Patents by Inventor Ji-Wang Lee
Ji-Wang Lee 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: 10255974Abstract: An electronic device comprising a semiconductor memory unit that includes a resistance variable element configured to be changed in a resistance value according to a value of data stored therein; a first reference resistance element having a first resistance value; a second reference resistance element having a second resistance value larger than the first resistance value; and a comparison unit configured to receive a voltage corresponding to the resistance value of the resistance variable element through a first input terminal and a second input terminal thereof, a voltage corresponding to the first resistance value of the first reference resistance element through a third input terminal, and a voltage corresponding to the second resistance value of the second reference resistance element through a fourth input terminal, the comparison unit configured to output a result of comparing inputs to the first input terminal and the second input terminal and inputs to the third input terminal and fourth input termiType: GrantFiled: September 5, 2016Date of Patent: April 9, 2019Assignee: SK hynix Inc.Inventor: Ji-Wang Lee
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Publication number: 20170069374Abstract: An electronic device comprising a semiconductor memory unit that includes a resistance variable element configured to be changed in a resistance value according to a value of data stored therein; a first reference resistance element having a first resistance value; a second reference resistance element having a second resistance value larger than the first resistance value; and a comparison unit configured to receive a voltage corresponding to the resistance value of the resistance variable element through a first input terminal and a second input terminal thereof, a voltage corresponding to the first resistance value of the first reference resistance element through a third input terminal, and a voltage corresponding to the second resistance value of the second reference resistance element through a fourth input terminal, the comparison unit configured to output a result of comparing inputs to the first input terminal and the second input terminal and inputs to the third input terminal and fourth input termiType: ApplicationFiled: September 5, 2016Publication date: March 9, 2017Inventor: Ji-Wang Lee
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Patent number: 9437271Abstract: An electronic device comprising a semiconductor memory unit that includes a resistance variable element configured to be changed in a resistance value according to a value of data stored therein; a first reference resistance element having a first resistance value; a second reference resistance element having a second resistance value larger than the first resistance value; and a comparison unit configured to receive a voltage corresponding to the resistance value of the resistance variable element through a first input terminal and a second input terminal thereof, a voltage corresponding to the first resistance value of the first reference resistance element through a third input terminal, and a voltage corresponding to the second resistance value of the second reference resistance element through a fourth input terminal, the comparison unit configured to output a result of comparing inputs to the first input terminal and the second input terminal and inputs to the third input terminal and fourth input termiType: GrantFiled: October 18, 2013Date of Patent: September 6, 2016Assignee: SK hynix Inc.Inventor: Ji-Wang Lee
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Patent number: 9373394Abstract: A reference column of a semiconductor memory includes a reference bit line; a reference source line; and first to Nth resistive memory cells disposed between the reference bit line and the reference source line. Data of a first state is stored in the first resistive memory cell and data of a second state is stored in the Nth resistive memory cell before a read operation, and the first and Nth resistive memory cells form current paths between the reference bit line and the reference source line in the read operation.Type: GrantFiled: February 26, 2014Date of Patent: June 21, 2016Assignee: SK hynix Inc.Inventor: Ji-Wang Lee
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Patent number: 9263114Abstract: A semiconductor memory unit includes first to Nth variable resistance elements each having different resistance values according to values stored therein, wherein N is a natural number equal to or greater than 2; a reference resistance element having a first reference resistance value; and first to Nth comparison units which correspond to the first to Nth variable resistance elements, respectively, and each of which determines whether a resistance value of the corresponding variable resistance element is greater or less than a second reference resistance value, wherein the first to Nth comparison units are commonly coupled to the reference resistance element.Type: GrantFiled: December 8, 2014Date of Patent: February 16, 2016Assignees: SK Hynix Inc., KABUSHIKI KAISHA TOSHIBAInventors: Ji-Wang Lee, Dong-Keun Kim, Masahiro Takahashi, Tsuneo Inaba
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Publication number: 20150294705Abstract: A semiconductor memory unit includes first to Nth variable resistance elements each having different resistance values according to values stored therein, wherein N is a natural number equal to or greater than 2; a reference resistance element having a first reference resistance value; and first to Nth comparison units which correspond to the first to Nth variable resistance elements, respectively, and each of which determines whether a resistance value of the corresponding variable resistance element is greater or less than a second reference resistance value, wherein the first to Nth comparison units are commonly coupled to the reference resistance element.Type: ApplicationFiled: December 8, 2014Publication date: October 15, 2015Inventors: Ji-Wang LEE, Dong-Keun KIM, Masahiro TAKAHASHI, Tsuneo INABA
