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1. 发明专利

JPH04301909A SIGNAL DISTRIBUTOR 失效
公开(公告)号：JPH04301909A
公开(公告)日：1992-10-26
申请号：JP6596791
申请日：1991-03-29
申请人： HITACHI LTD , HITACHI FERRITE LTD , HITACHI VIDEO & INF SYST
发明人： SUZUKI KAZUTOSHI , HIKITA MITSUTAKA , ISHIDA YOSHIKATSU , AKAGI TAKATOSHI , TANAKA SATOSHI
IPC分类号： H03H7/48 , H01P5/16 , H03H7/21
摘要： PURPOSE:To constitute and miniaturize the signal distributor without using any microstrip lines. CONSTITUTION:The twisted lines of insulated cover lines 6 and 6A connected to an input terminal 1 are divided, the lines 6 and 6A are wound around a troidal core 5 more than once from mutually reverse directions, insulated cover line end parts 6-1 and 6A-1 are connected to the input terminal 1, an insulated cover line end part 6-2 is connected to an output terminal 4, and an end part 6A-2 is connected to an output terminal 3. Three insulated cover lines 7, 7A and 7B are twisted and wound around the troidal core more than once, insulated cover line end parts 7-1, 7A-1, 7B-1, 7-2, 7A-2 and 7B-2 are twisted once outside the troidal core, the 7-1 is connected to the output terminal 3, the 7B-1 is connected to an input terminal 2, the 7A-1 is connected to the output terminal 4, and the 7A-2, 7-2 and 7B-2 are connected to a ground conductor. On the other hand, when a signal is inputted to one input terminal, the signals of the mutually same phase component are outputted to the output terminals and when a signal is inputted to the other input terminal, the signals of mutually reverse phase components are outputted to the output terminals.

2. 发明专利

JPH04253414A BRANCH FILTER USING SURFACE ACOUSTIC WAVE RESONATOR COMPOSITE FILTER 失效
公开(公告)号：JPH04253414A
公开(公告)日：1992-09-09
申请号：JP961591
申请日：1991-01-30
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA , SHIBAGAKI NOBUHIKO , AKAGI TAKATOSHI , SUZUKI KAZUTOSHI
IPC分类号： H03H9/25 , H03H9/64
摘要： PURPOSE:To reduce energy consumption by deciding the arrangement and connecting method of one-opening surface acoustic wave resonators so that an impedance characteristic on the side or a common terminal can have reactivi ty. CONSTITUTION:With a single antenna 1 as the common terminal, a filter 2 for reception and a filter 3 for transmission are parallelly connected. In this case, the four one-opening surface acoustic wave resonators composed of electrodes 4-1-4-6 or the like and gap capacitors composed of electrode patterns 5-1 and 5-2 are provided and formed on a piezoelectric substrate 7, which can propagate surface acoustic waves, so as to be used as the filter 3 for transmission. Further, acoustic absorbing materials 6-1-6-6 for absorbing the surface acoustic waves and inductances 8-1-8-4 for matching an outside circuit are provided. Moreover, each one-opening surface acoustic wave resonator is composed of an equivalent inductance 11-1, equivalent capacitor 12-1 and electrostatic capacitor 13-1.

3. 发明专利

JPH06236815A HIGH-FREQUENCY CIRCUIT DEVICE AND RADIO APPARATUS 失效
公开(公告)号：JPH06236815A
公开(公告)日：1994-08-23
申请号：JP22685993
申请日：1993-09-13
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： SHIBAGAKI NOBUHIKO , HIKITA MITSUTAKA , TABUCHI TOYOJI , AKAGI TAKATOSHI , WAKAMORI SATOSHI , MATSUMOTO TOMOZO
IPC分类号： H01F27/00 , H03H9/145 , H03H9/25 , H04B1/08 , H04B1/38 , H04B1/3822 , H05K1/18 , H01F15/00
摘要： PURPOSE:To provide a high-frequency circuit device wherein it is effective to make an apparatus utilizing the high-frequency circuit device such as a radio apparatus or the like small-sized and its high-frequency characteristic is good. CONSTITUTION:In a high-frequency circuit device which is provided with a package 7 having an airtight space used to house a high-frequency circuit element 8, the high-frequency circuit element 8 is fixed and bonded, via a conductor pattern, to the surface of a board 1 constituting the package 7 and a winding inductance 11 is installed in a hole made in the rear of the board 1.

