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1. 发明专利

JPH03268745A RECEIVING CIRCUIT OF MAGNETIC RESONANCE DEVICE 失效
公开(公告)号：JPH03268745A
公开(公告)日：1991-11-29
申请号：JP34024490
申请日：1990-11-30
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU
IPC分类号： A61B5/055 , G01R33/36 , H04B1/16
摘要： PURPOSE:To lower the Q value of a resonance circuit containing a receiving antenna without sacrificing an S/N by providing a capacitive current distributing means for allowing a part of a feedback current to escape from a resonance circuit means through a tap point, and allowing the remainder to go to the resonance circuit means. CONSTITUTION:A resistance feedback system 20 containing a feedback resistance Rf extending from an output end of an amplifier 18 to a resonance circuit 10 is provided so that a first feedback current is carried, and on a current distributor 30, a tap point P1 is provided, and the feedback system 20 is connected to the point concerned P1. By this current distributor 30, a part of a first feedback current is diverted from the resonance circuit 10 as to its direction, passes through a capacitor 34 and flows to the ground, and also, the other part of a first feedback current passes through a capacitor 32 and goes to the resonance circuit 10. As a result, a value of an effective damping resistance becomes a numerical value being higher by (nf) folds than a damping resistance value of a conventional type circuit, and as for a value of the feedback resistance Rf, a smaller one than that of a conventional type is enough, the Q value can be lowered, and also, the S/N is not sacrificed.

2. 发明专利

JPH02262728A COMMUNICATION SYSTEM FOR DATA TRANSMISSION BETWEEN TRANSMISSION AND RECEPTION PLATFORMS 失效
公开(公告)号：JPH02262728A
公开(公告)日：1990-10-25
申请号：JP3210490
申请日：1990-02-13
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU
IPC分类号： H04B7/00 , G08C17/00 , H01Q1/22 , H01Q1/38
摘要： PURPOSE:To reduce prescribed time required for the once completion of a usual CT scan procedure by moving a reception antenna arranged at a reception platform along a transmission antenna arranged at a transmission platform and provided with a circular stripline. CONSTITUTION:Data transmission is performed between the transmission platform 20 and the reception platform which perform relative movement mutually. The transmission antenna 10 is arranged at the transmission platform 20, and also, is provided with the circular stripline 21. The reception antenna 50 is the short segment of the stripline transmission line of the transmission antenna 10 and the strip line transmission line whose width and interval are same as that of the circular stripline transmission line. And the reception antenna 50 is slid along the transmission antenna 10, and furthermore, a signal from the strip line 21 is inputted to the reception antenna 50, and further, the signal is inputted to a receiver 51. In such a way, the service life of the transmission antenna can be extended, and the prescribed time required for the once completion of the usual CT scan procedure can be reduced.

3. 发明专利

JPS63158903A MODULATOR 失效
公开(公告)号：JPS63158903A
公开(公告)日：1988-07-01
申请号：JP31994387
申请日：1987-12-17
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU
IPC分类号： H03C1/54
摘要： PURPOSE:To lower non-linearity between the input and the output of a modulator, by connecting a feedback circuit to both ends of a current detecting resistor being connected in parallel with a differential mutual conductance amplifier in a balancing type modulator, and changing the current of an output amplifier corresponding to a voltage detected by the resistor. CONSTITUTION:A carrier input signal is inputted to a base variable mutual conductance gilbert type modulator 10, and an obtained modulation output is amplified by the output amplifier 52, then is outputted from an output port 71. In such a way, the modulator 10 is constituted with a variable mutual conductance amplifier 16, the differential mutual conductance amplifier 14, and fixed power sources 15, 15, however, at this time, the current detecting resistor R is connected to the two conductors of a common port 18 in the amplifier 14, and the voltages generated at both ends of the resistor are inputted to the feedback circuit 51 outside the modulator 10. Hereafter, the modulation output from the circuit is fed back to the circuit 14, and the output of the circuit 14 is outputted as the output from which linearity is reduced from the output amplifier 52 via the amplifier 16.

