Patents by Inventor Inyeol Lee
Inyeol 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: 9871516Abstract: In one embodiment, an apparatus for transmitting a signal with an improved termination is disclosed. The apparatus includes a driver to generate a differential mode signal superimposed on a common mode signal at a differential driver output of the driver. The differential driver output includes a first driver output and a second driver output. The apparatus also includes a termination circuit coupled between the first driver output and the second driver output. The termination circuit includes a capacitor connected to a node. The termination circuit also includes a first resistor and a first inductive element coupled in series between the first driver output and the node. In addition, the termination circuit includes a second resistor and a second inductive element coupled in series between the second driver output and the node.Type: GrantFiled: June 4, 2014Date of Patent: January 16, 2018Assignee: Lattice Semiconductor CorporationInventors: Youchul Jeong, Junwoo Lee, Inyeol Lee, Baegin Sung
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Patent number: 9490965Abstract: Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.Type: GrantFiled: June 4, 2015Date of Patent: November 8, 2016Assignee: Lattice Semiconductor CorporationInventors: Inyeol Lee, Baegin Sung, Hanwoong Sohn, Shinje Tahk, Sun Woo Baek, Chandlee B. Harrell
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Patent number: 9477244Abstract: Embodiments of the invention are generally directed to a linear regulator with improved power supply ripple rejection. An embodiment of an apparatus includes an linear regulator to receive a system power supply and to generate a regulated power supply; a first voltage reference generator to generate a first voltage reference for the linear regulator; a second voltage reference generator to generate a second voltage reference for the linear regulator; and a voltage reference and power switcher. In some embodiments, the voltage reference and power switcher is to switch a voltage reference for the linear regulator from the first voltage reference to the second voltage reference and is to switch a part of a power supply for the linear regulator from the system power supply to the regulated power supply.Type: GrantFiled: January 10, 2014Date of Patent: October 25, 2016Assignee: Lattice Semiconductor CorporationInventors: Kexin Luo, Fangqing Chu, Yu Shen, Zhi Wu, Inyeol Lee
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Patent number: 9344081Abstract: Embodiments of the invention are generally directed to a line driver with separate pre-driver for feed-through capacitance. An embodiment of an apparatus includes a differential pair of transistors to generate an output signal on a first output node and a second output node; a pass-through capacitance coupled with the first output node and the second output node; a first pre-driver to drive an input signal for the differential transistors; and a second pre-driver to drive the input signal for the pass-through capacitance.Type: GrantFiled: March 15, 2013Date of Patent: May 17, 2016Assignee: Lattice Semiconductor CorporationInventors: Kexin Luo, Fangqing Chu, Huaizhou Yang, Yu Shen, Inyeol Lee
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Publication number: 20160085250Abstract: Embodiments of the invention are generally directed to a linear regulator with improved power supply ripple rejection. An embodiment of an apparatus includes an linear regulator to receive a system power supply and to generate a regulated power supply; a first voltage reference generator to generate a first voltage reference for the linear regulator; a second voltage reference generator to generate a second voltage reference for the linear regulator; and a voltage reference and power switcher. In some embodiments, the voltage reference and power switcher is to switch a voltage reference for the linear regulator from the first voltage reference to the second voltage reference and is to switch a part of a power supply for the linear regulator from the system power supply to the regulated power supply.Type: ApplicationFiled: January 10, 2014Publication date: March 24, 2016Inventors: Kexin Luo, Fangqing CHU, Yu Shen, Zhi Wu, Inyeol Lee
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Publication number: 20150358020Abstract: In one embodiment, an apparatus for transmitting a signal with an improved termination is disclosed. The apparatus includes a driver to generate a differential mode signal superimposed on a common mode signal at a differential driver output of the driver. The differential driver output includes a first driver output and a second driver output. The apparatus also includes a termination circuit coupled between the first driver output and the second driver output. The termination circuit includes a capacitor connected to a node. The termination circuit also includes a first resistor and a first inductive element coupled in series between the first driver output and the node. In addition, the termination circuit includes a second resistor and a second inductive element coupled in series between the second driver output and the node.Type: ApplicationFiled: June 4, 2014Publication date: December 10, 2015Inventors: Youchul Jeong, Junwoo Lee, Inyeol Lee, Baegin Sung
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Publication number: 20150270946Abstract: Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.Type: ApplicationFiled: June 4, 2015Publication date: September 24, 2015Inventors: Inyeol Lee, Baegin Sung, Hanwoong Sohn, Shinje Tahk, Sun Woo Baek, Chandlee B. Harrell
