Patents by Inventor Han Seung Lee
Han Seung 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).
-
Patent number: 7349305Abstract: A wobble signal reproducing device and method. The wobble signal reproducing device may include a computation unit for outputting a push-pull signal by use of a signal picked up by wobbling an optical disc; a wobble band pass filter (BPF) unit for applying band pass filtering to the push-pull signal based on a first control signal, applying low pass filtering to the band pass filtering-applied signal based on a second control signal, and outputting a wobble signal; a wobble phase locked loop (PLL) unit for generating a channel clock signal based on the wobble signal, wherein the first and second control signals correspond to the channel clock signal, the wobble BPF unit applies the band pass filtering at a center frequency varying based on the first control signal, and applies the low pass filtering at a cutoff frequency varying based on the second control signal.Type: GrantFiled: January 18, 2005Date of Patent: March 25, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Han-seung Lee, Jung-eun Lee
-
Patent number: 7345527Abstract: An ultra wideband filter is provided that filters an input signal using a pair of cross-coupled transistors with a small size and small power consumption. The ultra wideband filter includes a reference current generator unit generating a reference current using a bias signal of a predetermined level, a transconductor unit that is biased by the reference current and converts a predetermined input voltage into a current of a predetermined amount to output the current if the input voltage is applied thereto, and a filter unit that outputs a predetermined output voltage corresponding to the output current of the transconductor unit using a plurality of cross-coupled transistors and capacitors. The filter unit may include cross-coupled nMOS and pMOS transistors, and first and second capacitors respectively connected to respective drain terminals of the nMOS and pMOS transistors. Accordingly, the ultra wideband filter can be designed in a minimum size.Type: GrantFiled: February 1, 2006Date of Patent: March 18, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Eun-chul Park, Han-seung Lee, Gyu-hyung Cho, Hee-seok Han
-
Patent number: 7342526Abstract: A digital-to-analog converter converts a digital input signal into an analog signal. The digital-to-analog converter includes: a power-supply unit for outputting voltages of different magnitudes through plural output terminals thereof; plural switches connected to the plural output terminals, which are controlled on and off, and are for applying the output voltages of the power-supply unit or a ground voltage to a next stage; and plural source transistors connected to the plural switches for outputting currents of magnitudes corresponding to the voltages applied from the respective connected switches of the plural switches. The plural source transistors are designed to have the same operating characteristics, thereby improving glitch characteristics.Type: GrantFiled: February 6, 2006Date of Patent: March 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jung-eun Lee, Han-seung Lee, Hoon-tae Kim
-
Patent number: 7312660Abstract: The differential amplifier and an active load are provided. The differential amplifier includes a differential input section which is configured to generate a differential current according to a differential input signal; and an active load which is configured to generate a differential output signal according to the differential current. The active load includes first and second active load sections comprising a first negative feedback loop and a second negative feedback loop, respectively; and a common mode feedback section comprising a feedback current source which supplies a feedback current to the first active load section and the second active load section to form a common mode feedback path.Type: GrantFiled: April 4, 2006Date of Patent: December 25, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Jeongwook Koh, Han Seung Lee, Hoon Tae Kim
-
Patent number: 7223582Abstract: The present invention relates to an esterase, its DNA, its overexpression and a method for preparing an optically active aryl propionic acid of formula (1) using the same in high yield, wherein R1 represents an aryl group; and R2 represents a hydrogen atom.Type: GrantFiled: June 3, 2004Date of Patent: May 29, 2007Assignee: Korea Research Institute of BioScience and BiotechnologyInventors: Bong Hyun Chung, Eun Gyo Lee, Moon Sun Hahm, Yeon Woo Ryu, Han Seung Lee
-
Publication number: 20060176202Abstract: A digital-to-analog converter converts a digital input signal into an analog signal. The digital-to-analog converter includes: a power-supply unit for outputting voltages of different magnitudes through plural output terminals thereof; plural switches connected to the plural output terminals, which are controlled on and off, and are for applying the output voltages of the power-supply unit or a ground voltage to a next stage; and plural source transistors connected to the plural switches for outputting currents of magnitudes corresponding to the voltages applied from the respective connected switches of the plural switches. The plural source transistors are designed to have the same operating characteristics, thereby improving glitch characteristics.Type: ApplicationFiled: February 6, 2006Publication date: August 10, 2006Inventors: Jung-eun Lee, Han-seung Lee, Hoon-tae Kim