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Publication number: 20140241041Abstract: A reference column of a semiconductor memory includes a reference bit line; a reference source line; and first to Nth resistive memory cells disposed between the reference bit line and the reference source line. Data of a first state is stored in the first resistive memory cell and data of a second state is stored in the Nth resistive memory cell before a read operation, and the first and Nth resistive memory cells form current paths between the reference bit line and the reference source line in the read operation.Type: ApplicationFiled: February 26, 2014Publication date: August 28, 2014Applicant: SK HYNIX INC.Inventor: Ji-Wang Lee
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Publication number: 20140244930Abstract: An electronic device comprising a semiconductor memory unit that includes a resistance variable element configured to be changed in a resistance value according to a value of data stored therein; a first reference resistance element having a first resistance value; a second reference resistance element having a second resistance value larger than the first resistance value; and a comparison unit configured to receive a voltage corresponding to the resistance value of the resistance variable element through a first input terminal and a second input terminal thereof, a voltage corresponding to the first resistance value of the first reference resistance element through a third input terminal, and a voltage corresponding to the second resistance value of the second reference resistance element through a fourth input terminal, the comparison unit configured to output a result of comparing inputs to the first input terminal and the second input terminal and inputs to the third input terminal and fourth input termiType: ApplicationFiled: October 18, 2013Publication date: August 28, 2014Applicant: SK hynix Inc.Inventor: Ji-Wang Lee
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Patent number: 8610458Abstract: An impedance control circuit includes a first impedance unit configured to terminate an impedance node using an impedance value that is determined by an impedance control code, a second impedance unit configured to terminate the impedance node using an impedance value that is determined by an impedance control voltage, a comparison circuit configured to compare a voltage level of the impedance node and a voltage level of a reference voltage, generate an up/down signal indicating whether the voltage at the impedance node is greater than the reference voltage, and generate the impedance control voltage that has a voltage level corresponding to a difference between the voltage at the impedance node and the reference voltage, and a counter unit configured to increase or decrease a value of the impedance control code in response to the up/down signal.Type: GrantFiled: April 13, 2012Date of Patent: December 17, 2013Assignee: Hynix Semiconductor Inc.Inventor: Ji-Wang Lee
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Patent number: 8461878Abstract: The input buffer circuit of a semiconductor apparatus includes a first buffering unit that that is activated by a voltage level difference between a first voltage terminal and a second voltage terminal, and generates a first compare signal and a second compare signal by comparing the voltage levels of reference voltage and an input signal; a control unit that controls the amount of current flowing between the second voltage terminal and a ground terminal by comparing the voltage levels of the reference voltage and the second compare signal; and a second buffering unit that generates an output signal by comparing the voltage levels of the input signal and the first compare signal.Type: GrantFiled: November 19, 2012Date of Patent: June 11, 2013Assignee: SK Hynix Inc.Inventors: Ji-Wang Lee, Yong-Ju Kim, Sung-Woo Han, Hee-Woong Song, Ic-Su Oh, Hyung-Soo Kim, Tae-Jin Hwang, Hae-Rang Choi, Jae-Min Jang, Chang-Kun Park
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Publication number: 20130113515Abstract: An impedance control circuit includes a first impedance unit configured to terminate an impedance node using an impedance value that is determined by an impedance control code, a second impedance unit configured to terminate the impedance node using an impedance value that is determined by an impedance control voltage, a comparison circuit configured to compare a voltage level of the impedance node and a voltage level of a reference voltage, generate an up/down signal indicating whether the voltage at the impedance node is greater than the reference voltage, and generate the impedance control voltage that has a voltage level corresponding to a difference between the voltage at the impedance node and the reference voltage, and a counter unit configured to increase or decrease a value of the impedance control code in response to the up/down signal.Type: ApplicationFiled: April 13, 2012Publication date: May 9, 2013Inventor: Ji-Wang LEE
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Patent number: 8436666Abstract: An interface apparatus for a semiconductor integrated circuit and an interfacing method thereof controls the VOX of differential signals to a target level in response to the differential signals being outputted by an output block. The interface apparatus for a semiconductor integrated circuit includes an output block configured to output differential signals output by an internal circuit a detector configured to detect a timing error of the differential signals; and a controller configured to control a timing of the differential signals output by the internal circuit according to a detection result of the detector.Type: GrantFiled: December 30, 2009Date of Patent: May 7, 2013Assignee: Hynix Semiconductor Inc.Inventors: Ji-Wang Lee, Yong-Ju Kim, Hee-Woong Song, Ic-Su Oh, Hyung-Soo Kim, Tae-Jin Hwang, Hae-Rang Choi, Jae-Min Jang, Chang-Kun Park
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Patent number: 8421530Abstract: A filter circuit includes a filtering unit configured to filter an input signal and generate an output signal, and a weight generation unit configured to monitor a variation of the output signal and generate weight information based on the monitored variation.Type: GrantFiled: April 1, 2011Date of Patent: April 16, 2013Assignee: Hynix Semiconductor Inc.Inventors: Ji-Wang Lee, Shin-Deok Kang
