Patents by Inventor Yeong-Joon Son
Yeong-Joon Son 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).
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Patent number: 9899091Abstract: There are provided a high voltage switch circuit and a semiconductor memory device including the same. A high voltage switch circuit may include a switching circuit including a first depletion transistor and a first high voltage transistor, which are coupled in series between an input terminal and an output terminal, and a control signal generator for applying, to the first depletion transistor, a control signal having the same potential level as an input voltage applied to the input terminal, in response to a first enable signal and a second enable signal.Type: GrantFiled: June 22, 2017Date of Patent: February 20, 2018Assignee: SK hynix Inc.Inventors: Yeong Joon Son, Jin Su Park
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Patent number: 9859009Abstract: There are provided a high voltage switch circuit and a semiconductor memory device including the same. A high voltage switch circuit may include a switching circuit including a first depletion transistor and a first high voltage transistor, which are coupled in series between an input terminal and an output terminal, and a control signal generator for applying, to the first depletion transistor, a control signal having the same potential level as an input voltage applied to the input terminal, in response to a first enable signal and a second enable signal.Type: GrantFiled: June 22, 2017Date of Patent: January 2, 2018Assignee: SK hynix Inc.Inventors: Yeong Joon Son, Jin Su Park
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Patent number: 9786371Abstract: Provided herein are a power-on reset circuit and a semiconductor memory device including the same. The power-on reset circuit may include: a voltage dividing circuit suitable for dividing an external power supply voltage to output a reference voltage, an output node control circuit suitable for controlling a potential level of an output node to an external power supply voltage level or a ground power supply voltage level in response to the reference voltage, and a buffer circuit suitable for buffering the potential level of the output node to output a power-on reset signal. In the voltage dividing circuit, a potential level of the reference voltage in a power up period is different from a potential level of the reference voltage in a power down period.Type: GrantFiled: October 11, 2016Date of Patent: October 10, 2017Assignee: SK Hynix Inc.Inventors: Hyun Chul Lee, Yeong Joon Son
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Publication number: 20170287562Abstract: There are provided a high voltage switch circuit and a semiconductor memory device including the same. A high voltage switch circuit may include a switching circuit including a first depletion transistor and a first high voltage transistor, which are coupled in series between an input terminal and an output terminal, and a control signal generator for applying, to the first depletion transistor, a control signal having the same potential level as an input voltage applied to the input terminal, in response to a first enable signal and a second enable signal.Type: ApplicationFiled: June 22, 2017Publication date: October 5, 2017Applicant: SK hynix Inc.Inventors: Yeong Joon SON, Jin Su PARK
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Publication number: 20170287563Abstract: There are provided a high voltage switch circuit and a semiconductor memory device including the same. A high voltage switch circuit may include a switching circuit including a first depletion transistor and a first high voltage transistor, which are coupled in series between an input terminal and an output terminal, and a control signal generator for applying, to the first depletion transistor, a control signal having the same potential level as an input voltage applied to the input terminal, in response to a first enable signal and a second enable signal.Type: ApplicationFiled: June 22, 2017Publication date: October 5, 2017Applicant: SK hynix Inc.Inventors: Yeong Joon SON, Jin Su PARK
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Patent number: 9721667Abstract: There are provided a high voltage switch circuit and a semiconductor memory device including the same. A high voltage switch circuit may include a switching circuit including a first depletion transistor and a first high voltage transistor, which are coupled in series between an input terminal and an output terminal, and a control signal generator for applying, to the first depletion transistor, a control signal having the same potential level as an input voltage applied to the input terminal, in response to a first enable signal and a second enable signal.Type: GrantFiled: February 26, 2016Date of Patent: August 1, 2017Assignee: SK hynix Inc.Inventors: Yeong Joon Son, Jin Su Park
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Patent number: 9620053Abstract: The present invention relates to a technique for outputting threshold voltages by properly changing the threshold voltages such that the threshold voltages can protect low-voltage driving elements within an analog to digital converter when the threshold voltages of an OLED display panel are sensed and outputted to the analog to digital converter. The present invention comprises: a sampling capacitor which samples threshold voltages sensed and inputted from an organic light-emitting diode on a display panel; a charge-sharing capacitor which charges and shares the threshold voltages sampled from the sampling capacitor, or solely charges the threshold voltages to bypass the threshold voltages; and a sample-and-hold unit which has a plurality of switches for performing switching operations for the sampling operation of the sampling capacitor and the charging and the sharing of the charge-sharing capacitor, and scales the threshold voltages to threshold voltage areas having a certain value or less.Type: GrantFiled: December 28, 2012Date of Patent: April 11, 2017Assignee: SILICON WORKS CO., LTD.Inventors: Ji-Hun Kim, Hae-Won Lee, Kyoung-Jik Min, Yeong-Joon Son