-
Publication number: 20060176104Abstract: An ultra wideband filter is provided that filters an input signal using a pair of cross-coupled transistors with a small size and small power consumption. The ultra wideband filter includes a reference current generator unit generating a reference current using a bias signal of a predetermined level, a transconductor unit that is biased by the reference current and converts a predetermined input voltage into a current of a predetermined amount to output the current if the input voltage is applied thereto, and a filter unit that outputs a predetermined output voltage corresponding to the output current of the transconductor unit using a plurality of cross-coupled transistors and capacitors. The filter unit may include cross-coupled nMOS and pMOS transistors, and first and second capacitors respectively connected to respective drain terminals of the nMOS and pMOS transistors. Accordingly, the ultra wideband filter can be designed in a minimum size.Type: ApplicationFiled: February 1, 2006Publication date: August 10, 2006Inventors: Eun-chul Park, Han-seung Lee, Gyu-hyung Cho, Hee-seok Han
-
Publication number: 20060173944Abstract: An exponential function generator for generating an exponential generator to realize a linear region of about 60 dB required for the an ultra wide band system (UWB). Since the exponential function generator is implemented in a form of complementary metal oxide semiconductor fabrication (CMOS), compactness and operation control of the exponential function generator can be facilitated.Type: ApplicationFiled: January 25, 2006Publication date: August 3, 2006Inventors: Han-seung Lee, Jeongwook Koh, Jung-eun Lee, Hoang Duong, Sang-gug Lee
-
Patent number: 6933138Abstract: Disclosed are a novel gene coding for L-arabinose isomease derived from Thermotoga neapolitana 5068, a thermostable arabinose isomerase expressed from the said gene, a recombinant expression vector containing the said gene, a microorganism transformed with the said expression vector, a process for preparing thermostable arabinose isomerase from the said transformant and a process for preparing D-tagatose employing the said enzyme. Since the recombinant arabinose isomerase is highly thermostable and can produce tagatose with high yield at high temperature, it can be efficiently applied in pharmaceutical and food industries.Type: GrantFiled: June 20, 2003Date of Patent: August 23, 2005Assignee: CJ Corp.Inventors: Yu Ryang Pyun, Byoung Chan Kim, Han Seung Lee, Dong Woo Lee, Yoon Hee Lee
-
Publication number: 20050157618Abstract: A wobble signal reproducing device and method. The wobble signal reproducing device may include a computation unit for outputting a push-pull signal by use of a signal picked up by wobbling an optical disc; a wobble band pass filter (BPF) unit for applying band pass filtering to the push-pull signal based on a first control signal, applying low pass filtering to the band pass filtering-applied signal based on a second control signal, and outputting a wobble signal; a wobble phase locked loop (PLL) unit for generating a channel clock signal based on the wobble signal, wherein the first and second control signals correspond to the channel clock signal, the wobble BPF unit applies the band pass filtering at a center frequency varying based on the first control signal, and applies the low pass filtering at a cutoff frequency varying based on the second control signal.Type: ApplicationFiled: January 18, 2005Publication date: July 21, 2005Applicant: Samsung Electronics Co., Ltd.Inventors: Han-seung Lee, Jung-eun Lee
-
Publication number: 20040219594Abstract: The present invention relates to an esterase, its DNA, its overexpression and a method for preparing an optically active aryl propionic acid of formula (1) using the same in high yield, 1Type: ApplicationFiled: June 3, 2004Publication date: November 4, 2004Inventors: Bong Hyun Chung, Eun Gyo Lee, Moon Sun Hahm, Yeon Woo Ryu, Han Seung Lee
-
Patent number: 6781462Abstract: A power amplifier that utilizes a minimum amount of power, and, simultaneously, inhibits the generation of distortion is described. The power amplifier includes a differential input terminal, an output terminal, a negative feedback circuit, and an adaptive bias current control circuit. The differential input terminal receives a first voltage and a second voltage respectively through a first terminal and a second terminal, and outputs a current corresponding to a difference in the input voltages. The output terminal outputs an amplified signal corresponding to the current output by the differential input terminal. The negative feedback circuit performs negative feedback of an output voltage of the output terminal and provides the output voltage to the first terminal of the differential input terminal. The adaptive bias current control circuit controls a bias current of the output terminal according to distortion information corresponding to the difference between the first voltage and the second voltage.Type: GrantFiled: April 30, 2002Date of Patent: August 24, 2004Assignee: Fairchild Korea SemiconductorInventors: Jong-Tae Hwang, Han-Seung Lee
-
