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1. 发明专利

JP2008244837A Receiver 审中-公开
标题翻译：接收器
公开(公告)号：JP2008244837A
公开(公告)日：2008-10-09
申请号：JP2007082427
申请日：2007-03-27
申请人： Toshiba Corp , 株式会社東芝
发明人： IZUMI TAKASUKE
IPC分类号： H04B1/16 , H04N5/44
摘要： PROBLEM TO BE SOLVED: To provide a receiver which can be improved in performance to an electric field even without making a user perform a selecting operation of field intensity. SOLUTION: The receiver is providing with: an attenuator in which an RF signal is input to output an attenuation signal; an amplification means in which the attenuation signal output from the attenuator is input to output an amplification signal of the attenuation signal; and a tuner in which the amplification signal is input to output an AGC control signal, wherein the attenuator copes with the maximum input level of the RF signal using the AGC signal. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供即使不使用户执行场强的选择操作，也可以在电场上提高性能的接收机。解决方案：接收机提供：衰减器，其中输入RF信号以输出衰减信号; 放大装置，其中从衰减器输出的衰减信号被输入以输出衰减信号的放大信号; 以及其中输入放大信号以输出AGC控制信号的调谐器，其中衰减器使用AGC信号处理RF信号的最大输入电平。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2009038492A Broadcast receiving apparatus, and broadcast receiving method 审中-公开
标题翻译：广播接收设备和广播接收方法
公开(公告)号：JP2009038492A
公开(公告)日：2009-02-19
申请号：JP2007199456
申请日：2007-07-31
申请人： Toshiba Corp , 株式会社東芝
发明人： IZUMI TAKASUKE
IPC分类号： H04N5/46 , H04B1/10 , H04B1/16 , H04N5/52 , H04N5/60 , H04N7/173 , H04N21/426
CPC分类号： H04N5/4446 , H04N5/46 , H04N5/52 , H04N21/42638 , H04N21/4382
摘要： PROBLEM TO BE SOLVED: To provide a broadcast receiving apparatus and broadcast receiving method capable of receiving digital broadcasting and analog broadcasting satisfactorily with one configuration.
SOLUTION: The broadcast receiving apparatus includes a channel selection section (17) for receiving broadcast signals containing analog broadcasting and digital broadcasting, selecting one of the broadcast signals and outputting the selected broadcast signal; an amplification section (25) for amplifying the selected broadcast signal in accordance with a control signal (IF_AGC); first demodulation sections (33 and 34) for demodulating the amplified broadcast signal; a control section (33-2) for controlling amplification processing of the amplification section so as to be controlled when the selection section selects the analog broadcasting; filter sections (26 and 27) for making an analog sound signal and an analog video signal in the selected broadcast signal from the selection section pass through; a second demodulation section (28) for demodulating a selected broadcast signal passing through the filter sections; and a video and sound processing section (35) for performing video and sound signal processing of the demodulation signal from the first demodulation section when the selection section selects the digital broadcasting and of the demodulation signal from the second demodulation section in the case of selecting the analog broadcasting.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供能够以一种配置令人满意地接收数字广播和模拟广播的广播接收装置和广播接收方法。广播接收装置包括用于接收包含模拟广播和数字广播的广播信号的频道选择部分（17），选择一个广播信号并输出所选择的广播信号; 放大部分，用于根据控制信号（IF_AGC）放大所选择的广播信号; 用于解调放大的广播信号的第一解调部分（33和34）用于控制放大部分的放大处理以便当选择部分选择模拟广播时被控制的控制部分（33-2）; 用于使来自选择部分的所选广播信号中的模拟声音信号和模拟视频信号的滤波器部分（26和27）通过; 用于解调通过所述滤波器部分的所选择的广播信号的第二解调部分（28）以及视频和声音处理部分，用于当选择部分选择数字广播时从第一解调部分执行解调信号的视频和声音信号处理，并且在选择第二解调部分的情况下执行来自第二解调部分的解调信号模拟广播。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JPH07326931A DEMODULATION CIRCUIT 失效
公开(公告)号：JPH07326931A
公开(公告)日：1995-12-12
申请号：JP11888494
申请日：1994-05-31
申请人： TOSHIBA CORP
发明人： IZUMI TAKASUKE
IPC分类号： H03G3/30 , H03D7/00 , H03G11/00
摘要： PURPOSE:To form a demodulation circuit for easily improving reception limit performance at the time of low C/N reception at a low cost. CONSTITUTION:First IF signals frequency-converted in a down converter are supplied to an amplifier circuit 3 provided with a control terminal C1. The IF signals are supplied to the separation means 10 of a next stage, second IF signals are obtained from the first IF signals and simultaneously, I signals and Q signals are separated. The I signals and the Q signals are respectively supplied through amplitude limiting circuits 40a and 40b to A/D conversion circuits 20a and 20b. By the diodes 41a, 42a, 41b and 42b of the amplitude limiting circuits 40a and 40b, the amplitude of the signals is limited by the forward voltage of the diode. The limit value of the amplitude is set larger than the input voltage range of the A/D conversion circuits 20a and 20b so as not to influence a normal operation, the input voltage of instantaneous fluctuation is limited and an average control voltage is supplied from the signal processing circuit 30 of the next stage to the control terminal C1 of the amplifier circuit 3.

