circuit.
    Type: Application
    Filed: September 27, 2019
    Publication date: September 24, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Nomiyama TAKAHIRO, lk-hwan KIM, Ji-seon PAEK
  • Patent number: 10686407
    Abstract: A symbol power tracking amplification system including: a modem to generate data and symbol tracking signals; a symbol tracking modulator including a control circuit, first and second voltage supply circuits and a switch circuit, the control circuit generates first and second voltage level control signals in response to the symbol tracking signal, the first voltage supply circuit generates a first output voltage in response to the first voltage level control signal, the second voltage supply circuit generates a second output voltage in response to the second voltage level control signal and the switch circuit outputs the first or second output voltages as a supply voltage in response to a switch control signal; an RF block to generate an RF signal based on the data signal from the modem; and a power amplifier to adjust a power level of the RF signal based on the supply voltage.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: June 16, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Takahiro Nomiyama, Ji-seon Paek, Dong-su Kim
  • Patent number: 10491161
    Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; and a buck converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: November 26, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yong Sik Youn, Seung Chul Lee, Ji Seon Paek, Thomas Byunghak Cho
  • Publication number: 20190334750
    Abstract: A symbol power tracking amplification system including: a modem to generate data and symbol tracking signals; a symbol tracking modulator including a control circuit, first and second voltage supply circuits and a switch circuit, the control circuit generates first and second voltage level control signals in response to the symbol tracking signal, the first voltage supply circuit generates a first output voltage in response to the first voltage level control signal, the second voltage supply circuit generates a second output voltage in response to the second voltage level control signal and the switch circuit outputs the first or second output voltages as a supply voltage in response to a switch control signal; an RF block to generate an RF signal based on the data signal from the modem; and a power amplifier to adjust a power level of the RF signal based on the supply voltage.
    Type: Application
    Filed: December 27, 2018
    Publication date: October 31, 2019
    Inventors: TAKAHIRO NOMIYAMA, Dong-su KIM, Ji-seon PAEK
  • Publication number: 20190334480
    Abstract: A symbol power tracking amplification system including: a modem to generate data and symbol tracking signals; a symbol tracking modulator including a control circuit, first and second voltage supply circuits and a switch circuit, the control circuit generates first and second voltage level control signals in response to the symbol tracking signal, the first voltage supply circuit generates a first output voltage in response to the first voltage level control signal, the second voltage supply circuit generates a second output voltage in response to the second voltage level control signal and the switch circuit outputs the first or second output voltages as a supply voltage in response to a switch control signal; an RF block to generate an RF signal based on the data signal from the modem; and a power amplifier to adjust a power level of the RF signal based on the supply voltage.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Inventors: Takahiro Nomiyama, Ji-seon Paek, Dong-su Kim
  • Patent number: 10305429
    Abstract: A supply modulator for providing a first power supply voltage and a second power supply voltage to a first power amplifier and a second power amplifier, respectively, includes a first modulation circuit including a linear regulator and a switching regulator, the first modulation circuit being configured to generate a first modulation voltage in accordance with envelope tracking, and provide the first modulation voltage to the first power amplifier as the first power supply voltage; and a single inductor multiple output converter configured to generate a first output voltage and a second output voltage based on an input voltage having a fixed level, provide the first output voltage to the linear regulator of the first modulation circuit as a power supply voltage, and provide the second output voltage to the second power amplifier as the second power supply voltage.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: May 28, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-hwan Choo, Ji-seon Paek, Dong-su Kim
  • Patent number: 10291181
    Abstract: A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: May 14, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-su Kim, Ji-seon Paek
  • Patent number: 10193500
    Abstract: A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 29, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-su Kim, Ji-seon Paek
  • Publication number: 20180367099
    Abstract: A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
    Type: Application
    Filed: August 22, 2018
    Publication date: December 20, 2018
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-su Kim, Ji-seon Paek
  • Patent number: 10044272
    Abstract: A transmitting device including: a modem configured to generate a baseband signal and an envelope data corresponding to the baseband signal; a supply modulator including a first switched-mode power supplier and a second switched-mode power supplier, the supply modulator configured to provide a modulated voltage to an output node based on the envelope data; and a power amplifier configured to amplify a carrier wave signal by using the modulated voltages, the carrier wave signal being associated with the baseband signal, wherein the first switched-mode power supplier includes: a pulse input node to receive a pulse signal generated in association with the envelope data; and a plurality of stages sequentially connected between the pulse input node and the output node, the plurality of stages configured to adjust the modulated voltage by filtering certain frequency band of the pulse signal, and the plurality of stages includes at least one variable impedance.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 7, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji Seon Paek, Dongsu Kim, Younghwan Choo
  • Patent number: 10003305
    Abstract: An apparatus and method for improving the efficiency of a power supply modulator for modulating a supply voltage of a power amplifier are provided. The apparatus for generating a supply voltage includes a Switching Mode Power Supplier (SMPS) module for generating a current of a power supply signal, and a linear regulator for generating a source current for supplementing an insufficient amount of the current generated by the SMPS module and a sink current for eliminating an excessive amount of the current generated by the SMPS module. The SMPS module generates the current of the power supply signal by selecting at least one of a plurality of power supplies that have different voltages according to a voltage level of an input signal of the SMPS module.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: June 19, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bok-Ju Park, Dong-Ki Kim, Ji-Seon Paek
  • Publication number: 20180152144
    Abstract: A supply modulator for providing a first power supply voltage and a second power supply voltage to a first power amplifier and a second power amplifier, respectively, includes a first modulation circuit including a linear regulator and a switching regulator, the first modulation circuit being configured to generate a first modulation voltage in accordance with envelope tracking, and provide the first modulation voltage to the first power amplifier as the first power supply voltage; and a single inductor multiple output converter configured to generate a first output voltage and a second output voltage based on an input voltage having a fixed level, provide the first output voltage to the linear regulator of the first modulation circuit as a power supply voltage, and provide the second output voltage to the second power amplifier as the second power supply voltage.