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Patent number: 8339159Abstract: The input buffer circuit of a semiconductor apparatus includes a first buffering unit that that is activated by a voltage level difference between a first voltage terminal and a second voltage terminal, and generates a first compare signal and a second compare signal by comparing the voltage levels of reference voltage and an input signal; a control unit that controls the amount of current flowing between the second voltage terminal and a ground terminal by comparing the voltage levels of the reference voltage and the second compare signal; and a second buffering unit that generates an output signal by comparing the voltage levels of the input signal and the first compare signal.Type: GrantFiled: August 13, 2009Date of Patent: December 25, 2012Assignee: Hynix Semiconductor Inc.Inventors: Ji-Wang Lee, Yong-Ju Kim, Sung-Woo Han, Hee-Woong Song, Ic-Su Oh, Hyung-Soo Kim, Tae-Jin Hwang, Hae-Rang Choi, Jae-Min Jang, Chang-Kun Park
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Patent number: 8283804Abstract: A semiconductor IC device capable of power-sharing includes a first power line configured to be supplied with a first power, a second power line configured to be supplied with a second power, a switching block configured to connect the first power line with the second power line in response to a first control signal, and a power-sharing control block configured to generate the control signal in accordance with a plurality of operation command signals.Type: GrantFiled: December 11, 2008Date of Patent: October 9, 2012Assignee: SK hynix Inc.Inventors: Hyung-Soo Kim, Yong-Ju Kim, Sung-Woo Han, Hee-Woong Song, Ic-Su Oh, Tae-Jin Hwang, Hae-Rang Choi, Ji-Wang Lee, Jae-Min Jang, Chang-Kun Park
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Patent number: 8278981Abstract: A variable delay circuit includes at least a fixed delay unit, a first selection unit, and variable delay unit. The fixed delay unit receives an input signal and a first delay selection signal indicative of a first delay, and outputs a first delayed signal that is substantially the input signal delayed by the first delay. The first selection unit receives the input signal, the first delayed signal, and a second delay selection signal, and outputs either the input signal or the first delayed signal based on the second delay selection signal to the variable delay unit. The variable delay unit also receives a third delay selection signal indicative of a third delay, and outputs a output signal that is substantially the output signal of the selection unit delayed by a third delay. The first delay is 0 or X multiples of M delay units. The third delay is a delay selected from 0 to N delay units.Type: GrantFiled: December 14, 2009Date of Patent: October 2, 2012Assignee: Hynix Semiconductor Inc.Inventors: Hae-Rang Choi, Yong-Ju Kim, Sung-Woo Han, Hee-Woong Song, Ic-Su Oh, Hyung-Soo Kim, Tae-Jin Hwang, Ji-Wang Lee, Jae-Min Jang, Chang-Kun Park
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Patent number: 8270557Abstract: An integrated circuit includes a counter configured to perform a counting operation and output a count code value. The integrated circuit further includes an operation controller, a digital circuit and an alignment unit. The operation controller receives the count code value and generates a first control signal and a second control signal. The first control signal is generated, when the count code value is equal to a first value, which is counted by the counter prior to a target count value. The second control signal is generated, when the count code value is equal to the target count value. A digital circuit performs a first operation based on the first control signal, and output a digital signal. An alignment unit aligns the digital signal, and outputs the aligned digital signal as a final digital signal in response to the second control signal.Type: GrantFiled: December 29, 2010Date of Patent: September 18, 2012Assignee: Hynix Semiconductor Inc.Inventors: Ji-Wang Lee, Shin-Deok Kang
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Publication number: 20120161859Abstract: An internal supply voltage generating circuit includes a clock comparator configured to compare a first clock signal having clock information corresponding to a level of a reference voltage with a second clock signal having clock information corresponding to a level of an internal supply voltage, a control signal generator configured to generate a driving control voltage having a voltage level corresponding to an output signal of the clock comparator, and a driver configured to drive a terminal of the internal supply voltage in response to the driving control voltage.Type: ApplicationFiled: February 22, 2012Publication date: June 28, 2012Inventors: Yong-Ju Kim, Sung-Woo Han, Hee-Woong Song, Ic-Su Oh, Hyung-Soo Kim, Tae-Jin Hwang, Hae-Rang Choi, Ji-Wang Lee, Jae-Min Jang, Chang-Kun Park
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Publication number: 20120154030Abstract: A filter circuit includes a filtering unit configured to filter an input signal and generate an output signal, and a weight generation unit configured to monitor a variation of the output signal and generate weight information based on the monitored variation.Type: ApplicationFiled: April 1, 2011Publication date: June 21, 2012Inventors: Ji-Wang Lee, Shin-Deok Kang
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Publication number: 20120140870Abstract: An integrated circuit includes a counter configured to perform a counting operation and output a count code value. The integrated circuit further includes an operation controller, a digital circuit and an alignment unit. The operation controller receives the count code value and generates a first control signal and a second control signal. The first control signal is generated, when the count code value is equal to a first value, which is counted by the counter prior to a target count value. The second control signal is generated, when the count code value is equal to the target count value. A digital circuit performs a first operation based on the first control signal, and output a digital signal. An alignment unit aligns the digital signal, and outputs the aligned digital signal as a final digital signal in response to the second control signal.Type: ApplicationFiled: December 29, 2010Publication date: June 7, 2012Inventors: Ji-Wang LEE, Shin-Deok KANG