Patents by Inventor Il-won Seo
Il-won Seo 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: 8045625Abstract: An encoding method includes partitioning an input stream into first sub-blocks and second sub-blocks, encoding the second sub-blocks based on a number and location of reference sub-blocks to generate third sub-blocks when at least one of the first sub-blocks corresponds to a forbidden pattern, and rearranging the first sub-blocks and the third sub-blocks to generate an output stream. The reference sub-blocks indicate the second sub-blocks that correspond to a reference pattern and the third sub-blocks includes a redundant information sub-block and non-redundant information sub-blocks. Thus, the encoding method may properly control a direct current (DC) component.Type: GrantFiled: July 30, 2007Date of Patent: October 25, 2011Assignee: SAMSUNG Electronics Co., Ltd.Inventor: Il-Won Seo
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Patent number: 7936655Abstract: A read circuit of a disk drive system that adaptively reduces signal-dependent noise including a sequence detector, a signal-dependent adaptive engine and a signal-dependent post-processor. The sequence detector recovers a data sequence from equalized data. The signal-dependent adaptive engine generates signal-dependent coefficients, a mean value and a standard deviation of a signal-dependent error. The signal-dependent post-processor corrects the signal-dependent error.Type: GrantFiled: July 24, 2007Date of Patent: May 3, 2011Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Ju-Hyung Hong, Il-Won Seo, Hyun-Wook Lim
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Patent number: 7587013Abstract: For updating a gain of a loop filter from a timing error signal, a timing signal estimator generates a current timing signal estimation value from a prior timing error estimation value, a prior gain value, and a prior timing signal estimation value. A timing error estimator generates a current timing error estimation value from a timing error accumulation value and the current timing signal estimation value. A current gain value of the loop filter is determined from the current timing error estimation value.Type: GrantFiled: July 31, 2006Date of Patent: September 8, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Il-Won Seo, Jong-Shin Shin
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Patent number: 7558311Abstract: A spread spectrum clock generator (SSCG) and method of generating a spread spectrum clock (SSC) signal, in which the SSCG may include a controller outputting a given modulation voltage signal based on a difference between an average frequency of a first feedback signal and a comparison frequency signal input thereto, or based on comparison in total phase variations between a second feedback signal and the comparison frequency signal, and a sub-system for generating a first control voltage as a function of an input reference frequency signal and a second feedback signal input thereto. An adder may add the first control voltage signal and the modulation voltage signal to generate a second control voltage signal, and a voltage control oscillator (VCO) may generate the SSC signal based on the second control voltage signal.Type: GrantFiled: August 17, 2005Date of Patent: July 7, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-shin Shin, Duck-hyun Chang, Ji-young Kim, Myoung-bo Kwak, Il-won Seo, Jae-Hyun Park, Hyun-goo Kim, Chi-won Kim
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Publication number: 20090150088Abstract: Disclosed herein is a method of analyzing the behavior of pollutants in a stream through the prediction of a transverse dispersion coefficient.Type: ApplicationFiled: January 31, 2008Publication date: June 11, 2009Inventors: Il-Won SEO, Tae-Myoung JEON, Kyung-Oh BAEK
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Patent number: 7545861Abstract: A timing recovery circuit for a receiver may include a timing error detector that generates a timing error based on differences between coefficients of a feed-forward filter and a feed-back filter. The timing recovery circuit may include a loop filter which generates a control voltage signal based on the timing error, and a voltage controlled oscillator that generates a sampling clock for the receiver based on the generated control voltage signal.Type: GrantFiled: August 13, 2004Date of Patent: June 9, 2009Assignee: Samsung Electronics Co., Ltd.Inventor: Il-Won Seo
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Publication number: 20080031364Abstract: An encoding method includes partitioning an input stream into first sub-blocks and second sub-blocks, encoding the second sub-blocks based on a number and location of reference sub-blocks to generate third sub-blocks when at least one of the first sub-blocks corresponds to a forbidden pattern, and rearranging the first sub-blocks and the third sub-blocks to generate an output stream. The reference sub-blocks indicate the second sub-blocks that correspond to a reference pattern and the third sub-blocks includes a redundant information sub-block and non-redundant information sub-blocks. Thus, the encoding method may properly control a direct current (DC) component.Type: ApplicationFiled: July 30, 2007Publication date: February 7, 2008Applicant: Samsung Electronics Co., Ltd.Inventor: Il-Won SEO
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Publication number: 20080031114Abstract: A read circuit of a disk drive system that adaptively reduces signal-dependent noise including a sequence detector, a signal-dependent adaptive engine and a signal-dependent post-processor. The sequence detector recovers a data sequence from equalized data. The signal-dependent adaptive engine generates signal-dependent coefficients, a mean value and a standard deviation of a signal-dependent error. The signal-dependent post-processor corrects the signal-dependent error.Type: ApplicationFiled: July 24, 2007Publication date: February 7, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Ju-Hyung HONG, Il-Won Seo, Hyun-Wook Lim
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Publication number: 20070036253Abstract: For updating a gain of a loop filter from a timing error signal, a timing signal estimator generates a current timing signal estimation value from a prior timing error estimation value, a prior gain value, and a prior timing signal estimation value. A timing error estimator generates a current timing error estimation value from a timing error accumulation value and the current timing signal estimation value. A current gain value of the loop filter is determined from the current timing error estimation value.Type: ApplicationFiled: July 31, 2006Publication date: February 15, 2007Inventors: Il-Won Seo, Jong-Shin Shin
