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公开(公告)号:GB2284942A
公开(公告)日:1995-06-21
申请号:GB9425244
申请日:1994-12-14
Applicant: KOREA ELECTRONICS TELECOMM , KOREA TELECOMMUNICATION
Inventor: SUNG HEE KYUNG , LEE CHANG HWA , KIM TAE HONG , LEE SANG SEOK , CHOI TAE GOO
Abstract: A dielectric resonator comprises a dielectric block 301 with a first electrode 305 formed on a first surface 302 and a second electrode 304 formed within an inner conductive hole 303 extending from the surface opposite the first surface 302, towards but not reaching the first surface 302, such that the first and second electrodes 304, 305 face each other to form a coupling capacitor and a conductive layer formed on one or more of the remaining surfaces. The resonators may be combined to form a filter arrangement. The filter may include window and groove arrangements to adjust the coupling between the resonators. The inner conductive hole 303 may have a circular, elliptical or quadrilateral cross sectional shape. The first electrode 305 may extend to an edge of the dielectric block 301 to form a connection terminal allowing direct surface mounting on to a circuit board.
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公开(公告)号:GB2261093B
公开(公告)日:1995-06-21
申请号:GB9213382
申请日:1992-06-24
Applicant: KOREA TELECOMMUNICATION
Inventor: HAN IL SONG
Abstract: A MOSFET controlling multiplier for obtaining the precise function of the operational multiplication by offsetting the offset voltage of MOSFET to remove the non-linear current of MOSFET, utilizing symmetrical voltage sources and a current mirror circuit is disclosed. The MOSFET controlling multiplier utilizes a MOSFET linear means for linearly varying the output current I to a node A in accordance with an input voltage from an input voltage source Vg and a symmetrical input voltage from voltage sources Vx and -Vx. The input voltage from the input voltage source Vg is operatively associated with the symmetrical input voltage from the voltage sources Vx and -Vx. An impedance element Z outputs a voltage Vo, with the impedance element Z being connected to the node A of the MOSFET linear means and the ground.
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公开(公告)号:GB9425603D0
公开(公告)日:1995-02-15
申请号:GB9425603
申请日:1994-12-19
Applicant: KOREA ELECTRONICS TELECOMM , KOREA TELECOMMUNICATION
IPC: H01L21/331 , H01L21/762
Abstract: Disclosed is a fabrication of a bipolar transistor using an enhanced trench isolation so as to improve integration and performance thereof, comprising the steps of sequentially etching back portions corresponding to a trench using a trench forming mask to a predetermined depth of the buried collector to form the trench; filling an isolation insulating layer into the trench; polishing the isolation insulating layer up to a surface of the silicon oxide layer; sequentially forming a second insulating layer on the isolating insulating layer and the silicon oxide layer; removing the first polysilicon layer and the first insulating layer formed on an inactive region other than an active region defined by the trench; thermal-oxidizing the collector layer formed on the inactive region to form a thermal oxide layer; removing the second insulating layer and sequentially forming a third polysilicon, a third insulating layer and a second nitride layer; etching back layers formed on a portion of the first insulating layer to form an opening in the active region; forming a first side wall on both edges of the opening and removing the first insulating layer; forming an intrinsic base at a region where the first insulating layer is removed to electrically connect the intrinsic base with an extrinsic base in self-alignment; forming a second side wall on both sides of the first side wall; and forming an emitter layer on the intrinsic base.
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公开(公告)号:CH684855A5
公开(公告)日:1995-01-13
申请号:CH224092
申请日:1992-07-16
Applicant: KOREA TELECOMMUNICATION
Inventor: HAN IL SONG
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公开(公告)号:AT398010B
公开(公告)日:1994-08-25
申请号:AT144692
申请日:1992-07-15
Applicant: KOREA TELECOMMUNICATION
Abstract: A MOSFET controlling multiplier for obtaining the precise function of the operational multiplication by offsetting the offset voltage of MOSFET to remove the non-linear current of MOSFET, utilizing symmetrical voltage sources and a current mirror circuit is disclosed. The MOSFET controlling multiplier utilizes a MOSFET linear means for linearly varying the output current I to a node A in accordance with an input voltage from an input voltage source Vg and a symmetrical input voltage from voltage sources Vx and -Vx. The input voltage from the input voltage source Vg is operatively associated with the symmetrical input voltage from the voltage sources Vx and -Vx. An impedance element Z outputs a voltage Vo, with the impedance element Z being connected to the node A of the MOSFET linear means and the ground.
