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).

  • 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
  • Patent number: 9590665
    Abstract: A transmitter in a wireless communication system is provided. The transmitter includes a baseband signal processor for detecting an envelope signal, a supply modulator (SM) for producing power to be supplied to a power amplifier using the detected envelope signal, and the power amplifier for receiving voltage from the SM and for amplifying power of a transmit signal. The SM generates a compensation signal corresponding to switching noise generated via switching amplification, and adds the compensation signal and the switching noise. The amplifier of the wireless communication system can produce low switching noise, and the envelope tracking power amplifier can prevent reception degradation due to the noise of the supply modulator.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: March 7, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-Sun Lim, Seung-Chul Lee, Thomas Byung-Hak Cho, Ji-Seon Paek, Jun-Seok Yang, Jun-Hee Jung
  • Patent number: 9525384
    Abstract: A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control signal input from a modem is received. A reference voltage is determined. An operating mode of the SM is changed by controlling a level of the reference voltage. A voltage is determined based on the level of a reference voltage. When the operating mode of the SM is an ET mode, a first output signal from a linear regulator and a second output signal from a switching regulator are combined to obtain a combined result, and the combined result is output. The first output signal is based on the voltage. When the operating mode of the SM is an APT mode, the voltage based on the reference voltage is output.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: December 20, 2016
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sung-Jun Lee, Ji-Seon Paek, Seung-Chul Lee, Yong-Sik Youn, Jun-Hee Jung, Thomas Byunghak Cho, Sang-Wook Han
  • Publication number: 20160065139
    Abstract: A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control signal input from a modem is received. A reference voltage is determined. An operating mode of the SM is changed by controlling a level of the reference voltage. A voltage is determined based on the level of a reference voltage. When the operating mode of the SM is an ET mode, a first output signal from a linear regulator and a second output signal from a switching regulator are combined to obtain a combined result, and the combined result is output. The first output signal is based on the voltage. When the operating mode of the SM is an APT mode, the voltage based on the reference voltage is output.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 3, 2016
    Inventors: Sung-Jun LEE, Ji-Seon Paek, Seung-Chul Lee, Yong-Sik Youn, Jun-Hee Jung, Thomas Byunghak Cho, Sang-Wook Han
  • Publication number: 20160065142
    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: Application
    Filed: September 2, 2015
    Publication date: March 3, 2016
    Inventors: Ji-Seon PAEK, Seung-Chul LEE, Young-Hwan CHOO, Sung-Jun LEE, Jun-Hee JUNG, Thomas Byunghak CHO, Jeong-Hyun CHOI
  • Publication number: 20150349816
    Abstract: A transmitter in a wireless communication system is provided. The transmitter includes a baseband signal processor for detecting an envelope signal, a supply modulator (SM) for producing power to be supplied to a power amplifier using the detected envelope signal, and the power amplifier for receiving voltage from the SM and for amplifying power of a transmit signal. The SM generates a compensation signal corresponding to switching noise generated via switching amplification, and adds the compensation signal and the switching noise. The amplifier of the wireless communication system can produce low switching noise, and the envelope tracking power amplifier can prevent reception degradation due to the noise of the supply modulator.
