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71. 发明专利

JP2003204364A RECEIVER COMPATIBLE WITH MULTIPLE MODULATION SCHEMES 审中-公开
公开(公告)号：JP2003204364A
公开(公告)日：2003-07-18
申请号：JP2001401995
申请日：2001-12-28
申请人： TOSHIBA CORP
发明人： YOSHIDA HIROSHI
IPC分类号： H03G3/20 , H03G3/30 , H04L27/00 , H04L27/22 , H04L27/38
摘要： PROBLEM TO BE SOLVED: To provide a receiver compatible with a plurality of modulation schemes with sufficient receiving characteristic and reduced power consumption. SOLUTION: In a wireless communication system, the receiver compatible with a plurality of modulation schemes having different modulation multilevel numbers includes a first variable gain amplifier 101 amplifying a radio-frequency signal, a frequency converter 102 converting the amplified radio-frequency signal into a lower frequency signal and outputting the frequency-converted signal, a second variable gain amplifier 103 amplifying the frequency-converted signal, a gain controller 108 determining gain distribution between the amplifiers 101, 103 according to the modulation scheme, and controlling the gain of the amplifiers 101, 103 according to the determined gain distribution. COPYRIGHT: (C)2003,JPO

72. 发明专利

JP2003168955A VARIABLE FILTER 审中-公开
公开(公告)号：JP2003168955A
公开(公告)日：2003-06-13
申请号：JP2002292197
申请日：2002-10-04
申请人： TOSHIBA CORP
发明人： OHARA RYOICHI , ABE KAZUHIDE , KAWAKUBO TAKASHI , YOSHIDA HIROSHI , TSURUMI HIROSHI
IPC分类号： H03H9/58 , H03H9/17 , H03H9/70
摘要： PROBLEM TO BE SOLVED: To provide a newly-developed variable filter capable of varying pass characteristics by using an appropriate external control means. SOLUTION: The filter is provided with serial thin film piezoelectric resonators 11 which are connected serially to an input and an output, parallel thin film piezoelectric resonators 12 which are connected in parallel to the input and the output, and a variable voltage circuit 13 capable of varying the applying voltage of either the resonators 11 or the resonators 12. The resonant characteristic of at least either the resonators 11 or the resonators 12 is shifted by varying the voltage of the circuit 13, thereby varying the pass characteristics. COPYRIGHT: (C)2003,JPO

73. 发明专利

JP2003152587A COMPOSITE SYSTEM SHARING TERMINAL 审中-公开
公开(公告)号：JP2003152587A
公开(公告)日：2003-05-23
申请号：JP2002245800
申请日：2002-08-26
申请人： TOSHIBA CORP
发明人： TSURUMI HIROSHI , OTAKA SHOJI , SEKINE SHUICHI , YOSHIDA HIROSHI , KAYANO HIROYUKI
IPC分类号： H04B1/30 , H04B1/3822 , H04B1/40 , H04W88/06 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To provide compact and simple composite system sharing radio equipment, capable of facilitating countermeasures to a system whose modulation system, transmission speed, access system, radio frequency, and signal band is different. SOLUTION: The output of a first synthesizer 1316 is supplied to a pair of mixers 1307 for down-converting an RF signal into a base-band signal, a pair of mixers 1309 for up-converting the base-band signal into an RF signal, a mixer 1308 for down-converting the RF signal into an intermediate frequency signal, and a mixer 1310 for up-converting the intermediate frequency signal into the RF signal, so that it is possible to facilitate coping with a plurality of radio frequency, while making a synthesizer common.

74. 发明专利

JP2001189763A RADIO EQUIPMENT WHOSE MODULATION AND DEMODULATION CHARACTERISTICS CAN BE CHANGED 失效
公开(公告)号：JP2001189763A
公开(公告)日：2001-07-10
申请号：JP2000000114
申请日：2000-01-04
申请人： COMM RES LAB MPHPT , TOSHIBA CORP , FUJISE MASAYUKI , HARADA HIROSHI
发明人： YOSHIDA HIROSHI , FUJISE MASAYUKI , HARADA HIROSHI
IPC分类号： H04L27/10 , H04L27/00 , H04L27/18 , H04L29/06 , H04L29/08
摘要： PROBLEM TO BE SOLVED: To provide radio equipment which can generally correspond to plural modulation/demodulation systems and transmission rates and can change modulation/demodulation characteristics. SOLUTION: A DSP board 11 conducting a modulation processing for modulating transmission data and generating a modulation signal and a demodulation processing for demodulating a reception signal and generating original data, an FPGA board 12 conducting a filter processing on a transmission signal and the reception signal, an AD/DA conversion board 13 converting inputs to the DSP bard 11 and the FPGA board 12 into digital signals and converting outputs from the DSP board 11 and the FPGA board 12 into analog signals and a CPU board 14 controlling the boards 11, 12 and 13 through a bus 16. CPU 14 changes the modulation/demodulation systems, the transmission rates and a filter characteristic by controlling the DSP board 11 and the FPGA board 12 based on control from PC 15 connected through an interface 17.