4. 发明专利

JP2002290253A CATV RECEIVER 审中-公开
公开(公告)号：JP2002290253A
公开(公告)日：2002-10-04
申请号：JP2002017295
申请日：2002-01-25
申请人： TOSHIBA CORP
发明人： IZUMI TAKASUKE , SHINGU YASUSHI , KUDO TAKEYA
IPC分类号： H04B1/26 , H04N5/44 , H04N7/10 , H04N7/16
摘要： PROBLEM TO BE SOLVED: To improve a phase noise at a low frequency offset, an LO(Local Oscillator) leakage and a return loss or the like so as to attain high performance at a low cost. SOLUTION: The basic configuration of a CATV tuner 101 adopts a single conversion system including one local oscillator and one mixer or the like to reduce the phase noise. In this case, an attached circuit consisting of an AGC circuit 70, an amplifier 80 and an LPF 90 to control the gain of an input signal frequency is inserted between an HPF/LPF 41 and a switch 42 at pre- stages of variable tracking filters (43, 49, 55). Since the isolation of the input of each mixer can be enhanced, the production of LO leakage and the return loss or the like can be suppressed to attain high performance at a low cost. Furthermore, a variable frequency divider 67 conducts frequency division without using a fixed frequency divider prescaler of a PLL circuit so as to reduce the phase noise at a low frequency offset of a local oscillating frequency.

5. 发明专利

JPH08289212A DIGITAL/ANALOG SHARING TUNER 失效
公开(公告)号：JPH08289212A
公开(公告)日：1996-11-01
申请号：JP8980195
申请日：1995-04-14
申请人： TOSHIBA CORP
发明人： KUDO TAKEYA , ADACHI TOSHIMASA , IZUMI TAKASUKE , ONO YUJI
IPC分类号： H04B1/26 , H04N5/44 , H04N7/16
摘要： PURPOSE: To provide a digital/analog sharing tuner with which signals can be respectively stably received when receiving digital and analog modulated signals. CONSTITUTION: This tuner is provided with an input terminal 26 to which an analog modulated television signal and a digital modulated television signal are supplied in common, frequency converting means 27 and 29 for converting the television signals supplied to this input terminal 26 to intermediate frequency (IF) signals, a first surface acoustic wave (SAW) filter 30 to which the IF signals outputted from these frequency converting means 27 and 29 are inputted, a mixer circuit 34 for analog demodulation to which the output of this SAW filter 30 is inputted through a second SAW filter 44, and a mixer circuit 36 for digital demodulation to which the output of the first SAW filter 30 is inputted.

6. 发明专利

JPH07288483A DIGITAL TRANSMISSION/RECEPTION CIRCUIT 失效
公开(公告)号：JPH07288483A
公开(公告)日：1995-10-31
申请号：JP7756594
申请日：1994-04-15
申请人： TOSHIBA CORP
发明人： ONO YUJI , ADACHI TOSHIMASA , IZUMI TAKASUKE , OTO HIDEKI
IPC分类号： H03G3/00 , H03D7/00 , H03H11/12 , H03L7/093 , H04B1/16 , H04B1/26
摘要： PURPOSE:To reduce the noises which are caused when the external vibrations are applied to a loop filter. CONSTITUTION:The non-lamination type capcitors C31, C32, C33 and C34 which have the capacirty larger than 1000pF are applied to a loop filter 30 of a variable local oscillator 1. These capacitors have no voltage effect nor noises so much despite the application of external vibrations. Thus the noises which are caused by the external vibrations applied to the filter 30 can be reduced.

