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1. 发明专利

JPH1146116A OSCILLATOR AND OSCILLATION SYSTEM USING THE SAME 失效
公开(公告)号：JPH1146116A
公开(公告)日：1999-02-16
申请号：JP20011097
申请日：1997-07-25
申请人： MURATA MANUFACTURING CO
发明人： OE OSAMU , HATA TOSHIO , TSURU TERUHISA
IPC分类号： H03B5/18
摘要： PROBLEM TO BE SOLVED: To provide the small-sized oscillator easily oscillating a signal and the oscillating system using the oscillator. SOLUTION: Relating to the oscillator 10, an oscillation transistor(TR) 11 is placed on a dielectric substrate and a 1/4 wavelength open end stub 12 connects to its base. Furthermore, a collector of the TR 11 connects to ground via a capacitor 13. Moreover, en emitter of the TR 11 connects its collector (base) via a feedback capacitor C1(C2). Since the 1/4 wavelength open end stub 12 is regarded as ground in terms of distributed constants, the oscillator 10 acts like a common base circuit.

2. 发明专利

JPH01253994A FORMING METHOD FOR VIA-HOLE OF CERAMIC MULTILAYER BOARD 失效
公开(公告)号：JPH01253994A
公开(公告)日：1989-10-11
申请号：JP8183888
申请日：1988-04-01
申请人： MURATA MANUFACTURING CO
发明人： MORIMOTO RYOICHI , OTA HIROYUKI , KODO GIICHI , HATA TOSHIO
IPC分类号： H05K3/46
摘要： PURPOSE:To prevent a recess from generating at the connection part of a via- hole and to stabilize an electric connection of the via-hole by forming a through hole passing through integrally a base sheet adhering to a green sheet, filling conductive paste in the hole, drying it and peeling the sheet. CONSTITUTION:A sheet material 2 to become a base sheet adheres to one side face of a green sheet 1, a through hole 3 integrally passing through the sheet 1 and the material 2 is formed, conductive paste 4 is filled in the hole 3, dried, cured, and the material 2 is peeled to be removed from the sheet 1. Then, the paste 4 filled in the hole 3 at the side of the material 2 remains in a state (d) of the drawing on the sheet 1. In this case, the paste 4 is lightly press-molded from its outer end face. Thus, a viahole having no recess is formed, and a stable electric connection can be obtained.

3. 发明专利

JPH01192190A THROUGH-HOLE FORMING METHOD FOR CERAMIC GREEN SHEET 失效
公开(公告)号：JPH01192190A
公开(公告)日：1989-08-02
申请号：JP1841488
申请日：1988-01-27
申请人： MURATA MANUFACTURING CO
发明人： HATA TOSHIO , MORIMOTO RYOICHI , OTA HIROYUKI , KODO GIICHI
IPC分类号： H05K3/46 , H05K1/02 , H05K1/03 , H05K3/00 , H05K3/40
摘要： PURPOSE:To obtain a through-hole with a required diameter high in accuracy by a method wherein the through-hole whose diameter is larger than a required one is bored in a ceramic green sheet, and the paste of the same component as that of the ceramic green sheet is applied onto the wall face of the through- hole. CONSTITUTION:A required number of through-hole 2h, whose diameters are larger than required ones, are bored in a ceramic green sheet 2. A paste 4 of the same component as that of the green sheet is applied to the wall face of the through-holes 2h through, for instance, a through-hole printing or the like, whereby through-holes 2h' provided with a required diameter phi2 can be obtained. By these processes, even if a through-hole with a small diameter is needed to provide, the through-hole can be obtained free from a mechanical restriction imposed on the use of a boring tool such as an NC drill, a punch, or the like. And, the bored through-hole is free from an effect of the extension of the ceramic green sheet 2, so that a through-hole with a required diameter phi2 high in accuracy can be obtained.

