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    • 2. 发明授权
    • .DELTA..SIGMA. digital-to-analog converter with bit grouping by
significance for reducing feedback computation time
    • DELTA SIGMA数模转换器,具有比特分组的意义,可减少反馈计算时间
    • US5079551A
    • 1992-01-07
    • US550517
    • 1990-07-10
    • Shigenobu KimuraMasamitsu Yamamura
    • Shigenobu KimuraMasamitsu Yamamura
    • H03M3/02H03M7/00H03M7/32
    • H03M7/304H03M7/3028
    • A .DELTA..SIGMA. modulation type 1-bit digital-to-analog conversion circuit includes an addition circuit for adding feedback digital data to input multi-bit digital data to provide results of addition, an integration circuit for integrating the results of addition provided by the addition circuit, a quantizer for quantizing output of the integration circuit to provide 1-bit digital data, and a circuit for providing analog data corresponding to the input multi-bit digital data on the basis of the 1-bit digital data. A bit of a predetermined order and bits of orders lower than the predetermined order in the feedback data are respectively made zero and bits of orders higher than the predetermined order only in the feedback data are added by the addition circuit. By feeding back only high order bits of feedback data for addition, the feedback addition is simplified and computation time thereby is shortened.
    • DELTA SIGMA调制型1位数模转换电路包括用于将反馈数字数据添加到输入多位数字数据以提供结果的加法电路,用于对由加法提供的相加结果进行积分的积分电路 电路,用于量化积分电路的输出以提供1位数字数据的量化器,以及用于基于1位数字数据提供与输入的多位数字数据相对应的模拟数据的电路。 分别使反馈数据中的预定顺序和低于预定顺序的位的位为零,并且仅在反馈数据中比预定顺序高的位的位由加法电路相加。 通过仅反馈高阶反馈数据的加法,简化了反馈加法,缩短了计算时间。
    • 4. 发明授权
    • Howling remover having cascade connected equalizers suppressing multiple
noise peaks
    • 具有串联连接的均衡器的啸声去除器抑制多个噪声峰值
    • US5710823A
    • 1998-01-20
    • US526771
    • 1995-09-11
    • Yuichi NagataSatoshi SuzukiMorito YamadaMasao YoshidaMikio KitanoKiyoto KuroiwaShigenobu Kimura
    • Yuichi NagataSatoshi SuzukiMorito YamadaMasao YoshidaMikio KitanoKiyoto KuroiwaShigenobu Kimura
    • G10K15/00H04R3/02H04R27/00
    • H04R3/02
    • A howling prevention apparatus prevents a howling noise which is generated in a sound amplification system using a microphone and a loudspeaker. The howling prevention apparatus utilizes a plural number of first to n-th equalizers, which have a variable frequency response and which modulate an output of the microphone. A detector detects a frequency point at which a loop gain of the system reaches a peak while supplying a standard noise signal to the loudspeaker to produce a test sound and measuring the sound collected by the microphone through the series of the equalizers. A frequency response of the first equalizer is adjusted to suppress a noise peak at and around a frequency point detected by the detector. Then, a frequency response of the second equalizer is also adjusted to suppress a noise peak at and around another frequency point detected by the detector. Lastly, a frequency response of the n-th equalizer is adjusted by subsequently repeating the above setting procedure.
    • 啸叫防止装置防止在使用麦克风和扬声器的声音放大系统中产生的啸声。 啸声预防装置利用具有可变频率响应并且调制麦克风的输出的多个第一至第N均衡器。 检测器检测系统的环路增益达到峰值的频率点,同时向扬声器提供标准噪声信号以产生测试声音,并通过一系列均衡器测量由麦克风收集的声音。 调整第一均衡器的频率响应以抑制由检测器检测的频点处和周围的噪声峰值。 然后,还调整第二均衡器的频率响应,以抑制由检测器检测到的另一频率点处和周围的噪声峰值。 最后,通过随后重复上述设置过程来调整第n个均衡器的频率响应。
    • 5. 发明授权
    • Device for automatically winding a blood pressure measuring cuff
    • 用于自动卷绕血压测量袖带的装置
    • US4274424A
    • 1981-06-23
    • US46413
    • 1979-06-07
    • Shigenobu KimuraYoshiro KuboShigeru BandoAkio OseYukuo KinoshitaRyoichi HigashizonoIkuo Hanamiya
    • Shigenobu KimuraYoshiro KuboShigeru BandoAkio OseYukuo KinoshitaRyoichi HigashizonoIkuo Hanamiya
    • A61B5/022A61B5/02
    • A61B5/02233
    • A device for automatically winding a blood pressure measuring cuff around a part of the human body. The cuff comprises a flexible band having a part fixedly secured to a surrounding member adapted to receive a part of the human body. The flexible band extends circumferentially along the inner wall of the surrounding member and having one end which is pulled circumferentially so as to be wound around a part of the human body. A flexible fluid chamber is provided along the inner wall of the flexible band to be interposed between the flexible band and a part of the human body. The flexible fluid chamber operates to apply a squeezing pressure to the part of the human body when a fluid is supplied to the flexible fluid chamber. A weight is connected to one end of the flexible band and a weight hoisting device is employed for hoisting the weight. A weight holder holds the weight at a predetermined hoisting position and a pulling force is caused by the weight when the holder is released and applied to the one end of the flexible band.