7. 发明专利

JPH09116341A TUNER AND UNIT FOR CATV RECEIVING DEVICE 失效
公开(公告)号：JPH09116341A
公开(公告)日：1997-05-02
申请号：JP27541595
申请日：1995-10-24
申请人： TOSHIBA CORP
发明人： ADACHI TOSHIMASA , IZUMI TAKASUKE , KUDO TAKEYA
IPC分类号： H03D7/18
摘要： PROBLEM TO BE SOLVED: To improve the output signal wave level of an entire tuner by means of a single BPF by providing a 2nd frequency conversion part which converts the TV signal that undergone the frequency selection via the BPF into a lower frequency band and also eliminates the image frequency. SOLUTION: A 1st frequency converter 26 calculates a TV signal S22 and a local oscillation signal S23, and an outputted 1st intermediate frequency S24 undergoes the selection of its frequency via a BPF 29 which has a frequency band equivalent to 1 to 2 channels of the signal S22 and is supplied to a phaser 31 as a 1st intermediate frequency signal S25. The local oscillation signal S30 outputted from a local oscillator 35 is supplied to a phaser 34. The phasers 31 and 34 divide the signals S25 and S30 into two pieces respectively, and the phase of one of both divided signals is shifted by π/2 and undergoes the arithmetic processing. The output S31 and S32 of mixers 32 and 33 are synthesized by a synthesizer 37, and the image frequency component is eliminated.

8. 发明专利

JPH08289221A DIGITAL AND ANALOG SHARING TUNER 失效
公开(公告)号：JPH08289221A
公开(公告)日：1996-11-01
申请号：JP8819695
申请日：1995-04-13
申请人： TOSHIBA CORP
发明人： ADACHI TOSHIMASA , IZUMI TAKASUKE , KUDO TAKEYA
IPC分类号： H04N5/46 , H04N7/16 , H04N21/426
摘要： PURPOSE: To make this tuner economically profitable with simple configuration and further to easily suppress the interference of signals to be exerted upon a circuit by guiding an analog modulated television signal through a first output terminal to an analog demodulating means and guiding a digital modulated television signal through a second output terminal to a digital demodulating means. CONSTITUTION: At a CATV tuner 11, the digital modulated television signal and the analog modulated television signal are inputted to an input terminal 12 in common and this tuner is respectively provided with an output terminal 29 for outputting the analog modulated television signal and an output terminal 39 for outputting the digital modulated television signal. Then, an analog demodulation circuit 31 for demodulating the analog modulated television signal and a digital demodulation circuit 43 for demodulating the digital modulated television signal are respectively connected to the respective output terminals 29 and 39. Thus, the CATV tuner 11 can be shared for digital processing and analog processing.

9. 发明专利

JPH11317664A HIGH FREQUENCY OSCILLATOR 失效
公开(公告)号：JPH11317664A
公开(公告)日：1999-11-16
申请号：JP12504098
申请日：1998-05-07
申请人： TOSHIBA CORP
发明人： KUDO TAKEYA , IZUMI TAKASUKE
IPC分类号： H03L7/183 , H04N5/44
摘要： PROBLEM TO BE SOLVED: To suppress the change in the natural frequency of a control loop which is caused by the difference of oscillation frequencies in a small way, even in the case in which the oscillation frequency of a voltage controlled oscillator is changed, and to reduce phase noise over the entire frequency range that is needed. SOLUTION: For this high frequency oscillator which contains a voltage controlled oscillator 21, a variable frequency divider 22, a reference oscillator 24, a reference frequency divider 25A, a phase comparator 23, a charge pump 26A and a low-pass filter 27, a control means 30 which sets the frequency division ratio R of the divider 25A to different values or sets the current value of the pump 26A to values different between when a prescribed upper side frequency range is set in an oscillation frequency range where the oscillator 21 can output and when a frequency range that is lower than it is set at the time of setting the frequency division ratio N of the divider 22 based on a channel selection operation is provided. Thus, it is possible to suppress the change in the natural frequency of a PLL control loop in a small way.

10. 发明专利

JPH11284537A TUNER 失效
公开(公告)号：JPH11284537A
公开(公告)日：1999-10-15
申请号：JP8420998
申请日：1998-03-30
申请人： TOSHIBA CORP
发明人： IZUMI TAKASUKE
IPC分类号： H04J11/00 , H04B1/26 , H04N5/44 , H04N5/50
摘要： PROBLEM TO BE SOLVED: To improve phase noise over the entire band and to reduce fixed deterioration of a system, especially when receiving a digital broadcasting signal. SOLUTION: This tuner divides an inputted high frequency signal into plural (three) passbands at a band changeover switch 113 to enable output, provides each passband with a variable filtering means and a frequency converting means, and outputs an IF signal that undergoes frequency conversion, into a prescribed intermediate frequency(IF). The respective circuit form of three local oscillators 118, 123 and 128 which constitute plural frequency converting means (117 and 118), (122 and 123) and (127 and 128) provided in each passband are an unbalanced oscillator circuit in a UHF band, an unbalanced or balanced oscillator circuit in a VHF high band, and a balanced oscillator circuit in a VHF low band. As result, it is possible to secure an oscillation range in the VHF band and to improve phase noise in the UHF band.

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