4. 发明专利

JPH05251987A 失效
公开(公告)号：JPH05251987A
公开(公告)日：1993-09-28
申请号：JP4669192
申请日：1992-03-04
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA , SHIBAGAKI NOBUHIKO , AKAGI TAKATOSHI , WAKAMORI SATOSHI
IPC分类号： H03H7/38 , H03H9/64
摘要： PURPOSE:To provide a communication use high performance filter having a low loss and a broad band characteristic by solving a problem of impedance mis-matching of the surface acoustic wave resonator composite filter comprising plural surface acoustic wave resonators. CONSTITUTION:An impedance matching circuit 8 including inductive elements 10-1-10-4 is inserted to an electric connecting point in the inside of the surface acoustic wave resonator composite filter. Number of the inserted matching circuits 8 or their location is optionally selected. The selection is optimized by taking the relation of the filter configuration or its characteristic and specification into account. A can type or surface mount type package or the like with a connection terminal to the matching circuit 8 thereto is used for the mount of the surface acoustic wave resonator composite filter having the internal matching circuit 8. Since the matching state in the inside of the filter is improved as a result, the communication use high performance filter having a low loss and a broad band characteristic is realized.

5. 发明专利

JPH0522074A SURFACE ACOUSTIC WAVE RESONATOR, SURFACE ACOUSTIC WAVE RESONATOR COMPOSITE FILTER AND RADIO TRANSMITTER/ RECEIVER 失效
公开(公告)号：JPH0522074A
公开(公告)日：1993-01-29
申请号：JP17123691
申请日：1991-07-11
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA , SHIBAGAKI NOBUHIKO , AKAGI TAKATOSHI
IPC分类号： H03H9/145 , H03H9/64 , H04B1/40
摘要： PURPOSE:To obtain the surface acoustic wave resonator which can arbitrarily turn a resonance characteristic to a narrow band by electrically parallelly connecting a gap capacitor formed with a thin film electrode on a piezoelectric substrate to the surface acoustic wave resonator. CONSTITUTION:The gap capacitor composed of plane electrodes 19-1 and 19-2 formed on the same piezoelectric substrata as the surface acoustic wave resonator composed of many pairs of interlaced electrodes are electrically parallelly connected by electric wirings 20-1 and 20-2. In this case, the thin film electrode formed on the piezoelectric substrate similarly to the gap capacitor or the wire of Al or the like is used for the electric wirings 20-1 and 20-2. Namely, by electrically parallelly connecting the gap capacitor to the surface acoustic wave resonator, the parallel capacity of the resonator is increased. Therefore, a capacity ratio applied by a ratio between this capacity and the equalizing capacity of the resonator is enlarged, and the resonance characteristic of the narrow band can be realized.

6. 发明专利

GB2319936A CDMA communication RF signalling processing apparatus using SAW 未知
公开(公告)号：GB2319936A
公开(公告)日：1998-06-03
申请号：GB9725300
申请日：1997-11-28
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA , TAKUBO CHISAKI , SHIBAGAKI NOBUHIKO , SAKIYAMA KAZUYUKI
IPC分类号： H03H9/145 , G06G7/195 , H03H9/42 , H03H9/72 , H04B1/707 , H04B1/7093 , H04J13/00 , H04L27/227
摘要： A surface acoustic wave signal processing apparatus for processing first and second high-frequency signals having frequencies f 1 and f 2 respectively, which comprises: first and second surface acoustic wave delay elements for receiving the first and second high-frequency signals respectively and independently of each other, the delay elements being formed as surface acoustic wave excitation (15, 18) and reception (16-1, 16-2, 19-1, 19-2) transducers on a piezoelectric substrate 1 so that a phase delay * small Greek phi * 1 with respect to the frequency f 1 is substantially equal to a phase delay * small Greek phi *2 with respect to the frequency f 2 (that is, * small Greek phi *1 * small Greek phi *2 ); and a mixer for mixing first and second high-frequency output signals of the first and second surface acoustic wave delay elements so that a signal having a frequency f 1 - f 2 which is a difference between the two frequencies f 1 and f 2 is taken out as an output signal of the mixer. Application is to Direct Sequence Spread Spectrum signals f 1 with BPSK, QPSK, MSK, etc., modulation. Signals f 2 are non-modulated. Temperature compensation is achieved. Delay detection and carrier recovery are described.