75. 发明专利

JPH11145873A BAND-PASS FILTER AND PORTABLE RADIO MACHINE 失效
公开(公告)号：JPH11145873A
公开(公告)日：1999-05-28
申请号：JP30298197
申请日：1997-11-05
申请人： TOSHIBA CORP
发明人： TOMIOKA TAZUKO , SHIYOUKI HIROKI , YOSHIDA HIROSHI
IPC分类号： H04B1/26
摘要： PROBLEM TO BE SOLVED: To provide a stable filtering ability and to miniaturize size by combining two frequency converters in which at least one conversion frequency can be varied, and two filters whose frequency bands are fixed. SOLUTION: A band-pass filter 100 is constituted in such a way that a first frequency converter 102, a first filter 103, a second frequency converter 104 and a second filter 105 are connected in series. The first and second filters 103 and 105 are provided with prescribed frequency bands, and by varying at least one conversion frequency in the first and second frequency converters 102 and 104, the filter whose pass-band width can be varied as a whole is constituted. A signal passes through the filter while it is properly up-converted or down-converted in execution. Then, the frequencies of the first and second filters change with the passage, accompanying this.

76. 发明专利

JPH10107712A DIVERSITY RADIO EQUIPMENT 失效
公开(公告)号：JPH10107712A
公开(公告)日：1998-04-24
申请号：JP25855996
申请日：1996-09-30
申请人： TOSHIBA CORP
发明人： SEKINE SHUICHI , KAYANO HIROYUKI , YOSHIDA HIROSHI , OTAKA SHOJI , MAEDA TADAHIKO
IPC分类号： H04B7/02
摘要： PROBLEM TO BE SOLVED: To improve the polarization efficiency by employing an equipment provided with a portable radio equipment antenna consisting of a rectangular conductor ground plate, a radio unit, a monopole antenna, a conductor linear element, a variable reactance element and a control unit for the diversity radio equipment. SOLUTION: An inverted-F antenna 12 is used for this radio equipment and placed at one side of an end of a short-side A of a conductor ground plate 11. A linear element 13 is formed to be the same shape as that of the inverted-F antenna 12. The antenna 12 is fed from a radio circuit unit 14 on the conductor ground plate 11 via a high frequency line 21. Furthermore, the linear element 13 is connected to a variable reactance element 15 inserted to a connecting point of the conductor ground plate 11. The element 15 is connected to a control circuit unit 16 via a control signal line 22 and a control signal is fed to the element 15 via an element that has a high impedance for high frequencies and a low impedance for low frequencies such as an inductor 17.

77. 发明专利

JPH1093647A RECEIVER HAVING DIRECT CURRENT OFFSET ELIMINATING FUNCTION AND COMMUNICATION SYSTEM USING IT 失效
公开(公告)号：JPH1093647A
公开(公告)日：1998-04-10
申请号：JP16627297
申请日：1997-06-23
申请人： TOSHIBA CORP
发明人： TSURUMI HIROSHI , YOSHIDA HIROSHI , ITAKURA TETSURO , YAMAJI TAKAFUMI , YASUDA AKIRA , UENO TAKASHI , TANIMOTO HIROSHI , FUJIMOTO RYUICHI , HORIGUCHI HIROSHI
IPC分类号： H04L27/22 , H04L27/38
摘要： PROBLEM TO BE SOLVED: To accurately eliminate direct current offset by a digital signal processing part detecting direct current offset that occurs in an analog signal processing circuit and by a correcting means of the analog signal processing circuit correcting the direct current offset based on a held value. SOLUTION: An analog signal processing circuit 10 converts in frequency a high frequency signal into a base band and outputs dual signal that mutually has π/2 phase difference, and an A/D converter 3 performs A/D conversion of the output and outputs it. A digital signal processing circuit 40 detects the output, a demodulating means 50 demodulates it into original data, a DC offset (DO) detecting means 41 and 42 detect DO, and a DO holding means 43 and 44 hold DO. Each offset correcting means 20, 21, 24, 25, 28 and 29 correct DO that is held based on value that is undergone D/A conversion by a D/A converter 5. Thereby, DO that occurs in the circuit 10 is reduced and receiving error rate can be decreased.