    Type: Application
    Filed: May 28, 2015
    Publication date: December 3, 2015
    Inventors: Hyung-Sun LIM, Seung-Chul LEE, Thomas Byung-Hak CHO, Ji-Seon PAEK, Jun-Seok YANG, Jun-Hee JUNG
  • Patent number: 9065394
    Abstract: An apparatus for amplifying power is provided. The apparatus includes a supply modulator for generating a supply voltage based on an amplitude component of a transmission signal, and a power amplify module for amplifying power of the transmission signal using the supply voltage, wherein the power amplify module includes a first power amplifier and a second power amplifier, and when an output power of the transmission signal is greater than a reference power, the first power amplifier amplifies the power of the transmission signal using the supply voltage, and when the output power of the transmission signal is equal to or less than the reference power, the second power amplifier amplifies the power of the transmission signal using the supply voltage.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: June 23, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-Sun Lim, Hee-Sang Noh, Young-Eil Kim, Bok-Ju Park, Sang-Hyun Baek, Ji-Seon Paek, Jun-Seok Yang
  • Patent number: 8908795
    Abstract: A transmit apparatus having a supply modulator is provided. The apparatus includes a detector and the supply modulator. In the method, the detector detects an output signal of the supply modulator. Also, the supply modulator receives the detected output signal of the supply modulator from the detector and calibrates a modulation characteristic of the supply modulator. The transmit apparatus having a supply modulator includes a modulator/demodulator (modem) and the supply modulator. The modem provides a calibration signal for calibrating a modulation characteristic of the supply modulator, to the supply modulator. The supply modulator outputs a modulated signal in accordance with the calibrated modulation characteristic of the supply modulator based on the calibration signal from the modem.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: December 9, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Seon Paek, Hee-Sang Noh, Hyung-Sun Lim, Dong-Ki Kim, Jun-Seok Yang
  • Patent number: 8803606
    Abstract: An apparatus for amplifying power is provided. The apparatus includes a supply modulator for generating a supply voltage based on an amplitude component of a transmission signal, and a power amplify module for amplifying power of the transmission signal using the supply voltage, wherein the power amplify module includes a first power amplifier and a second power amplifier, and when an output power of the transmission signal is greater than a reference power, the first power amplifier amplifies the power of the transmission signal using the supply voltage, and when the output power of the transmission signal is equal to or less than the reference power, the second power amplifier amplifies the power of the transmission signal using the supply voltage.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: August 12, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-Sun Lim, Hee-Sang Noh, Young-Eil Kim, Bok-Ju Park, Sang-Hyun Baek, Ji-Seon Paek, Jun-Seok Yang
  • Patent number: 8766716
    Abstract: An apparatus of a hybrid power modulator using interleaving switching is provided. The apparatus includes a linear switching unit for generating an output signal by comparing an envelope input signal and a feedback signal, an interleaving signal generator for generating an interleaving switching signal arranged not to supply the signal to input stages of P-type Metal-Oxide-Semiconductor (MOS) Field Effect Transistors (FETs) and N-type MOS FETs of power cells at the same time by comparing the output signal and a reference signal, and a switching amplifying unit for determining a level of the switching signal using the interleaving switching signal. Hence, the hybrid power modulator using the interleaving switching method in the envelope signal of the wide bandwidth maintains high efficiency and high linearity. In addition, the buck converter can use the single inductor by preventing the simultaneous on/off of the power cells.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: July 1, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Seon Paek, Dong-Ki Kim, Hee-Sang Noh, Hyung-Sun Lim, Jun-Seok Yang, Young-Eil Kim
  • Publication number: 20140111277
    Abstract: An apparatus for amplifying power is provided. The apparatus includes a supply modulator for generating a supply voltage based on an amplitude component of a transmission signal, and a power amplify module for amplifying power of the transmission signal using the supply voltage, wherein the power amplify module includes a first power amplifier and a second power amplifier, and when an output power of the transmission signal is greater than a reference power, the first power amplifier amplifies the power of the transmission signal using the supply voltage, and when the output power of the transmission signal is equal to or less than the reference power, the second power amplifier amplifies the power of the transmission signal using the supply voltage.
    Type: Application
    Filed: December 27, 2013
    Publication date: April 24, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hyung-Sun LIM, Hee-Sang NOH, Young-Eil KIM, Bok-Ju PARK, Sang-Hyun BAEK, Ji-Seon PAEK, Jun-Seok YANG
  • Patent number: 8643435
    Abstract: An apparatus and a method for expanding an operation region in an envelope tracking power amplifier are provided. The apparatus for amplifying power of a transmission signal includes an amplitude component determination unit, a supply modulator, and a power amplify module. The amplitude component determination unit determines an amplitude component of a transmission signal. The supply modulator generates a supply voltage to be provided to the power amplify module depending on the amplitude component of the transmission signal determined by the amplitude component determination unit. The power amplify module amplifies power of the transmission signal depending on the supply voltage generated by the supply modulator.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: February 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-Sun Lim, Hee-Sang Noh, Young-Eil Kim, Bok-Ju Park, Sang-Hyun Baek, Ji-Seon Paek, Jun-Seok Yang