4. 发明专利

JPH06317640A S/N RATIO OPTIMIZING TUNING SYSTEM 失效
公开(公告)号：JPH06317640A
公开(公告)日：1994-11-15
申请号：JP133194
申请日：1994-01-11
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU , RICHIYAADO JIEI FUAANRITSUCHI
IPC分类号： A61B5/055 , G01R33/32 , G01R33/36 , G01R33/56 , H03J3/20 , G01R33/28
摘要： PURPOSE:To provide an S/N ratio optimizing tuning system which can be used in any system comprising a resonance antenna, an amplifier and a single adjustable tuning element, by which the need of separating the amplifier at the time of normally using a receiving antenna can be eliminated. CONSTITUTION:A S/N ratio optimizing tuning system comprises a switch control noise source 20 weakly connected to a receiving antenna 30, and the switch control noise source 20 is switched from/to the high power state to/from the low power state by means of a designated frequency. A noise power meter 40 is synchronized with the switch control noise source 20, and the output of the receiving antenna 30 is measured. When the noise source 20 is switched to the high power state to the low power state, the noise power meter 40 measures the output of the receiving antenna 30, and the ratio of the output of the receiving antenna 30 when the noise source is in the high power state to the output of the receiving antenna 30 when it is in the low power state is calculated to obtain the noise power ratio. A tuning circuit 70 is adjusted to maximize the noise power ratio.

5. 发明专利

JPH06105824A APPARATUS AND METHOD FOR PROCESSING MAGNETIC RESONANCE SIGNAL 失效
公开(公告)号：JPH06105824A
公开(公告)日：1994-04-19
申请号：JP3651793
申请日：1993-02-25
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU , JIERII SHII POSURASUZUNII
IPC分类号： A61B5/055 , F02B75/02 , G01R33/32 , H03C1/54 , H03C1/58 , H03D7/14 , G01R33/28
摘要： PURPOSE:To provide a processor for a magnetic resonance signal which enables the picking up of a magnetic resonance signal with limited noise from a multicoil detector while allowing the realization of high resolutions. CONSTITUTION:This processor is provided with an input mixer means which performs a frequency shifting of magnetic resonance signals to a second frequency band from a first frequency band, a bandpass filter means controllable to perform a bandpass filter processing of outputs from the input mixer means and an output mixer means which performs a frequency shifting of magnetic resonance signals from the controllable bandpass filter means to the first frequency band from the second frequency band. Also included are an adder 142 which couples signals from the output mixer means to generate an output signal of a low noise, an up/down mixer controller 144 which controls the frequency shifting of the input mixer means and the output mixer means and a phase/band width controller 146 to control the band width and the phase characteristic of the controllable bandpass filter means.

6. 发明专利

JPH09308625A OPTICAL TRANSMISSION SYSTEM 失效
公开(公告)号：JPH09308625A
公开(公告)日：1997-12-02
申请号：JP12877396
申请日：1996-05-23
申请人： TOSHIBA CORP
发明人： SUZUKI TATSURO , TEIMOSHII AARU FUOTSUKUSU , TOMU HAATOFUOODO
IPC分类号： A61B6/03 , H04B10/032 , H04B10/077 , H04B10/079 , H04B10/11 , H04B10/114 , H04B10/10 , H04B10/105 , H04B10/22
摘要： PROBLEM TO BE SOLVED: To provide an optical transmission system with which signals can be transmitted at high speed between a rotating body and a fixed body while keeping the restoration accuracy of signals. SOLUTION: Concerning this optical transmission system, the signals are transmitted between a rotating body 1 and a fixed body 2, which are contactlessly arranged, through a transmission system 3 for sending optical signals and a reception system 4 for receiving optical signals. The rotating body 1 is provided with the transmission system 3 and the fixed body 2 is provided with the reception system 4. The transmission system 3 is equipped with a laser light discharging part (light emitting part) 6 for generating a laser beam LB. The laser beam discharging part 6 is arranged at a certain position so as to discharge the optical signals at an angle turned toward a virtual point P1 determined on the central axis of the rotating body 1. The reception system 4 is equipped with a plane mirror 9 for reflecting the laser beam LB and a light receiving element 10 for receiving the laser beam LB reflected on this plane mirror 9. The plane mirror 9 is arranged at the position capable of reflecting the optical signals from the laser beam discharging part 6, and the light receiving element 10 is arranged at the convergent point of the laser beam LB determined by the mutual geometrical optical position relation between the arranging position of the plane mirror 9 and the virtual point P1.