4. 发明专利

JPH01187907A AIR-CORE COIL 失效
公开(公告)号：JPH01187907A
公开(公告)日：1989-07-27
申请号：JP1322788
申请日：1988-01-22
申请人： MURATA MANUFACTURING CO
发明人： HATA TOSHIO , MORIMOTO RYOICHI , OTA HIROYUKI , KODO GIICHI
IPC分类号： H01F17/02 , H01F17/00
摘要： PURPOSE:To easily form spiral electrodes and to obtain a stable L value by forming a plurality of stripelike metal electrodes inclined on a sheetlike base made of ceramics before baking, cylindrically rolling the base, superposing and adhering both ends of the base, and baking it. CONSTITUTION:A plurality of stripelike metal electrodes 3 at a predetermined pitch inclined at a predetermined angle are formed on a sheetlike base 1 made of ceramics before baking, the base 1 is cylindrically rounded, both ends of the substrate 1 are superposed and adhered, both the ends of the electrodes 3 are electrically connected spirally, and then baked. For example, after through holes 2 are formed at a predetermined pitch on the ceramic base 1 before baking, the electrodes 3 are formed by means, such as printing or the like, and metal paste or the like for forming the electrodes 3 is filled in the holes 2. Then, the base 1 is cylindrically rounded, and so superposed that the side with the holes 2 is disposed to be at the ends of the electrodes 3 of the other side. Thereafter, it is contained in a baking furnace to simultaneously bake the base 1 and the spiral electrodes 3.

5. 发明专利

JPH01165194A SUBSTRATE WITH BUILD-IN COIL 失效
公开(公告)号：JPH01165194A
公开(公告)日：1989-06-29
申请号：JP32487187
申请日：1987-12-21
申请人： MURATA MANUFACTURING CO
发明人： KODO GIICHI , HATA TOSHIO , OTA HIROYUKI , MORIMOTO RYOICHI
IPC分类号： H05K1/02 , H05K1/16
摘要： PURPOSE:To decrease the area required for forming a coil to obtain inductance, by equipping a through hole having a spiral groove in an insulating substrate, and to enable the adjustment of the inductance, by installing a core made of a magnetic material in the through hole. CONSTITUTION:A spiral groove 16 is formed on the inner surface of a through hole 14 equipped in a substance 12 made of ceramic, etc. A conductor path 18 of such conductive material as silver is formed in said groove 16. Electrodes 20a and 20b are formed around the through hole 14 on the principal surface of the substrate 12. The conductor path 18 forms a coil as an inductance element between the electrodes. Forming a core made of a magnetic material in the through hole 14 increases the inductance. The inductance can be adjusted by selecting from a plurality of cores of different permeabilities prepared previously or by forming a male screw at one side of the core to adjust the length of the portion inserted into the through hole 14.

6. 发明专利

JPS61294917A BUFFERED DELAY LINE 失效
公开(公告)号：JPS61294917A
公开(公告)日：1986-12-25
申请号：JP13652885
申请日：1985-06-21
申请人： MURATA MANUFACTURING CO
发明人： HATA TOSHIO , YONEZAWA MASAO
IPC分类号： H03H7/32
摘要： PURPOSE:To reduce the input resistance of an LC delay line by selecting a capacitance of a capacitor and an inductance of a coil so as to cause a specific relation. CONSTITUTION:No input resistance is inserted between an input inverter 5 and an LC delay line 4 in the buffered delay line. In order to eliminate the need for an input resistor between the input inverter 5 and the LC delay line, the capacitance C of the capacitor 2 and the inductance L of the coil 3 constituting each constant K-type low pass filter 1 are selected so as to form respectively C=td/r and L=td.r, where (r) is an output resistance of the input inverter 5 and td is the required inter-tap delay time td. Thus, the circuit is matched without inserting any input resistor between the input inverter 5 and the LC delay line 4.

7. 发明专利

JP2001313526A OSCILLATOR AND COMMUNICATION UNIT 失效
公开(公告)号：JP2001313526A
公开(公告)日：2001-11-09
申请号：JP2000128346
申请日：2000-04-27
申请人： MURATA MANUFACTURING CO
发明人： FUJIDAI MASANORI , SATO FUMITOSHI , HATA TOSHIO
IPC分类号： H03B5/02 , H03B1/04 , H03B5/12 , H03B5/18
摘要： PROBLEM TO BE SOLVED: To provide an oscillator that suppresses deterioration in a phase noise characteristic due to production of a spurious wave component such as harmonics and to provide a communications unit using the oscillator. SOLUTION: The oscillator is provided with an oscillator circuit 2 connected to a resonance circuit 1, an amplifier circuit 4 that amplifies an output signal from the oscillator circuit 2 and an additional circuit 3 that is placed between an output section of the oscillator circuit 2 and an input section of the amplifier circuit 4, consists of an isolator and a frequency filter or the like and blocks transmission of a spurious wave such as harmonics with respect to the fundamental wave.