    • 一种用于在身体的一部分周围自动卷绕血压测量袖带的装置。 袖带包括柔性带,其具有固定地固定到适于接收人体的一部分的周围构件的部分。 柔性带沿着周围构件的内壁沿圆周方向延伸,并且具有沿周向拉动的一端,以便缠绕在人体的一部分上。 柔性流体室沿着柔性带的内壁设置以插入在柔性带和人体的一部分之间。 当向柔性流体室供应流体时,柔性流体室操作以向人体的一部分施加挤压压力。 重物连接到柔性带的一端,并且采用重量提升装置来提升重量。 重量保持器将重量保持在预定的提升位置,并且当保持器被释放并施加到柔性带的一端时由重量引起拉力。
    • 6. 发明授权
    • Digital-to-analog conversion circuit
    • 数模转换电路
    • US5019819A
    • 1991-05-28
    • US514859
    • 1990-04-26
    • Shigenobu Kimura
    • Shigenobu Kimura
    • H03M1/08H03M3/02H03M7/02
    • H03M7/02H03M3/368H03M3/502
    • A digital-to-analog conversion circuit capable of preventing a noise produced in a digital system from mixing in an analog output has an input circuit receiving a pulse-code modulated digital signal, a conversion circuit such as a noise shaping circuit for converting the pulse-code modulated digital signal to a pulse wave signal containing analog amplitude information in a time axis direction, a buffer circuit including an electrically insulated coupling circuit such as an optical coupling circuit for transmitting output of the conversion circuit, and an analog output circuit including an analog low-pass filter for delivering out output of the buffer circuit therethrough. A noise generated in a digital system is intercepted by the buffer circuit and is not transmitted further so that mixing of the noise in the analog output circuit is prevented.
    • 能够防止在数字系统中产生的噪声在模拟输出中混合的数模转换电路具有接收脉冲编码调制数字信号的输入电路,诸如噪声整形电路的转换电路,用于将脉冲 编码调制数字信号到包含时间轴方向上的模拟幅度信息的脉波信号,缓冲电路包括电耦合电路,例如用于传输转换电路的输出的光耦合电路,以及模拟输出电路,包括: 模拟低通滤波器,用于输出缓冲电路的输出。 在数字系统中产生的噪声被缓冲电路截取,不会进一步传输,从而防止模拟输出电路中的噪声混合。
    • 7. 发明授权
    • Radio receiver having phase locked loop frequency synthesizer
    • 无线电接收机具有锁相环频率合成器
    • US4339826A
    • 1982-07-13
    • US165091
    • 1980-07-01
    • Minoru OgitaShigenobu Kimura
    • Minoru OgitaShigenobu Kimura
    • H03L7/18H03J5/00H03J5/02H03J7/28H03L7/185H04B1/26
    • H03L7/185H03J5/0281
    • A radio receiver comprises a frequency conversion circuit connected between a frequency-variable local oscillator and a divide-by-N programmable counter incorporated in a phase locked loop frequency synthesizer and adapted to continuously change the frequency to be divided by the programmable counter. Owing to the frequency conversion circuit, the local oscillator frequency is permitted to continuously change in the locked state of the phase locked loop so that the intermediate frequency offset adjustment of receivers, that is, the adjustment of the intermediate frequency of each receiver to the center frequency of an intermediate frequency filter used in the receiver can be made easily, and that a reception of such a broadcast station as having a carrier frequency which is not an integral multiple of a channel spacing frequency also can be made.
    • 无线电接收机包括连接在频率可变的本地振荡器和并入在锁相环频率合成器中的分频N可编程计数器之间的频率转换电路,并且适于连续地改变由可编程计数器划分的频率。 由于频率转换电路,允许本地振荡器频率在锁相环的锁定状态下连续变化,使得接收机的中频偏移调整,即将每个接收机的中频调整到中心 可以容易地使用在接收机中使用的中频滤波器的频率,并且可以进行具有不是信道间隔频率的整数倍的载波频率的这样的广播台的接收。
    • 8. 发明授权
    • Radio receiver operable in station search mode or station select mode
    • 无线电接收器可在台站搜索模式或台站选择模式下操作
    • US4291414A
    • 1981-09-22
    • US145349
    • 1980-04-30
    • Shigenobu Kimura
    • Shigenobu Kimura
    • H03J5/02H03J7/06H03J7/28H03J7/26
    • H03J7/06H03J5/0263H03J7/28
    • A radio receiver comprising a local oscillator, a first counter circuit for computing an algebraic sum of a number corresponding to an oscillating frequency of the local oscillator and a number corresponding to an intermediate frequency, the algebraic sum representing frequency information for a tuned input signal frequency of the receiver, a memory circuit for storing frequency information produced by the counter when the receiver is tuned to a broadcast station in a station search mode, a digital comparator for comparing the frequency information read out of the memory circuit with the frequency information of the counter in a station select mode, and a charge pump and lowpass filter responsive to the digital comparator to control a local oscillator frequency of the local oscillator so that the frequency information of the counter becomes coincident with the frequency information from the memory circuit. A second counter is provided for counting clock pulses in the station search mode. The output signal of the second counter is compared with the output signal of the first counter by the digital comparator. The station frequency information read out of the memory circuit in the station select mode may be programmed in the second counter.
    • 一种无线电接收机,包括本地振荡器,用于计算对应于本地振荡器的振荡频率的数字的代数和与对应于中频的数字的第一计数器电路,所述代数和表示调谐输入信号频率的频率信息 接收机的存储电路,用于存储电台,用于当在台站搜索模式下将接收机调谐到广播站时存储由计数器产生的频率信息;数字比较器,用于将从存储器电路读出的频率信息与频率信息 计数器在电台选择模式下,电荷泵和低通滤波器响应于数字比较器来控制本地振荡器的本地振荡器频率,使得计数器的频率信息与来自存储器电路的频率信息一致。 第二个计数器被提供用于在站搜索模式下计数时钟脉冲。 第二计数器的输出信号由数字比较器与第一计数器的输出信号进行比较。 在站选择模式下从存储器电路读出的站频率信息可以在第二计数器中被编程。