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公开(公告)号：GB9017560D0
公开(公告)日：1990-09-26
申请号：GB9017560
申请日：1990-08-10
Applicant: KOREA TELECOMMUNICATION
Abstract: A voice information system utilizing approximately matched input character string and key word and a method for the approximate matching thereof is disclosed. A telephone apparatus is provided to transmit a dual tone multi-frequency (DTMF) signal by utilizing a character panel including a plurality of buttons which are orderly arranged therein. An exchange apparatus is provided to intermediate the DTMF signal. A telephone line matching apparatus is connected from the exchange apparatus to detect a line status of the system and protect the system from an instantaneous higher voltage. A DTMF receiver apparatus converts the DTMF signal into a corresponding digital signal. A service provider terminal apparatus is provided to input a plurality of key words corresponding to each service name and information data to be provided. A key word storage apparatus includes a service name file unit for storing a service name file, and a key word dictionary unit for storing a key word dictionary. A text information storage apparatus stores a plurality of information data corresponding to each service name. A central processing unit converts a digital signal outputted from the DTMF receiver apparatus into an input character string to match the input character string with the key words stored in the key word storage apparatus in order to provide information data. A voice output apparatus is connected from the central processing unit, for converting a digital voice data signal into a voice signal to thereby provide the desired information service to the user.
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公开(公告)号：DE3942431A1
公开(公告)日：1990-06-28
申请号：DE3942431
申请日：1989-12-21
Applicant: ELECTRONIC & TELECOMM RES INST , KOREA TELECOMMUNICATION
Inventor： LEE BHUM CHEOL , PARK KWON CHUL
Abstract: From the clock signal of a voltage controlled oscillator there is derived a true and a phase-inverted clock. A synchroniser device synchronises NRZ data received at the input, with the true and inverse clock. A first circuit forms the phase difference between the NRZ data received at the input, and that synchronised with the true clock. A second circuit forms the phase difference between the NRZ data synchronised with the phase inverted clock and that synchronised with the phase-true clock. The outputs of the two circuits are compared together to form a phase difference, and this is used to determine the phase and frequency. Logic circuitry is described, using D flip-flop and exclusive OR gates. ADVANTAGE - Reduced jitter, in circuit using standard elements.
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公开(公告)号：GB9010055D0
公开(公告)日：1990-06-27
申请号：GB9010055
申请日：1990-05-04
Applicant: ELECTRONICS TELECOMM RES INST , KOREA TELECOMMUNICATION
Abstract: This invention provides a digital auto-phase-controlled retiming circuit which automatically locates the retiming clock phase in the center of input data eye pattern by detesting the phase difference between retiming clock and data and tracking adoptively the mutual phase variation in a case that the mutual phase difference between data and retiming clock is uncertain and changes according to time in digital transmission and/or digital signal processing systems.
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44.发明专利
公开(公告)号：DE3939635A1
公开(公告)日：1990-06-07
申请号：DE3939635
申请日：1989-11-30
Applicant: ELECTRONICS & ELECOMMU RES INS , KOREA TELECOMMUNICATION
Inventor： PARK HYUNG MOO , KIM DONG GOO
IPC: H01L29/812 , H01L21/285 , H01L21/338 , H01L29/417 , H01L29/78
Abstract: Mfr. of a self-aligned MESFET with a T-shaped tungsten gate electrode involves (a) applying a thin Si layer over the entire surface of a semi-insulating GaAs substrate by plasma-enhanced CVD, applying a Si3N4 layer by photo-CVD and ion implanting to produce an n-active layer using a photo-mask; (b) forming a gate electrode pattern by etching the Si3N4 layer using. the photo-mask; (c) selectively depositing tungsten by CVD only on the exposed Si layer and not on the Si3N4 layer; (d) thickening the tungsten in the transverse direction to form a T-shape; (e) forming an n+-layer by ion implantation using the T-shaped tungsten gate such that the gap between the gate electrode and the n+-layer is 1000-2000 Angstroms; (f) activating the n- and n+-layers using the Si layer and the Si3N4 layer as cover film; (g) ion implanting through the Si and Si3N4 layers to provide insulation between the devices; and (h) etching the Si and Si3N4 layers and applying an ohmic metallisation (AuGe/Ni) by a lift-off technique using a photo-mask to form a source and a drain. ADVANTAGE - The process minimises impurity problems caused by exposure of the GaAs layer to air and minimises mechanical damage during gate electrode application. Additionally, it avoids As evapn. during the high temp. activation process. The process is simple compared with the conventional SAINT process (self-aligned implantation of n+-layer technology).