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Publication number: 20060170459Abstract: A multiplexer and methods thereof. In an example, the multiplexer may receive a first periodic signal with a first active duration and a second periodic signal with a second active duration, the first and second active durations not overlapping. The multiplexer may transition statuses of first and second transmission gates based on the first and second periodic signals, respectively, such that each of the first and second transmission gates are set to the same status during at least one time period (e.g., between the first and second active durations where both the first and second periodic signals are inactive). In a further example, the example multiplexer may include first and second transmission gates receiving first and second input signals which may be controlled by the first and second control signals.Type: ApplicationFiled: January 27, 2006Publication date: August 3, 2006Inventors: Jong-Shin Shin, Ji-Young Kim, Myoung-Bo Kwak, Il-Won Seo, Chi-Won Kim, Hyun-Goo Kim, Jae-Hyun Park
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Publication number: 20060158358Abstract: In a timing recovery method, two consecutive sampling values may be generated based on a sampled input signal. The input signal may be sampled according to a phase interval of a sampling clock. A slope between the two consecutive sampling values may be calculated, and a difference between a target slope and the calculated slope may be determined. A phase of the sampling clock may be compensated based on the difference between the target slope and the calculated slope.Type: ApplicationFiled: December 22, 2005Publication date: July 20, 2006Inventors: Il-Won Seo, Jae-Hwan Ahn
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Publication number: 20060098714Abstract: A spread spectrum clock generator (SSCG) and method of generating a spread spectrum clock (SSC) signal, in which the SSCG may include a controller outputting a given modulation voltage signal based on a difference between an average frequency of a first feedback signal and a comparison frequency signal input thereto, or based on comparison in total phase variations between a second feedback signal and the comparison frequency signal, and a sub-system for generating a first control voltage as a function of an input reference frequency signal and a second feedback signal input thereto. An adder may add the first control voltage signal and the modulation voltage signal to generate a second control voltage signal, and a voltage control oscillator (VCO) may generate the SSC signal based on the second control voltage signal.Type: ApplicationFiled: August 17, 2005Publication date: May 11, 2006Inventors: Jong-shin Shin, Duck-hyun Chang, Ji-young Kim, Myoung-bo Kwak, Il-won Seo, Jae-Hyun Park, Hyun-goo Kim, Chi-won Kim
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Publication number: 20050084046Abstract: A timing recovery circuit for a receiver may include a timing error detector that generates a timing error based on differences between coefficients of a feed-forward filter and a feed-back filter. The timing recovery circuit may include a loop filter which generates a control voltage signal based on the timing error, and a voltage controlled oscillator that generates a sampling clock for the receiver based on the generated control voltage signal.Type: ApplicationFiled: August 13, 2004Publication date: April 21, 2005Inventor: Il-Won Seo
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Patent number: 6590421Abstract: A semiconductor capable of reducing skew between plural-bit output data by using a plurality of data output drivers and a method thereof. Each data output driver comprises a driver connected between an external power voltage and an external ground voltage, for pulling-up the output data in response to a first state of input data and for pulling-down the output data in response to a second state of the input data; a first delay circuit for varying transition delay time of the input data having the first state in response to signals received from other data output drivers; and a second delay circuit for varying transition delay time of the input data having the second state in response to signals received from other data output drivers.Type: GrantFiled: March 19, 2002Date of Patent: July 8, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Hoe-Ju Chung, Kyu-Hyoun Kim, Il-Won Seo, Moo-Sung Chae
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Patent number: 6525584Abstract: A digital phase interpolator including a plurality of delay stages to control delay time of an output signal from first and second input signals having different phase delays. The plurality of delay stages are connected serially, have a same internal structure, determine corresponding axes for interpolation in each stage, and each includes a first inverting section for inverting first and second signal inputs from the previous stage, a phase blender for blending outputs of the first inverting section, a second inverting section for inverting outputs of the first inverting section, and a multiplexer for generating input signals for the next stage in response to a selection signal for determining phase delay time of the output signal of the phase interpolator. Total area and current may be reduced by the present invention because the number of inverters comprising each stage is equal.Type: GrantFiled: November 15, 2001Date of Patent: February 25, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Il-won Seo, Kyu-hyun Kim
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Publication number: 20030006817Abstract: A digital phase interpolator including a plurality of delay stages to control delay time of an output signal from first and second input signals having different phase delays. The plurality of delay stages are connected serially, have a same internal structure, determine corresponding axes for interpolation in each stage, and each includes a first inverting section for inverting first and second signal inputs from the previous stage, a phase blender for blending outputs of the first inverting section, a second inverting section for inverting outputs of the first inverting section, and a multiplexer for generating input signals for the next stage in response to a selection signal for determining phase delay time of the output signal of the phase interpolator. Total area and current may be reduced by the present invention because the number of inverters comprising each stage is equal.Type: ApplicationFiled: November 15, 2001Publication date: January 9, 2003Inventors: Il-Won Seo, Kyu-Hyun Kim
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Publication number: 20020149403Abstract: A semiconductor capable of reducing skew between plural-bit output data by using a plurality of data output drivers and a method thereof. Each data output driver comprises a driver connected between an external power voltage and an external ground voltage, for pulling-up the output data in response to a first state of input data and for pulling-down the output data in response to a second state of the input data; a first delay circuit for varying transition delay time of the input data having the first state in response to signals received from other data output drivers; and a second delay circuit for varying transition delay time of the input data having the second state in response to signals received from other data output drivers.Type: ApplicationFiled: March 19, 2002Publication date: October 17, 2002Inventors: Hoe-Ju Chung, Kyu-Hyoun Kim, Il-Won Seo, Moo-Sung Chae