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Publication number: 20170084339Abstract: There are provided a high voltage switch circuit and a semiconductor memory device including the same. A high voltage switch circuit may include a switching circuit including a first depletion transistor and a first high voltage transistor, which are coupled in series between an input terminal and an output terminal, and a control signal generator for applying, to the first depletion transistor, a control signal having the same potential level as an input voltage applied to the input terminal, in response to a first enable signal and a second enable signal.Type: ApplicationFiled: February 26, 2016Publication date: March 23, 2017Inventors: Yeong Joon SON, Jin Su PARK
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Patent number: 9373366Abstract: A nonvolatile memory device may include a power-on reset signal generation unit suitable for receiving a power supply voltage, and generating a power-on reset signal that changes based on the power supply voltage, and a discharging signal generation unit suitable for generating a discharging signal for discharging a word line to be activated earlier than an activation timing of the power-on reset signal when the power supply voltage decreases.Type: GrantFiled: February 26, 2015Date of Patent: June 21, 2016Assignee: SK Hynix Inc.Inventor: Yeong-Joon Son
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Patent number: 9355609Abstract: Provided is a malfunction prevention circuit for a COG-form source driver integrated circuit with a power sequence in which a low voltage is applied after a high voltage is applied. The malfunction prevention circuit includes: a level shifter configured to process an input signal using the low voltage and output a control signal using the high voltage; and an initialization circuit configured to initialize the control signal to a constant voltage while an initialization signal is enabled. The initialization signal is enabled during a predetermined time from the time at which the low voltage starts to be applied at the initial stage of the power sequence.Type: GrantFiled: May 9, 2013Date of Patent: May 31, 2016Assignee: SILICON WORKS CO., LTD.Inventors: Yeong Joon Son, Myung Yu Kim
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Patent number: 9343118Abstract: A voltage regulator includes: a comparator configured to compare a feedback voltage with a reference voltage to output an enable signal and operate based on a bias current; a pass transistor turned on according to the enable signal and configured to output an external power voltage as an output voltage; a voltage distribution circuit configured to distribute and output the output voltage to an input terminal of the comparator; and a bias current control unit configured to control an amount of the bias current supplied to the comparator based on the output voltage.Type: GrantFiled: April 17, 2014Date of Patent: May 17, 2016Assignee: SK hynix Inc.Inventor: Yeong Joon Son
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Publication number: 20160133302Abstract: A nonvolatile memory device may include a power-on reset signal generation unit suitable for receiving a power supply voltage, and generating a power-on reset signal that changes based on the power supply voltage, and a discharging signal generation unit suitable for generating a discharging signal for discharging a word line to be activated earlier than an activation timing of the power-on reset signal when the power supply voltage decreases.Type: ApplicationFiled: February 26, 2015Publication date: May 12, 2016Inventor: Yeong-Joon SON
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Patent number: 9143090Abstract: The present invention relates to an output voltage stabilization circuit. Specifically, the present invention relates to an output voltage stabilization circuit of a display device driving circuit, which generates a reference current dependent on a high source voltage using a current source independent of a magnitude of the high source voltage, generates a reference current dependent on a low source voltage using a current source independent of a magnitude of the low source voltage, and then generates a control signal by comparing the magnitudes to each other, whereby the output voltage stabilization circuit may stabilize an output voltage regardless of an order in which the low source voltage and the high source voltage are turned off in a circuit using both the low source voltage and the high source voltage.Type: GrantFiled: November 19, 2010Date of Patent: September 22, 2015Assignee: SILICON WORKS CO., LTD.Inventors: Jung Il Seo, Yong Jung Kwon, An Young Kim, Joon Ho Na, Yun Tack Han, Ji Hun Kim, Hyun Min Song, Yeong Joon Son, Sung Wan Jung, Sang Woo Kim, Hae Won Lee
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Publication number: 20150124546Abstract: A voltage regulator includes: a comparator configured to compare a feedback voltage with a reference voltage to output an enable signal and operate based on a bias current; a pass transistor turned on according to the enable signal and configured to output an external power voltage as an output voltage; a voltage distribution circuit configured to distribute and output the output voltage to an input terminal of the comparator; and a bias current control unit configured to control an amount of the bias current supplied to the comparator based on the output voltage.Type: ApplicationFiled: April 17, 2014Publication date: May 7, 2015Applicant: SK hynix Inc.Inventor: Yeong Joon SON
