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1. 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.

2. 发明专利

JP2002261542A OSCILLATOR AND COMMUNICATION DEVICE USING THE SAME 审中-公开
公开(公告)号：JP2002261542A
公开(公告)日：2002-09-13
申请号：JP2001300624
申请日：2001-09-28
申请人： MURATA MANUFACTURING CO
发明人： SAKAI MASARU
IPC分类号： H03B5/08 , H03B5/02 , H03B5/12 , H03B5/36 , H03F1/02
摘要： PROBLEM TO BE SOLVED: To provide an oscillator, by which current consumption of the device carrying it can be suppressed, when it is not operating and to provide a communication device using it. SOLUTION: A voltage controlled oscillator 10 is provided with an oscillation circuit 11 which oscillates in several frequency bands, an amplification circuit 12 which amplifies the oscillation signals from the oscillation circuit 11, a control terminal 13 which applies a control voltage to the oscillation circuit 11, a power supply terminal 14 of the oscillation circuit 11, a power supply terminal 15 of the amplification circuit 12, and an output terminal 16 which outputs the output signals. The resistance varying means 17 of the amplification circuit 12 is connected between the emitter and the ground of a transistor Tr for amplification and has a resistor R1 and a series circuit, composed of a resistor R2 and a switch SW connected in parallel.

3. 发明专利

JPH10284935A VOLTAGE-CONTROLLED OSCILLATOR AND ITS PRODUCTION 失效
公开(公告)号：JPH10284935A
公开(公告)日：1998-10-23
申请号：JP9080497
申请日：1997-04-09
申请人： MURATA MANUFACTURING CO
发明人： SAKAI MASARU
IPC分类号： H05K9/00 , H01L23/12 , H01L23/498 , H01L23/50 , H03B1/00 , H03B5/02 , H05K1/02 , H05K3/40
摘要： PROBLEM TO BE SOLVED: To secure distance between input/output terminals and to prevent the deterioration of a phase noise(C/N) characteristic by permitting terminals formed in recessed parts which are arranged in the corner parts of a substrate to be an input terminal or an output terminal. SOLUTION: A varicap diode VD, transistors Tr1 and Tr2, a capacitor C and bypass capacitors BC1 and BC2, etc., are provided on the main surface 2a of the substrate. The recessed parts 4a, 4b, 4c and 4d are formed in the corner parts of the substrate 2, a conductor is applied on respective inner peripheral surfaces and a power voltage terminal Bv, a voltage control input terminal VC, a modulation terminal M and the output terminal P are formed. The recessed parts 5a, 5b, 5c and 5d with an opening being wider than that of the recessed parts 4a-4c are formed in the almost center part of the side surfaces 2c, 2d, 2e and 2f on the substrate 2, the conductor is applied on the respective inner peripheral surfaces and grounded terminals G1, G2, G3 and G4 are formed. Thus, the dimension of the length of a substrate diagonal line is secured between the input terminal VC and the output terminal P.

4. 发明专利

JP2006351976A CIRCUIT MODULE AND CIRCUIT DEVICE 审中-公开
公开(公告)号：JP2006351976A
公开(公告)日：2006-12-28
申请号：JP2005178683
申请日：2005-06-20
申请人： MURATA MANUFACTURING CO
发明人： SAKAI MASARU
IPC分类号： H05K7/20 , H01L23/12 , H01L23/36 , H05K1/02 , H05K1/18
摘要： PROBLEM TO BE SOLVED: To provide a circuit module capable of improving heat radiation effects, without using heat sinks and without increasing the electrode area. SOLUTION: The circuit module A is provided with a component 1, accompanied by heat generation during an operation, and a module substrate 2 for mounting the heat-generating component 1 on a surface. A surface electrode 3 thermally connected with the heat-generating component 1 is provided on the surface of the module substrate 2, a back surface electrode 5 facing the surface electrode is provided on the back surface, and a through-hole 6 is provided for heat radiation which connects the surface electrode 3 and the back-surface electrode 5. By integrally forming many recesses and projections 7 for increasing the surface area on the back surface electrode 5, heat radiating area is increased and heat radiation effect is enhanced. COPYRIGHT: (C)2007,JPO&INPIT

5. 发明专利

JP2000059166A RESONANCE CIRCUIT AND OSCILLATION CIRCUIT USING THE SAME 失效
公开(公告)号：JP2000059166A
公开(公告)日：2000-02-25
申请号：JP22044898
申请日：1998-08-04
申请人： MURATA MANUFACTURING CO
发明人： SAKAI MASARU
IPC分类号： H03H5/12 , H03B5/12 , H03H11/46 , H03J5/24
摘要： PROBLEM TO BE SOLVED: To provide the resonance circuit of a frequency changeover type capable of making a resonance frequency hardly affected by the fluctuation of a voltage applied to a frequency changeover terminal and external noise and preventing the destruction of a C-MOS element connected to the frequency changeover terminal. SOLUTION: This resonance circuit 10 is constituted by a resonator 2, a capacitor C2 whose one end is connected to the resonator 2, a diode D1 whose anode is connected to the other end of the capacitor C2 and whose cathode is grounded, a first resistor R2 connected to the anode of the diode D1 and a second resistor R3 connected parallelly to the diode D1. Thus, in the non- conductive state of the diode, the resonance frequency is hardly affected by the fluctuation of the voltage applied to the frequency changeover terminal and the external noise, and the voltage to be applied to the frequency changeover terminal is freely set.

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