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公开(公告)号:FR2699358A1
公开(公告)日:1994-06-17
申请号:FR9314920
申请日:1993-12-13
Applicant: TELECOMMUNICATIONS ELECT , KOREA TELECOMMUNICATION
Inventor: HONG SEON MI , KIM TAE IL , LEE HYEONG HO , LEE CHUNG KUN , CHOI GO BONG , KIM YOUNG SI , KIM YONG BEOM , KIM CHEON SOO
Abstract: The operation of the logic depends on a switching centre (SSP). When an urban centre call (101) is sent out, the switching centre receives a number (103) via the R2MFC signalling method. The centre determines (104) whether this is a call for services, via the intelligent network or a normal call. If it is a normal call it switches to the R2MFC network (105). If it is a call for services, the centre determines whether it is a credit rating call (108). If it is not, the call is switched to the intelligent service network (111) via R2MFC signalling (110). In the case of a credit assessment call, the R2MFC signalling is freed (114), and the path for the call is determined (115). The two tone signalling (116) is put into operation. The sender is then asked for his identity number (118), and following the receipt of this, the message is released (119). At the same time, the callers telephone number (121) is stored for future charging. Following the call the signalling path is cleared. USE/ADVANTAGE - Allows existing method of inter-urban connection to be used with two tone subscriber signalling.
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公开(公告)号:CA2115838A1
公开(公告)日:1994-01-26
申请号:CA2115838
申请日:1993-06-18
Applicant: KOREA TELECOMMUNICATION
Inventor: KWON SOON H , KIM EUN H , JIN BYUNG W , JOO WOON Y
Abstract: PCT No. PCT/KR93/00050 Sec. 371 Date Jun. 27, 1994 Sec. 102(e) Date Jun. 27, 1994 PCT Filed Jun. 18, 1993 PCT Pub. No. WO94/00828 PCT Pub. Date Jan. 6, 1994A coin treatment apparatus is disclosed that includes structure for selecting the inserted coins based upon their size, in accordance with their specific currency units, and transferring the coins to a receiving space. Once in the receiving space, coins of the correct currency unit are moved to their respective receiving containers within a receiving box. Coins that are not of the correct currency unit are transferred to a separate receiving space and discharged from the apparatus.
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公开(公告)号:ATA144592A
公开(公告)日:1993-08-15
申请号:AT144592
申请日:1992-07-15
Applicant: KOREA TELECOMMUNICATION
Abstract: A MOSFET analog multiplier with a variable resistive MOSFET linear means for linearly varying output current I depending upon a symmetrical input voltage from voltage sources V2 and -V2 and an input voltage from an input voltage source V1 operatively associated with the symmetrical input voltage from the voltage source V2 and -V2, with the variable resistive MOSFET linear means having a node A to output the varied output current I therethrough is disclosed. An operational amplifying unit for amplifying the linearly varied output current I and which includes an operational amplifier U with an inverting input terminal connected to the node A of the MOSFET linear means, a non-inverting input terminal connected to ground, and an output terminal. The operational amplifying unit further includes a feedback element Z connected between the inverting input terminal and the output terminal of the operational amplifier U, where in use the output terminal outputs a voltage Vo.
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公开(公告)号:GR920100398A
公开(公告)日:1993-07-30
申请号:GR92100398
申请日:1992-09-23
Applicant: KOREA TELECOMMUNICATION
Inventor: IL SONG HAN
Abstract: A MOSFET analog multiplier with a variable resistive MOSFET linear means for linearly varying output current I depending upon a symmetrical input voltage from voltage sources V2 and -V2 and an input voltage from an input voltage source V1 operatively associated with the symmetrical input voltage from the voltage source V2 and -V2, with the variable resistive MOSFET linear means having a node A to output the varied output current I therethrough is disclosed. An operational amplifying unit for amplifying the linearly varied output current I and which includes an operational amplifier U with an inverting input terminal connected to the node A of the MOSFET linear means, a non-inverting input terminal connected to ground, and an output terminal. The operational amplifying unit further includes a feedback element Z connected between the inverting input terminal and the output terminal of the operational amplifier U, where in use the output terminal outputs a voltage Vo.
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