Publication number: 20040161832Abstract: The present invention relates to an esterase, its DNA, its overexpression and a method for preparing an optically active aryl propionic acid of formula (1) using the same in high yield, 1Type: ApplicationFiled: April 9, 2002Publication date: August 19, 2004Applicant: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGYInventors: Bong Hyun Chung, Eun Gyo Lee, Moon Sun Hahm, Yeon Woo Ryu, Han Seung Lee
-
Publication number: 20040058419Abstract: Disclosed are a novel gene coding for L-arabinose isomease derived from Thermotoga neapolitana 5068, a thermostable arabinose isomerase expressed from the said gene, a recombinant expression vector containing the said gene, a microorganism transformed with the said expression vector, a process for preparing thermostable arabinose isomerase from the said transformant and a process for preparing D-tagatose employing the said enzyme. Since the recombinant arabinose isomerase is highly thermostable and can produce tagatose with high yield at high temperature, it can be efficiently applied in pharmaceutical and food industries.Type: ApplicationFiled: June 20, 2003Publication date: March 25, 2004Inventors: Yu Ryang Pyun, Byoung Chan Kim, Han Seung Lee, Dong Woo Lee, Yoon Hee Lee
-
Publication number: 20030170835Abstract: The present invention relates to an esterase, its DNA, its overexpression and a method for preparing an optically active aryl propionic acid of formula (1) using the same in high yield, 1Type: ApplicationFiled: April 9, 2002Publication date: September 11, 2003Applicant: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGYInventors: Bong Hyun Chung, Eun Gyo Lee, Moon Sun Hahm, Yeon Woo Ryu, Han Seung Lee
-
Publication number: 20030076171Abstract: A power amplifier that utilizes a minimum amount of power, and, simultaneously, inhibits the generation of distortion is described. The power amplifier includes a differential input terminal, an output terminal, a negative feedback circuit, and an adaptive bias current control circuit. The differential input terminal receives a first voltage and a second voltage respectively through a first terminal and a second terminal, and outputs a current corresponding to a difference in the input voltages. The output terminal outputs an amplified signal corresponding to the current output by the differential input terminal. The negative feedback circuit performs negative feedback of an output voltage of the output terminal and provides the output voltage to the first terminal of the differential input terminal. The adaptive bias current control circuit controls a bias current of the output terminal according to distortion information corresponding to the difference between the first voltage and the second voltage.Type: ApplicationFiled: April 30, 2002Publication date: April 24, 2003Inventors: Jong-Tae Hwang, Han-Seung Lee
-
Patent number: 6466391Abstract: A head retraction circuit receives a retraction signal from a microprocessor and sequentially turns on first and second drivers connected across a voice coil motor (VCM) winding of a hard disk drive system. The retraction circuit generates a first control signal to turn on a first driver in response to receiving the retraction signal and generates a second control signal to turn on the second driver a predetermined time interval after receiving the retraction signal. The retraction circuit thereby provides current to the VCM winding to retract a head to a safety zone of a disc after the predetermined time interval so that any momentum in the VCM has substantially dissipated prior to retracting the head.Type: GrantFiled: May 24, 1999Date of Patent: October 15, 2002Assignee: Fairchild Korea Semiconductor Ltd.Inventors: Han-Seung Lee, Shi-Hong Park
-
Patent number: 6445427Abstract: A liquid crystal display device which can protect a cell region from ESD and improve a display area, is disclosed. A liquid liquid crystal display device according to the present invention, includes: a cell region arranged on the overall region of an array substrate; a gate line and a data line arranged in the shape of matrix on the cell region; an ESD protection part disposed at one side of a cross portion of the gate line and the data line, the ESD protection part protecting the gate line and the data line from ESD; and a thin film transistor disposed at the other side of the cross portion, the thin film transistor acting as a switching element.Type: GrantFiled: December 28, 1999Date of Patent: September 3, 2002Assignee: Hyundai Display Technology Inc.Inventors: Han Seung Lee, Young Hoon Kim, Young Ki Son
-
Patent number: 6433497Abstract: Disclosed is a three phase BLDC motor driving circuit which makes a BEMF voltage generated in a motor lower than a voltage source and makes a difference between the BEMF voltage and the voltage source greater than a saturation voltage of a transistor. An emitter is coupled to the voltage source and a collector is coupled to a three phase coil so that the voltage between the emitter and collector of the transistor supplying a current to the three phase coil attenuates to a first level so as not to saturate the transistor.Type: GrantFiled: May 4, 2000Date of Patent: August 13, 2002Assignee: Fairchild Korea Semiconductor Ltd.Inventor: Han-Seung Lee
-
Patent number: D548139Type: GrantFiled: March 20, 2006Date of Patent: August 7, 2007Assignee: Honda Motor Co., Ltd.Inventors: Han Seung Lee, Keisuke Asai