专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPH11205188A TRANSMISSION/RECEPTION SWITCHING CIRCUIT 失效
公开(公告)号：JPH11205188A
公开(公告)日：1999-07-30
申请号：JP646898
申请日：1998-01-16
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO KAZUYA , MORIWAKI TAKAO
IPC分类号： H01P1/15 , H03F1/22 , H03F3/193 , H03F3/21 , H03F3/42 , H03F3/72 , H03K17/693 , H04B1/44 , H04B1/48
摘要： PROBLEM TO BE SOLVED: To provide a transmission/reception switching circuit capable of being miniaturized compared to a conventional example. SOLUTION: This transmission/reception switching circuit for selectively switching and connecting a transmitter 101 or a receiver 102 to an antenna is provided with a transmission arm circuit connected between the transmitter 101 and the antenna 103 and provided with a first switching circuit to be turned ON at the time of transmission and turned OFF at the time of reception and a reception arm circuit connected between the receiver 102 and the antenna 103 and provided with a second switching circuit to be turned OFF at the time of the transmission and turned ON at the time of the reception. The transmission arm circuit is provided with a cascode type amplifier constituted of an FETF1 and FETF2 and an inductor Ld for impedance matching connected between the cascode type amplifier and the antenna 103. In this case, the cascode type amplifier can be replaced with a source grounded type amplifier constituted of only the FETF1 .

12. 发明专利

JPH11163640A POWER AMPLIFIER AND ITS BIAS CIRCUIT 失效
公开(公告)号：JPH11163640A
公开(公告)日：1999-06-18
申请号：JP32565597
申请日：1997-11-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO KAZUYA , MIYAZAKI YUKIO
IPC分类号： H03F1/30 , H03F3/04 , H03F3/19
摘要： PROBLEM TO BE SOLVED: To attain low voltage operation of a power amplifier by preparing a bias circuit which has an amplifier stage having a signal amplifier heterobipolar Tr whose emitter is grounded and a 1st silicon bipolar transistor Tr connected to the base electrode of the above heterobipolar Tr . SOLUTION: An RF signal inputted to an input terminal RFin is amplified by a heterobipolar Tr A and outputted via an output terminal RFout . A bias setting voltage Vref is applied to the base electrode of a 1st silicon bipolar Tr1 , and a current I2 that is amplified according to the level of the voltage Vref is outputted as an emitter current of the Tr1 . A base current is connected to a power terminal, and an emitter terminal which outputs the amplified current has a bias circuit of the Tr1 that is connected to the base electrode of the Tr A of an amplifier stage 100b. Thus, a power amplifier can operate at a low voltage level.

13. 发明专利

JPH1190719A CHAMFERING TOOL 失效
公开(公告)号：JPH1190719A
公开(公告)日：1999-04-06
申请号：JP24690897
申请日：1997-09-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAGUCHI KENJI , YAMAMOTO KAZUYA , IKEMOTO TAKAYUKI
IPC分类号： B23C3/12
摘要： PROBLEM TO BE SOLVED: To easily respond to the change in a chamfering dimension by attaching a blade to a tool main body in such a state as freely rotating and axially reciprocating and by attaching a stopper, which regulates the movement of the blade in relation to the tool main body in the inserting direction in an opening part, to the blade. SOLUTION: A push-in distance of a blade 24 in the depth direction of a filler metal 2 is regulated by bringing a ring 26 in contact with a bearing 22. The bearing 22 and the ring 26 are arranged with an abutment face of the tool main body 21 to an injection type insulating material 1 set to the standard so that a desired chamfering dimension can be obtained stably. When the chamfering dimension is changed, the blade 24 is detached from the tool main body 21 so that the thickness and the position of the ring 26 or the depth of the tool main body 21 can be changed. Namely, the stroke of the blade 24 can be changed by exchanging or deviating the ring 26 or exchanging the tool main body 21.

14. 发明专利

JPH06232925A QUADRATURE MODULATOR 失效
公开(公告)号：JPH06232925A
公开(公告)日：1994-08-19
申请号：JP1612593
申请日：1993-02-03
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO KAZUYA , MAEMURA KIMIMASA
IPC分类号： H03H11/18 , H04L27/20
摘要： PURPOSE:To obtain a modulation wave with less spurious component with no adjustment by converting a sine wave output carrier from a 0/90 deg. phase shift circuit into a square wave signal of a prescribed amplitude. CONSTITUTION:An input carrier signal from an input terminal 10c is given to a differentiation circuit 19a on one hand, in which the phase is led by 45 deg. and given to an integration circuit 19b on the other hand, in which the phase is delayed by 45 deg., resulting that the signals are separated into orthogonal carrier signals whose phase difference is 90 deg.. Then the two carriers are given to amplitude compensation circuits 60b, 60c, in which sine wave signals are converted into square wave signals and they are modulated by I, Q channel double balance mixers and synthesized at an in-phase synthesizer and the result is outputted. Since an amplitude error caused in the circuits 19a, 19b or the like is compensated by the circuits 60b, 60c, the circuit integration is facilitated. Moreover, since the complementary carrier signals having highly accurate orthogonal performance and balance are inputted to the double balanced mixer, a modulation spectrum with less spurious component is obtained.