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Publication number: 20150222261Abstract: Embodiments of the invention are generally directed to a line driver with separate pre-driver for feed-through capacitance. An embodiment of an apparatus includes a differential pair of transistors to generate an output signal on a first output node and a second output node; a pass-through capacitance coupled with the first output node and the second output node; a first pre-driver to drive an input signal for the differential transistors; and a second pre-driver to drive the input signal for the pass-through capacitance.Type: ApplicationFiled: March 15, 2013Publication date: August 6, 2015Inventors: Kexin Luo, Fangqing Chu, Huaizhou Yang, Yu Shen, Inyeol Lee
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Patent number: 9071410Abstract: Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.Type: GrantFiled: January 7, 2015Date of Patent: June 30, 2015Assignee: Silicon Image, Inc.Inventors: Inyeol Lee, Baegin Sung, Hanwoong Sohn, Shinje Tahk, Sun Woo Baek, Chandlee B. Harrell
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Publication number: 20150117580Abstract: Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.Type: ApplicationFiled: January 7, 2015Publication date: April 30, 2015Inventors: Inyeol Lee, Baegin Sung, Hanwoong Sohn, Shinje Tahk, Sun Woo Baek, Chandlee B. Harrell
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Patent number: 8958497Abstract: Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.Type: GrantFiled: March 15, 2013Date of Patent: February 17, 2015Assignee: Silicon Image, Inc.Inventors: Inyeol Lee, Baegin Sung, Hanwoong Sohn, Shinje Tahk, Sun Woo Baek, Chandlee B. Harrell
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Publication number: 20130329828Abstract: Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.Type: ApplicationFiled: March 15, 2013Publication date: December 12, 2013Applicant: Silicon Image, Inc.Inventors: Inyeol Lee, Baegin Sung, Hanwoong Sohn, Shinje Tahk, Sun Woo Baek, Chandlee B. Harrell
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Patent number: 8275914Abstract: Discovery of connections utilizing a control bus. An embodiment of a method includes detecting a transition of a control bus from a high state to a low state by a source device, the source device being configured to be coupled with a sink device via an interface, the interface including the control bus, the source device including a pullup device and the sink device including a pulldown device; pulsing the control bus to a high state at the source device; and upon detecting by the source device that the control bus remains in the high state ceasing the pulsing of the control bus to the high state, and transitioning the source device from a disconnected state to a connected state.Type: GrantFiled: October 12, 2009Date of Patent: September 25, 2012Assignee: Silicon Image, Inc.Inventors: Jason Seung-Min Kim, Inyeol Lee, Shrikant Ranade, Daeyun Shim
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Publication number: 20100104029Abstract: Methods and apparatuses for using single-ended common mode signaling, additional data can be transferred in backward, forward, and/or both directions over an existing differential pair connection without adding extra wire.Type: ApplicationFiled: October 21, 2009Publication date: April 29, 2010Inventors: Inyeol Lee, Daeyun Shim, Ook Kim, Gyudong Kim
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Publication number: 20100100200Abstract: Discovery of connections utilizing a control bus. An embodiment of a method includes detecting a transition of a control bus from a high state to a low state by a source device, the source device being configured to be coupled with a sink device via an interface, the interface including the control bus, the source device including a pullup device and the sink device including a pulldown device;pulsing the control bus to a high state at the source device; and upon detecting by the source device that the control bus remains in the high state ceasing the pulsing of the control bus to the high state, and transitioning the source device from a disconnected state to a connected state.Type: ApplicationFiled: October 12, 2009Publication date: April 22, 2010Inventors: Jason Seung-Min Kim, Inyeol Lee, Shrikant Ranade, Daeyun Shim
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Patent number: 6809567Abstract: A system and method for multiple-phase clock generation is disclosed. In one embodiment, a multiple-stage voltage controlled oscillator (“VCO”) transmits a plurality of clock phases to a clock divider circuit which produces the desired number of clock phase outputs. The clock divider circuit in this embodiment includes a state machine, e.g., a modified Johnson counter, that provides a plurality of divided down clock phases, each of which is connected to a separate modified shift register. Each modified shift register contains D-type flip-flops and each D-type flip-flop provides a separate clock phase output. In one embodiment the number of clock phase outputs of the multiple-phase clock is a function of the number of VCO clock phases times the number of desired states in the modified Johnson counter.Type: GrantFiled: November 20, 2001Date of Patent: October 26, 2004Assignee: Silicon ImageInventors: Ook Kim, Hung Sung Li, Inyeol Lee, Gyudong Kim, Yongman Lee
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Patent number: 6717478Abstract: A voltage controlled oscillator (“VCO”) circuit capable of generating signals with reduced jitter and/or low-phase noise is provided. One embodiment provides a plurality of cascaded VCO cells, where each VCO cell can include a source coupled differential pair, a bias transistor connected to the differential pair for biasing the differential pair, a resistive load pair connected to the differential pair, and a voltage controlled capacitor pair or varactor pair connected to the differential pair. The varactors provide control over the frequency of the oscillations produced by the VCO circuit in combination with a control voltage. A phase frequency detector combined with a charge pump and loop filter provide the control voltage.Type: GrantFiled: November 20, 2001Date of Patent: April 6, 2004Assignee: Silicon ImageInventors: Ook Kim, Hung Sung Li, Inyeol Lee, Gyudong Kim, Yongman Lee