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公开(公告)号：FR2788393A1
公开(公告)日：2000-07-13
申请号：FR9915341
申请日：1999-12-06
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , BANG SEUNG CHAN , SHIM JAE RYONG , HAN KI CHUL
Abstract: The common channel direct access code division multiplexed access system has multiple terminals (100) transmitting digital words to a base post (200) using a communications channel. The base post receives digital word signals with front end codes, which are not address related, being selected by each of the multiple terminals. The base post searches all possible front end codes, to acquire the signal. If the base post acquires the front end code the terminal transmits the digital words, otherwise re transmitting the front end code.
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公开(公告)号：FR2788393B1
公开(公告)日：2007-04-06
申请号：FR9915341
申请日：1999-12-06
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , BANG SEUNG CHAN , SHIM JAE RYONG , HAN KI CHUL
Abstract: The invention relates to packet and random access in which multiple terminals (eg mobile phones) transmit data via a common code division multiple access (CDMA) Channel Terminals select one of available preamble signatures and one of available access slots and transmit a preamble (Fig.5). A base station tries to acquire the preamble and then broadcasts to all terminals whether the preambles are acquired or not (Fig.6). The terminals then transmit a data or retransmit a preamble according to the result of the preamble acquirement (Fig.5). The apparatus and method have improved network efficiency by reducing unnecessary data transmission and interference signal. An improved characteristic of time delay by ramping to adequate power level more quickly by re-transmitting preamble-by-preamble.
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公开(公告)号：AT370505T
公开(公告)日：2007-09-15
申请号：AT05105264
申请日：2005-06-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , KIM SANG HYEOB , KIM HYE JIN , CHO DOO HEE
Abstract: Provided is a microelectromechanical system (MEMS) actuator in which a cantilever piezoelectric actuator and a comb actuator are combined to perform dual shaft drive. The MEMS includes: a stationary comb (10) fixed on a substrate; a movable comb (11) disposed separately from the substrate; and a spring (12) connected to the movable comb and the substrate to resiliently support the movable comb, wherein the movable comb includes a piezoelectric material layer (111d) in a laminated manner to be perpendicularly moved by a piezoelectric phenomenon and laterally moved by an electrostatic force to the stationary comb, whereby the MEMS actuator can be used in a driving apparatus of an ultra-slim optical disk drive since the movable comb is made of a piezoelectric material to simultaneously perform focusing actuation to a Z-axis as well as planar actuation.
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公开(公告)号：SG122872A1
公开(公告)日：2006-06-29
申请号：SG200504085
申请日：2005-06-24
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM SANG HYEOB , KIM KI CHUL , KIM HYE JIN
Abstract: Provided are a structure for an optical device and method of fabricating the same. The structure includes: a light scattering layer producing nanoparticles due to externally provided thermal energy; a protective layer protecting the light scattering layer; and a capping layer disposed between the light scattering layer and the protective layer. As the light scattering layer is formed of nitride-oxide, an energy gap is increased to make the structure suitable for a high-speed electronic circuit, and a desired stoichiometric ratio can be easily obtained. Also, the capping layer prevents crystalline mismatch, thus the non-uniformity of elements is inhibited to maintain a stoichiometric state. As a result, a high-integrated high-speed electronic circuit, which is excellent in uniformity and reproducibility, can be easily embodied.
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Patent Agency Ranking
公开(公告)号：DE4345029C2
公开(公告)日：1999-10-28
申请号：DE4345029
申请日：1993-12-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , MIN BYUNG KI
Abstract: A discrete cosine transform circuit including a shuffle circuit with n (n is an integer) shuffle stages, the n shuffle stages sequentially having 2n, 2n-1, . . . , 21 input/output stages in such a manner that a first one of the n shuffle stages has the 2n input/output stages and a nth one of the n shuffle stages has the 21 input/output stages, the nth shuffle stage including first and second RACs for performing a discrete cosine transform using a distributed arithmetic process, the first RAC having 2n-2 input/output stages, the second RAC having 2n-1 input/output stages. A path switching section is connected to the input stages of the shuffle circuit for changing a transfer path of output information from the output stages of the shuffle circuit according to whether the discrete cosine transform to be processed is a forward discrete cosine transform or an inverse discrete cosine transform. A first selection section is connected to the input stages of the first RAC and a second selection section is connected to the input stages of the second RAC. The first and second selection sections select information according to whether the discrete cosine transform to be processed is the forward discrete cosine transform or the inverse discrete cosine transform and apply the selected information to the first and second RACs, respectively.