15. 发明专利

JPH06197011A FREQUENCY DIVIDER CIRCUIT DEVICE 失效
公开(公告)号：JPH06197011A
公开(公告)日：1994-07-15
申请号：JP35967192
申请日：1992-12-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO KAZUYA , MAEMURA KIMIMASA
IPC分类号： H03K23/00 , H03L7/197
摘要： PURPOSE:To use a prescaler operated in a certain frequency range at a higher or a lower frequency by providing a frequency-voltage conversion circuit on a device and change the current of the frequency divider circuit in response to the input frequency of the frequency divider circuit. CONSTITUTION:Since the operating frequency range of a prescaler 1 almost depends on the self-running oscillating frequency, the self-running oscillating frequency is made variable in order to vary the operating frequency range of the prescaler 1. By utilizing this characteristic, a frequency-voltage conversion circuit 2 outputting a higher voltage as the frequency is high is added to the prescaler 1 as a control circuit and an input signal to the prescaler 1 is added also to the frequency-voltage conversion circuit 2 and its output is applied to a current control terminal VCS of the prescaler 1. Thus, the current of the prescaler 1 is changed in response to the input signal frequency is changed to make the input sensitivity characteristic of the prescaler 1 wide apparently.

16. 发明专利

JPH05237858A 失效
公开(公告)号：JPH05237858A
公开(公告)日：1993-09-17
申请号：JP7639592
申请日：1992-02-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO KAZUYA
IPC分类号： B29C33/04 , B29C39/26 , B29C39/38 , B29K101/10
摘要： PURPOSE:To prevent an occurence of a failure in a product in the molding of a casting resin. CONSTITUTION:A thermosetting resin 4 is cured in the following construction: a plurality of stages of hot platens 5, 6, 7 are mounted on the outer walls of a mold 1, and a temperature gradient is uniformly provided by changing vapor pressures passing through the vapor holes provided in the hot platens.

17. 发明专利

JPH02204009A CASTING MOLD ASSEMBLY 失效
公开(公告)号：JPH02204009A
公开(公告)日：1990-08-14
申请号：JP2435389
申请日：1989-02-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO KAZUYA
IPC分类号： B29C39/02 , B29C39/26
摘要： PURPOSE:To facilitate the mounting of a molded-in insert and, at the same time, prevent cracks from developing in a cast article and consequently improve its quality by a method wherein the insert is internally supported by a collar, which is arranged through O-rings onto supporting pins supported by molds. CONSTITUTION:A collar 18 is supported through O-rings 17, which are arranged in grooves 151 and 161 produced on supporting pins 15 and 16, by the supporting pins 15 and 16. O-rings 20 are arranged between bushings 13 and 14 and a molded-in insert 19. The longitudinal positioning of the insert 19 is performed by holding down the edge faces of the insert 19, which is mounted under the state that its dimension is made smaller by 0.1-0.2mm than the dimension of a cavity part 5, through the O-rings 20. In addition, the bushings 13 and 14 mounted on an upper mold 1 and a lower mold are made of metallic material, the hardness of which is higher than that of the upper mold 1 and the lower mold 2 so as to prevent the molding from deteriorating. Further, since the insert 19 is so constituted as to be supported through the collar 18 by the O-rings 17, the amount of the shifting of the insert 19 at the hardening of synthetic resin is absorbed. The screw thread of the insert 19 is prevented by the collar 18 from being broken. Furthermore, the synthetic resin is prevented by the O-rings 20 from entering the interior of the molded-in insert.