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Patent number: 8933919Abstract: Disclosed is a liquid crystal panel driving circuit of display stabilization, including: a plurality of output buffers buffering data voltage and supplying or cutting off the buffered data voltage to or from each of the plurality of data lines; an output MUX switch receiving outputs from two adjacent output buffers of the plurality of output buffers and transferring one of the two outputs to the plurality of data lines; a garbage switch connecting each of the plurality of data lines to a ground terminal; and a power on sensor or a power off sensor generating a power on or off reset signal in response to a turn on/off of a power supply voltage, wherein the output MUX switch is turned-off and the charge share switch and the garbage switch are turned-on, in response to the power on reset signal or the power off reset signal.Type: GrantFiled: May 1, 2012Date of Patent: January 13, 2015Assignee: Silicon Works Co., Ltd.Inventors: Yeong-Joon Son, Ji-Hun Kim, Sang-Min Lee, Joon-Ho Na, Hae-Won Lee
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Publication number: 20140368415Abstract: The present invention relates to a technique for outputting threshold voltages by properly changing the threshold voltages such that the threshold voltages can protect low-voltage driving elements within an analog to digital converter when the threshold voltages of an OLED display panel are sensed and outputted to the analog to digital converter. The present invention comprises: a sampling capacitor which samples threshold voltages sensed and inputted from an organic light-emitting diode on a display panel; a charge-sharing capacitor which charges and shares the threshold voltages sampled from the sampling capacitor, or solely charges the threshold voltages to bypass the threshold voltages; and a sample-and-hold unit which has a plurality of switches for performing switching operations for the sampling operation of the sampling capacitor and the charging and the sharing of the charge-sharing capacitor, and scales the threshold voltages to threshold voltage areas having a certain value or less.Type: ApplicationFiled: December 28, 2012Publication date: December 18, 2014Inventors: Ji-Hun Kim, Hae-Won Lee, Kyoung-Jik Min, Yeong-Joon Son
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Publication number: 20130300726Abstract: Provided is a malfunction prevention circuit for a COG-form source driver integrated circuit with a power sequence in which a low voltage is applied after a high voltage is applied. The malfunction prevention circuit includes: a level shifter configured to process an input signal using the low voltage and output a control signal using the high voltage; and an initialization circuit configured to initialize the control signal to a constant voltage while an initialization signal is enabled. The initialization signal is enabled during a predetermined time from the time at which the low voltage starts to be applied at the initial stage of the power sequence.Type: ApplicationFiled: May 9, 2013Publication date: November 14, 2013Applicant: SILICON WORKS CO., LTD.Inventors: Yeong Joon SON, Myung Yu KIM
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Publication number: 20130162618Abstract: The present invention relates to an output voltage stabilization circuit. Specifically, the present invention relates to an output voltage stabilization circuit of a display device driving circuit, which generates a reference current dependent on a high source voltage using a current source independent of a magnitude of the high source voltage, generates a reference current dependent on a low source voltage using a current source independent of a magnitude of the low source voltage, and then generates a control signal by comparing the magnitudes to each other, whereby the output voltage stabilization circuit may stabilize an output voltage regardless of an order in which the low source voltage and the high source voltage are turned off in a circuit using both the low source voltage and the high source voltage.Type: ApplicationFiled: November 19, 2010Publication date: June 27, 2013Applicant: SILICON WORKS CO., LTDInventors: Jung Il Seo, Yong Jung Kwon, An Young Kim, Joon Ho Na, Yun Tack Han, Ji Hun Kim, Hyun Min Song, Yeong Joon Son, Sung Wan Jung
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Publication number: 20120280961Abstract: Disclosed is a liquid crystal panel driving circuit of display stabilization, including: a plurality of output buffers buffering data voltage and supplying or cutting off the buffered data voltage to or from each of the plurality of data lines; an output MUX switch receiving outputs from two adjacent output buffers of the plurality of output buffers and transferring one of the two outputs to the plurality of data lines; a garbage switch connecting each of the plurality of data lines to a ground terminal; and a power on sensor or a power off sensor generating a power on or off reset signal in response to a turn on/off of a power supply voltage, wherein the output MUX switch is turned-off and the charge share switch and the garbage switch are turned-on, in response to the power on reset signal or the power off reset signal.Type: ApplicationFiled: May 1, 2012Publication date: November 8, 2012Applicant: SILICON WORKS CO., LTDInventors: Yeong-Joon SON, Ji-Hun KIM, Sang-Min LEE, Joon-Ho NA, Hae-Won LEE
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Publication number: 20110279298Abstract: A DAC circuit using a charge subtraction method and a change transfer interpolation method includes resistor cells configured to divide a voltage of data of total K bits (=upper M bits+lower N bits) by resistance dividers; a decoder group configured to receive digital data of the M bits and the N bits divided in the resistor cells, process the digital data by the unit of 2 bits, and output respective corresponding voltages; a capacitor group configured to receive the voltages outputted from the decoder group and realize charge charging by a charge subtraction method and charge transferring by a charge transfer interpolation method; and an operational amplifier having a first input terminal which receives a reference voltage and a second input terminal which receives an interpolation voltage corresponding to an amount of charges transferred from the capacitor group, and configured to generate an output voltage.Type: ApplicationFiled: May 4, 2011Publication date: November 17, 2011Applicant: SILICON WORKS CO., LTDInventors: Ji-Hun KIM, Yeong-Joon Son, Joon-Ho Na, Jeong-Yeol Bae, Sang-Gug Lee