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公开(公告)号：DE602005002010T2
公开(公告)日：2008-05-15
申请号：DE602005002010
申请日：2005-06-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , KIM SANG HYEOB , KIM HYE JIN , CHO DOO HEE
Abstract: Provided is a microelectromechanical system (MEMS) actuator in which a cantilever piezoelectric actuator and a comb actuator are combined to perform dual shaft drive. The MEMS includes: a stationary comb (10) fixed on a substrate; a movable comb (11) disposed separately from the substrate; and a spring (12) connected to the movable comb and the substrate to resiliently support the movable comb, wherein the movable comb includes a piezoelectric material layer (111d) in a laminated manner to be perpendicularly moved by a piezoelectric phenomenon and laterally moved by an electrostatic force to the stationary comb, whereby the MEMS actuator can be used in a driving apparatus of an ultra-slim optical disk drive since the movable comb is made of a piezoelectric material to simultaneously perform focusing actuation to a Z-axis as well as planar actuation.
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公开(公告)号：DE602005002010D1
公开(公告)日：2007-09-27
申请号：DE602005002010
申请日：2005-06-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , KIM SANG HYEOB , KIM HYE JIN , CHO DOO HEE
Abstract: Provided is a microelectromechanical system (MEMS) actuator in which a cantilever piezoelectric actuator and a comb actuator are combined to perform dual shaft drive. The MEMS includes: a stationary comb (10) fixed on a substrate; a movable comb (11) disposed separately from the substrate; and a spring (12) connected to the movable comb and the substrate to resiliently support the movable comb, wherein the movable comb includes a piezoelectric material layer (111d) in a laminated manner to be perpendicularly moved by a piezoelectric phenomenon and laterally moved by an electrostatic force to the stationary comb, whereby the MEMS actuator can be used in a driving apparatus of an ultra-slim optical disk drive since the movable comb is made of a piezoelectric material to simultaneously perform focusing actuation to a Z-axis as well as planar actuation.
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公开(公告)号：SG123655A1
公开(公告)日：2006-07-26
申请号：SG200504101
申请日：2005-06-24
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , KIM SANG HYEOB , KIM HYE JIN , CHO DOO HEE
Abstract: Provided is a microelectromechanical system (MEMS) actuator in which a cantilever piezoelectric actuator and a comb actuator are combined to perform dual shaft drive. The MEMS includes: a stationary comb (10) fixed on a substrate; a movable comb (11) disposed separately from the substrate; and a spring (12) connected to the movable comb and the substrate to resiliently support the movable comb, wherein the movable comb includes a piezoelectric material layer (111d) in a laminated manner to be perpendicularly moved by a piezoelectric phenomenon and laterally moved by an electrostatic force to the stationary comb, whereby the MEMS actuator can be used in a driving apparatus of an ultra-slim optical disk drive since the movable comb is made of a piezoelectric material to simultaneously perform focusing actuation to a Z-axis as well as planar actuation.
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公开(公告)号：DE4345029A1
公开(公告)日：1994-07-07
申请号：DE4345029
申请日：1993-12-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , MIN BYUNG KI
Abstract: A discrete cosine transform circuit including a shuffle circuit with n (n is an integer) shuffle stages, the n shuffle stages sequentially having 2n, 2n-1, . . . , 21 input/output stages in such a manner that a first one of the n shuffle stages has the 2n input/output stages and a nth one of the n shuffle stages has the 21 input/output stages, the nth shuffle stage including first and second RACs for performing a discrete cosine transform using a distributed arithmetic process, the first RAC having 2n-2 input/output stages, the second RAC having 2n-1 input/output stages. A path switching section is connected to the input stages of the shuffle circuit for changing a transfer path of output information from the output stages of the shuffle circuit according to whether the discrete cosine transform to be processed is a forward discrete cosine transform or an inverse discrete cosine transform. A first selection section is connected to the input stages of the first RAC and a second selection section is connected to the input stages of the second RAC. The first and second selection sections select information according to whether the discrete cosine transform to be processed is the forward discrete cosine transform or the inverse discrete cosine transform and apply the selected information to the first and second RACs, respectively.
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