18. 发明专利

JP2014209672A 電力増幅器审中-公开
标题翻译：功率放大器
公开(公告)号：JP2014209672A
公开(公告)日：2014-11-06
申请号：JP2013085783
申请日：2013-04-16
申请人：三菱電機株式会社 , Mitsubishi Electric Corp
发明人： YAMABE SHIGEO , MIYASHITA MIYO , YAMAMOTO KAZUYA , KOBAYASHI DAISUKE , FUJIWARA SHIGERU
IPC分类号： H03F3/24 , H03F1/22 , H03F3/60
CPC分类号： H03F1/22 , H03F3/24 , H03F3/60
摘要：【課題】トランジスタの動作級などの他の特性を変化させることなく利得を調整することができる電力増幅器を得る。【解決手段】バイアス端子T1,T2にはそれぞれバイアスが供給される。トランジスタM1のゲートはバイアス端子T1に接続され、ソースは接地されている。トランジスタM2のゲートはバイアス端子T2に接続され、ソースはトランジスタM1のドレインに接続されている。可変固定容量Cv1がトランジスタM2のゲートと接地点との間に接続されている。【選択図】図1
摘要翻译：要解决的问题：提供能够调整增益而不改变诸如晶体管的操作类别的其他特性的功率放大器。解决方案：向每个偏置端子T1，T2提供偏置。晶体管M1的栅极耦合到偏置端子T1，源极接地。晶体管M2的栅极耦合到偏置端子T2，源极耦合到晶体管M1的漏极。可变固定电容Cv1耦合在晶体管M2的栅极和接地点之间。

19. 发明专利

JP2014007909A Power conversion apparatus 审中-公开
标题翻译：功率转换装置
公开(公告)号：JP2014007909A
公开(公告)日：2014-01-16
申请号：JP2012143590
申请日：2012-06-27
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KAGEYAMA MASANORI , YAMAMOTO KAZUYA , MURATA SHINJI , ITO HIROSHI
IPC分类号： H02M7/48 , H02M3/155
摘要： PROBLEM TO BE SOLVED: To provide a power conversion apparatus which can safely stop a circuit element without breakage even when an error such as over-current and over-voltage occurs in a state where internal temperature of a housing is high.SOLUTION: A control circuit 13 which controls a converter 14 and an inverter 10 has heat generation suppressing protection means 20 which adjusts current flowing in a switching element 6 of the converter 14 and suppresses heat generation of a circuit element constituting the converter 14 when determining error occurrence on the basis of detection of over-current by a current detector 15 which detects supply current from a direct-current power supply 1 or detection of over-voltage by a voltage detector 16 which detects output voltage of the converter 14. The control circuit 13 also blocks power supply from the direct-current power supply 1 by operating a DC circuit breaker 2 in accordance with determination of the error occurrence.
摘要翻译：要解决的问题：提供即使在外壳的内部温度高的状态下发生诸如过电流和过电压之类的误差的情况下，也可以不破坏地安全地停止电路元件的电力转换装置。解决方案：控制控制转换器14的电路13和逆变器10具有发热抑制保护装置20，该发热抑制保护装置20调整在转换器14的开关元件6中流动的电流，并且在基于此基础确定错误发生时确定构成转换器14的电路元件的发热通过检测来自直流电源1的供电电流的电流检测器15检测到的过电流或者检测转换器14的输出电压的电压检测器16检测过电压。控制电路13还阻断电力根据错误发生的确定，通过直流断路器2的操作从直流电源1供给。

20. 发明专利

JP2010161466A Directional coupler 有权
标题翻译：方向耦合器
公开(公告)号：JP2010161466A
公开(公告)日：2010-07-22
申请号：JP2009000874
申请日：2009-01-06
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： YAMAMOTO KAZUYA , MIYASHITA MIYO
IPC分类号： H01P5/18
CPC分类号： H01P5/18
摘要： PROBLEM TO BE SOLVED: To provide a directional coupler which is small-sized and has good directivity.
SOLUTION: The directional coupler includes; a main line having one end connected to an input port and the other end connected to an output port; a coupled line having one end in the same direction as the input port, connected to a coupled port and having the other end in the same direction as the output port, connected to an isolated port; and a phase shifter having one end connected to the isolated port and having the other end connected to the coupled port. A coupling length between the main line and the coupled line is shorter than a quarter wavelength of a use frequency of transmission power. The phase shifter shifts a phase of a second reflected wave component reaching the coupled port from the output port through the isolated port and the phase shifter, such that the phase of the second reflected wave component is opposite to that of a first reflected wave component reaching the coupled port from the output port through the coupled line.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供小尺寸并且具有良好方向性的定向耦合器。解决方案：定向耦合器包括：主线，其一端连接到输入端口，另一端连接到输出端口; 耦合线，其一端与输入端方向相同，连接到耦合端口，另一端与输出端口相同的方向连接到隔离端口; 以及移相器，其一端连接到隔离端口，另一端连接到耦合端口。主线和耦合线之间的耦合长度短于发射功率的使用频率的四分之一波长。移相器将通过隔离端口和移相器从输出端口到达耦合端口的第二反射波分量的相位移位，使得第二反射波分量的相位与达到的第一反射波分量的相位相反耦合端口从输出端口通过耦合线。版权所有（C）2010，JPO＆INPIT

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式