7. 发明专利

DE4313981C2 未知
公开(公告)号：DE4313981C2
公开(公告)日：1996-10-02
申请号：DE4313981
申请日：1993-04-28
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA , TABUCHI TOYOJI , OKAZAKI KATSUNORI
IPC分类号： H03H9/02 , H03H9/145 , H03H9/64 , H03H9/25

8. 发明专利

DE4113968A1 Mask structure for semiconductor component prodn. - has transparent support plate on which are periodically set given groups of component structures with phase shift structures 未知
公开(公告)号：DE4113968A1
公开(公告)日：1991-10-31
申请号：DE4113968
申请日：1991-04-29
申请人： HITACHI LTD
发明人： IMURA RYO , HOSHINA YOSHINORI , ASAI KENGO , HIKITA MITSUTAKA , ISOBE ATSUSHI , SUZUKI RYO , ODA KOHJI , SAKIYAMA KAZUYUKI
IPC分类号： G03F1/00 , G03F1/30 , G03F1/68 , G03F7/20 , H01L21/027 , H01L21/30 , H03H3/08
摘要： A number of groups of component structures ise formed on the transparent support plate in order to realise a lithographic mask structure with transparent and opaque regions. At least part of an opaque region has a size defined by adjacent transparent regions. The groups are periodically arranged, and at least one group has a phase shift structure. The component structure of the groups contains a transparent partial structure can be combined with other partial structures such that a multiple transition of an illumination beam can be combined through the mask structure. Pref. the phase shift structure has a function to provide a phase shift of 180 deg. for the illumination beam. USE/ADVANTAGE - For mfr. of semiconductor components with improved mask formation and function.

9. 发明专利

DE4113968C2 未知
公开(公告)号：DE4113968C2
公开(公告)日：1999-11-18
申请号：DE4113968
申请日：1991-04-29
申请人： HITACHI LTD
发明人： IMURA RYO , HOSHINA YOSHINORI , ASAI KENGO , HIKITA MITSUTAKA , ISOBE ATSUSHI , SUZUKI RYO , ODA KOHJI , SAKIYAMA KAZUYUKI
IPC分类号： G03F1/00 , G03F1/30 , G03F1/68 , G03F7/20 , H01L21/027 , H01L21/30 , H03H3/08 , G03F7/00 , G03F9/00

10. 发明专利

DE3751858T2 未知
公开(公告)号：DE3751858T2
公开(公告)日：1996-12-05
申请号：DE3751858
申请日：1987-11-24
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： HIKITA MITSUTAKA , SAIGO YOICHI , KUROSAWA KAZUHITO
IPC分类号： H03H9/145 , H03H3/08 , H03H9/02 , H03H9/64
摘要： This invention relates to the structure of a band-pass or band-rejection filter by combining a plurality of one-port surface acoustic wave resonators (421 to 433 or Q1 to Q4) whose interdigital electrode fingers are disposed on a piezoelectric substrate (10). The filter combining surface acoustic wave resonators of the present invention consists of a series circuit of the one-port surface acoustic wave resonators (421 to 433 or 70 to 72) disposed on a piezoelectric substrate (10) for transmitting elastic surface wave and a plurality of circuit elements containing capacitance elements (431 to 433 or 70 to 72), and one-port surface acoustic wave resonators (421 to 433 or 70 to 72) disposed between the electrodes of the plurality of circuit elements and the common ground. This structure can accomplish a filter having a low loss, high power handling capability and high design freedom of rejection-and passing-band.

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