78. 发明专利

JPH09105703A LIQUID CRYSTAL ELEMENT EVALUATING METHOD AND EVALUATING DEVICE 失效
公开(公告)号：JPH09105703A
公开(公告)日：1997-04-22
申请号：JP26421695
申请日：1995-10-12
申请人： TOSHIBA CORP
发明人： URANO TAEKO , MACHIDA SHIGERU , SANO KENJI , YOSHIDA HIROSHI
IPC分类号： G01N21/88 , G01M11/00 , G01N21/17 , G01N21/59 , G02F1/13
摘要： PROBLEM TO BE SOLVED: To easily carry out detection, identification, and quantitative determination of an electric field responsive impurity in a liquid crystal element with high sensitivity by analyzing slope of an electric field response curve when pulse electric fields, which are different from each other in polarity, are impressed to the liquid crystal element. SOLUTION: A pulse signal generated in a pulse generator 1 is impressed to a liquid crystal cell 10. On the other hand, infrared light from an infrared light source 2 is dispersed in an infrared spectroscope 3, and an infrared light of a specific wavelength area is taken out so as to irradiate the cell 10 via a polarizer 4, and then, the infrared light transmitted through the cell 10 is detected by means of a MCT detector 5 so as to be transduced into an electric signal. This electric signal is amplified by means of a preamplifier 6 and a main amplifier 7 so as to be inputted to a digital sampling oscilloscope 8, and then, integration is carried out after time resolution. The whole of an estimating device is controlled by means of a computer 9. Light in excessive wavelength areas other than a measured objective wavelength area can be cut out by means of the spectroscope 3. Therefore, temperature increase in the cell 10 can be suppressed, and a condition adequate for measurement of an electric field response curve can be maintained.

79. 发明专利

JPH0677780A SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE 失效
公开(公告)号：JPH0677780A
公开(公告)日：1994-03-18
申请号：JP23048692
申请日：1992-08-28
申请人： TOSHIBA CORP , TOSHIBA MICRO ELECTRONICS
发明人： KURODA TADASHI , YOSHIDA HIROSHI , UDAGAWA OSAMU
IPC分类号： G06F15/02 , H03K3/02
摘要： PURPOSE:To reduce the power consumption by setting a frequency of a basic clock lower than an operation maximum frequency of a CPU when a drive power supply voltage is a prescribed voltage or below so as to decrease a minimum voltage for the CPU. CONSTITUTION:When a power supply voltage reaches a prescribed voltage or below, an output S6 of a voltage detection circuit 8 goes to an H level. Thus, a signal S5 resulting from an output S3 of an OR circuit 4 subject to frequency division by two stages at binary counters 61, 62 is outputted from an OR circuit 9d as a signal S7 that is the same as the signal S5 to a basic clock generating circuit 10, from which basic clocks phi1, phi2 are generated. A CPU 16 is operative even when the power supply voltage is lower than a prescribed voltage by setting the frequency of the output clocks phi1, phi2 to be lower than a maximum frequency of the CPU 16. That is, the minimum operating voltage of the CPU 16 is set lower. This is attained through the adjustment of number of stages of the counters 61, 62. Thus, the power consumption is reduced.

80. 发明专利

JPH02232917A SEMICONDUCTOR EXPOSING DEVICE AND EXPOSING METHOD 失效
公开(公告)号：JPH02232917A
公开(公告)日：1990-09-14
申请号：JP5288689
申请日：1989-03-07
申请人： TOSHIBA CORP
发明人： YOSHIDA HIROSHI
IPC分类号： H01L21/30 , G03F7/20 , H01L21/027
摘要： PURPOSE:To eliminate the standing wave effect in a resist, and to make it possible to form a highly precise microscopic pattern using a circularly polarized coherent light which passes through a 1/4 wave-length board. CONSTITUTION:The phase of the single color coherent laser beam L1, to be emitted from an excimer laser device 3, is rotated at an angle of 90 degrees by a lambda/4 wavelength plate 4, the laser beam advances 90 degrees, it is turned into a circular polarized light L2, it comes into a mask 7 passing through a reflecting mirror 5 and an eye-glass 6, then the laser beam is made incident on a wafer 11 after passing through a trapezoid mirror 8, a concave mirror 9 and a convex mirror 10, the resist 1 on a semiconductor substrate 2 is exposed, and a pattern determined by a mask 7 is developed. The phase of the circularly polarized light projected on the resist 1 is changed by the reflection of the substrate 2, but as it is reflected as a circularly polarized light, it shows no standing wave effect in the resist 1. When a homogenous light is made to irradiate, the maximum value and the minimum value are revealed in odd multiplication and even multiplication of 1/4 wavelength, but if it is a circularly polarized light, one of them becomes the polarized beam which is shifted by a 1/4 wavelength from the other light, and as a result, one of them shows a maximum value, the other one shows a minimum value, and a fixed value, having the valanced intensity of the minimum and the maximum values can be obtained at all times.

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