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公开(公告)号：FR2742618B1
公开(公告)日：2004-08-27
申请号：FR9613973
申请日：1996-11-15
Applicant: KOREA TELECOMMUNICATION
Inventor： AHN KEUM HYUG , LEE YUN HO , PARK ILL HWAN , JANG CHUNG RYONG
Abstract: An identification scheme, a digital signature scheme giving message recovery, and a digital signature scheme with appendix are disclosed. In processing and transmitting information, a transmitting counterpart of a transmission message is confirmed. The unauthorized modification of the message is confirmed and transmitting behavior is detected, thereby providing the reliable information service.
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Patent Agency Ranking
公开(公告)号：HK1057632A1
公开(公告)日：2004-04-08
申请号：HK04100463
申请日：2004-01-21
Applicant: KOREA TELECOMMUNICATION
Inventor： JUNG IL-HYUNG
IPC: G06F20090101 , G06F17/30
Abstract: The present invention relates to a method and system for extracting a meaningful core word from a query and a method and system for retrieving information based on the same are disclosed. The system for retrieving extracts a meaningful core word of a lemma, expands the lemma and retrieves texts based on the expanded lemma, to thereby improve performance of the retrieval system and convenience of a user.
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公开(公告)号：GB2321571B
公开(公告)日：2001-05-16
申请号：GB9723283
申请日：1997-11-05
Applicant: KOREA ELECTRONICS TELECOMM , KOREA TELECOMMUNICATION
Inventor： NAM HONG SOON , KWON YOOL , PARK HONG SHIK
Abstract: The invention is to provide an STM-16 Network-Node Interface(NNI) which is capable of exactly checking whether a fault is generated on any station when the VC-4 AU received from a remotely located station has the fault, by checking the incoming data streams and communication with the remote node using the still unused values of APS bytes, thereby further enhancing the reliability thereof, which comprising duplicate physical layer processing blocks for processing a physical layer to provide a plurality of simplex ATM layers, and an ATM layer controller for controlling the processing condition of each of the ATM layers processed by the ATM layer processing means, to thereby processed information to the microprocessor; and ATM layer processing block for processing the ATM layers to a plurality of ATM cells.
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公开(公告)号：FR2769430B1
公开(公告)日：1999-12-10
申请号：FR9712437
申请日：1997-10-06
Applicant: KOREA TELECOMMUNICATION
Inventor： HAN IL SONG , CHOI YOUNG JAE , KIM DAE HWAN
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公开(公告)号：ID21619A
公开(公告)日：1999-07-01
申请号：ID981696
申请日：1998-12-29
Applicant: KOREA TELECOMMUNICATION
Inventor： HWANG BO HAN , RHEE MYUNG SOO , BOO KI JIN , YOON YANG MOON , KIM JONG SUP
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公开(公告)号：FR2769388A1
公开(公告)日：1999-04-09
申请号：FR9712488
申请日：1997-10-07
Applicant: KOREA TELECOMMUNICATION
Inventor： HAN IL SONG , CHOI YOUNG JAE , KIM DAE HWAN
Abstract: The multiplier includes a first current mirror (M1, M3, and M7) which forms a first current l1. A second current mirror (M2, M4, and M5) forms a second current l2. The second current mirror is coupled in parallel to the first mirror. The multiplier outputs an output current by subtracting the second current from the first current. The output current represents the result of multiplying input voltages V1 and V2.
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