8. 发明专利

JP2001127543A FREQUENCY CHANGEOVER TYPE OSCILLATOR AND ELECTRONIC DEVICE USING THE SAME 失效
公开(公告)号：JP2001127543A
公开(公告)日：2001-05-11
申请号：JP30892899
申请日：1999-10-29
申请人： MURATA MANUFACTURING CO
发明人： FUJIDAI MASANORI , HATA TOSHIO
IPC分类号： H03B5/02 , H03B5/08 , H03B5/12 , H03B5/18
摘要： PROBLEM TO BE SOLVED: To provide a frequency changeover type oscillator that can easily satisfy an oscillating condition even when a switching width of oscillated frequencies is large and whose number of components is not increased. SOLUTION: The impedance of a resonance system section is designed to satisfy the oscillating conditions for two oscillating frequencies or more, a changeover means is provided only to an amplifier system section and changing the impedance of the amplifier system section switches the oscillated frequency. Since no switching means is provided to the resonance system section, it results in no loss occurrence by the switching means in the resonance system section, no output level is decreased and no C/N characteristics are deteriorated. Since no switching means is provided to the resonance system, the number of components can be reduced, and miniaturization and a low cost can be attained.

9. 发明专利

JPH08251045A PLL CIRCUIT MODULE 失效
公开(公告)号：JPH08251045A
公开(公告)日：1996-09-27
申请号：JP5535595
申请日：1995-03-15
申请人： MURATA MANUFACTURING CO
发明人： SAKAI MASARU , UNO MASAO , HATA TOSHIO
IPC分类号： H03L7/18 , H04B1/04 , H04B1/10 , H04B1/50
摘要： PURPOSE: To suppress mutual interference between oscillation systems of a PLL circuit for transmission and a PLL circuit for reception and to reduce interfering to the oscillation system when a signal is amplified. CONSTITUTION: The PLL circuit 10 for transmission which outputs an oscillation signal Ha of frequency 1/n (n>=2) time as high as the sent signal Sa, a multiplying circuit 1 which multiplies the oscillation signal Ha by (n), and the PLL circuit 20 for reception which outputs a signal Src for reception processing are constituted on the same substrate. The sent signal Sa outputted from the multiplying circuit 1 is amplified by an external power amplifier PA and fed to an antenna. Consequently, the mutual interference between the oscillation systems can be suppressed, which is suitable to size reduction. Deterioration in phase noise characteristics due to interference and fluctuations can be prevented. Specially, this module is useful as a PLL circuit module used for a portable telephone set and a mobile object communication equipment.

10. 发明专利

JPH08167844A VOLTAGE CONTROLLED OSCILLATOR, IC FOR PLL AND PLL CIRCUIT 失效
公开(公告)号：JPH08167844A
公开(公告)日：1996-06-25
申请号：JP31067494
申请日：1994-12-14
申请人： MURATA MANUFACTURING CO
发明人： FURUKUBO MASASHI , TAMAKOSHI OSAMU , HATA TOSHIO
IPC分类号： H03L7/099
摘要： PURPOSE: To obtain a voltage controlled oscillator(VCO) capable of reducing its size and cost, a PLL IC to be suitably used for the VCO and a PLL circuit. CONSTITUTION: The collector side of an oscillation stage transistor(TR) Q1 is connected to the emitter side of a buffer stage TR Q2 and both the TRs Q1, Q2 are cascade-connected through a coil L. The base and collector of the TR Q2 are mutually connected through a bias resistor R1' and the base is grounded through a serial circuit consisting of bias resistors R2', R3'. A node between the resistors R2', R3' is connected to the base of the TR Q1. Consequently stable oscillation characteristics can be obtained by comparatively simple constitution without losing a small shape.

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