7. 发明专利

JPH06216649A BALANCED MODULATOR 失效
公开(公告)号：JPH06216649A
公开(公告)日：1994-08-05
申请号：JP23814193
申请日：1993-09-24
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU , JIERII SHII POZURUZUNI
IPC分类号： A61B5/055 , F02B75/02 , G01R33/32 , H03C1/54 , H03C1/58 , H03D7/14
摘要： PURPOSE:To provide a balanced modulator which is capable of reducing the leakage of a carrier wave. CONSTITUTION:This balanced modulator is provided with a carrier more part 10, a signal wave port 12, a modulator U1 generating a wave to be modulated in a wave to be modulated port 14 and a carrier wave leakage suppressing means. The carrier wave leakage suppressing means is provided with balanced transformers BT 1, BT 2 reducing the leakage of parasitic carrier wave between the carrier 10 and the wave to be modulated port 14 by reducing the average voltage of the ports 10 and 14, an offset means reducing the leakage of the carrier wave generated by offset voltage in the signal wave port 12 and reducing the leakage of the common-mode carrier wave between the carrier wave port 10 and the wave to be modulated port 14 by impressing the offset voltage on a signal wave and a reactance network 24 reducing the leakage of 1/4 cycle behind parasitic carrier wave which is generated between the carrier wave port 10 and the wave to be modulated port 14.

8. 发明专利

JPH02262727A COMMUNICATION SYSTEM FOR DATA TRANSMISSION BETWEEN TRANSMISSION AND RECEPTION PLATFORMS 失效
公开(公告)号：JPH02262727A
公开(公告)日：1990-10-25
申请号：JP3210590
申请日：1990-02-13
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU , JIERII SHII POSURUTSUNII
IPC分类号： H01Q13/20 , H04B5/00
摘要： PURPOSE:To reduce a prescribed time required for the completion of a usual CT scan procedure by moving a reception antenna arranged at a reception platform along a transmission antenna consisting of a coaxial cable arranged at a transmission platform as keeping a specific distance. CONSTITUTION:The reception antenna 60 is slid along the transmission antenna 10, and signals from the coaxial cables 21 and 22 are inputted to the reception antenna 60, and furthermore, the signals are inputted to a receiver 70. Furthermore, amplitude is amplified up to a voltage level possible to demodulate the signals in the receiver 70 by an amplitude detector. Therefore, electrical connection can be performed successively, and also, the wear of interface structure and a mechanical device can be reduced. Furthermore, since relative rotation between the transmission and reception platforms can be performed successively, the service life of the transmission antenna can be extended, and the prescribed time required for the completion of the usual CT scan procedure can be reduced.

9. 发明专利

JPS63139535A ORTHOGONAL ANTENNA APPARATUS OF MAGNETIC RESONANCE IMAGING SYSTEM 失效
公开(公告)号：JPS63139535A
公开(公告)日：1988-06-11
申请号：JP29627387
申请日：1987-11-26
申请人： TOSHIBA CORP
发明人： TEIMOSHII AARU FUOTSUKUSU
IPC分类号： G01R33/32 , A61B5/055 , A61B10/00 , G01R33/341 , G01R33/36

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