    Type: Application
    Filed: August 30, 2017
    Publication date: May 31, 2018
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-hwan Choo, Ji-seon Paek, Dong-su KIM
  • Publication number: 20180123458
    Abstract: A transmitting device including: a modem configured to generate a baseband signal and an envelope data corresponding to the baseband signal; a supply modulator including a first switched-mode power supplier and a second switched-mode power supplier, the supply modulator configured to provide a modulated voltage to an output node based on the envelope data; and a power amplifier configured to amplify a carrier wave signal by using the modulated voltages, the carrier wave signal being associated with the baseband signal, wherein the first switched-mode power supplier includes: a pulse input node to receive a pulse signal generated in association with the envelope data; and a plurality of stages sequentially connected between the pulse input node and the output node, the plurality of stages configured to adjust the modulated voltage by filtering certain frequency band of the pulse signal, and the plurality of stages includes at least one variable impedance.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 3, 2018
    Inventors: Ji Seon PAEK, Dongsu KIM, Younghwan CHOO
  • Publication number: 20180123516
    Abstract: A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
    Type: Application
    Filed: June 5, 2017
    Publication date: May 3, 2018
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-su KIM, Ji-seon PAEK
  • Patent number: 9859847
    Abstract: A parallel output linear amplifier is provided that includes a transconductance amplifier configured to receive an analog input signal from an input terminal and amplify the analog input signal. The parallel output linear amplifier also includes a first pre-amplifier connected to the transconductance amplifier and operated using a floating drive voltage, and a cascode class AB amplifier connected to the first pre-amplifier and configured to provide an amplified signal to an output terminal. The parallel output linear amplifier further includes a second pre-amplifier configured connected to the transconductance amplifier and operated using the floating drive voltage, and a cascade class AB amplifier connected to the second pre-amplifier and configured to provide an amplified signal to the output terminal.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: January 2, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ji-Seon Paek, Seung-Chul Lee, Young-Hwan Choo, Sung-Jun Lee, Jun-Hee Jung, Thomas Byunghak Cho, Jeong-Hyun Choi
  • Patent number: 9843260
    Abstract: A supply modulator including a first switched-mode power supplier configured to transmit a modulated voltage to an output node in response to an envelope signal, the first switched mode power supplier including: a switching circuit configured to transmit a pulse signal in response to the amplitude of the envelope signal; and a low pass filter configured to generate the modulated voltage by filtering certain frequency band of the pulse signal, the low pass filter comprising a plurality of stages; and a second switched-mode power supplier configured to selectively transmit a compensation current to the output node in response to the current transmitted from the first switched-mode power supplier, wherein each of the plurality of stages of the low pass filter comprises at least one variable impedances.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: December 12, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji Seon Paek, Dongsu Kim, Younghwan Choo
  • Publication number: 20170187332
    Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; and a buck converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output.
    Type: Application
    Filed: March 15, 2017
    Publication date: June 29, 2017
    Inventors: Yong Sik YOUN, Seung Chul Lee, Ji Seon Paek, Thomas Byunghak Cho
  • Publication number: 20170085224
    Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; a switch and capacitors module, including a first input connected to the output of the buck-boost converter, and a second input; a buck (dual) converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output connected to the second input of the switch and capacitors module; a linear amplifier (LA), including a supply input connected to the output of the buck-boost converter, an input, and an output connected to the second input of the switch and capacitors module; and the PA, including a supply input connected to the output of the buck (dual converter, an input for receiving a radio frequency (RF) signal, and an output for outputting an RF signal.
    Type: Application
    Filed: November 30, 2015
    Publication date: March 23, 2017
    Inventors: Yong Sik YOUN, Seung Chul LEE, Ji Seon PAEK, Thomas Byunghak CHO
  • Patent number: 9602057
    Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; a switch and capacitors module, including a first input connected to the output of the buck-boost converter, and a second input; a buck (dual) converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output connected to the second input of the switch and capacitors module; a linear amplifier (LA), including a supply input connected to the output of the buck-boost converter, an input, and an output connected to the second input of the switch and capacitors module; and the PA, including a supply input connected to the output of the buck (dual converter, an input for receiving a radio frequency (RF) signal, and an output for outputting an RF signal.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: March 21, 2017
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yong Sik Youn, Seung Chul Lee, Ji Seon Paek, Thomas Byunghak Cho