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51. 发明授权

US4126204A Speaker system 失效
标题翻译：扬声器系统
公开(公告)号：US4126204A
公开(公告)日：1978-11-21
申请号：US764220
申请日：1977-01-31
申请人： Kenji Ogi , Masakatsu Sakamoto
发明人： Kenji Ogi , Masakatsu Sakamoto
IPC分类号： H04R1/28 , H05K5/00
CPC分类号： H04R1/2826
摘要： In a bass-reflex type speaker system, in which sound signal waves radiating from the back of a speaker within a cabinet are emitted out through a hollow duct while the phase of the sound signal wave is reversed, the improvement comprising at least one dividing plate secured within the hollow duct and disposed parallel to the longitudinal direction of the duct or a hollow pipe with a diameter smaller than that of the duct, the hollow pipe being coaxially disposed within the hollow duct where the pipe may be made of sound absorbing material.
摘要翻译：在低音反射型扬声器系统中，其中在声信号波相位相反的情况下，通过空心管道从外壳内的扬声器背面辐射的声音信号波被发射出来，改进包括至少一个分隔板固定在中空管道内并且平行于管道的纵向方向设置或直径小于管道直径的中空管，中空管同轴地设置在中空管道内，其中管道可以由吸声材料制成。

52. 发明授权

US4103290A Digital frequency display device 失效
公开(公告)号：US4103290A
公开(公告)日：1978-07-25
申请号：US767830
申请日：1977-02-11
申请人： Tadao Sekiguchi
发明人： Tadao Sekiguchi
IPC分类号： G01R13/02 , G01R23/00 , G09G3/04 , H03K21/18 , G06F3/14 , G08B5/36 , G08B23/00
CPC分类号： G09G3/04 , G01R13/02 , G01R23/00 , H03K21/18
摘要： A digital frequency display device includes a counter for counting a frequency to be displayed, a latch circuit for temporarily storing a plurality of digit signals from the counter and for outputting the digit signals in response to the latch pulses, a decoder for decoding the digit signals from the latch circuit into another coding system, a display section for visually displaying the digit signals decoded from the decoder, a gate for preventing the latch pulses from reaching the latch circuit at undesired times and a digit eraser for erasing any one of the digits of the numerals representing the frequency displayed when the latch pulses feeding to the latch circuit is blocked by the gate means.

53. 发明授权

US4091241A Stereo indicating circuit for an FM receiver 失效
标题翻译：用于FM接收机的立体声指示电路
公开(公告)号：US4091241A
公开(公告)日：1978-05-23
申请号：US750857
申请日：1976-12-15
申请人： Kaku Sakaida
发明人： Kaku Sakaida
IPC分类号： H04B1/16 , H04H5/00
CPC分类号： H04B1/1653
摘要： A stereo indicating circuit for use with an FM receiver having a multiplex demodulator, a stereo indicator and a stereo-monaural mode selector, the stereo indicating circuit comprising a smoothing circuit having a short time constant for changing the mode of the FM receiver from stereo to monaural and immediately turning off the stereo indicator after the power switch of the FM receiver is turned off by utilizing the sharp voltage drop of said smoothing circuit.
摘要翻译：一种用于具有多路解调器，立体声指示器和立体声单声道模式选择器的FM接收机的立体声指示电路，立体声指示电路包括具有短时间常数的平滑电路，用于将FM接收机的模式从立体声改变为通过利用所述平滑电路的急剧的电压降，关闭FM接收机的电源开关后立即关闭立体声指示器。

54. 发明授权

US4079333A Audio amplifier 失效
标题翻译：音频放大器
公开(公告)号：US4079333A
公开(公告)日：1978-03-14
申请号：US758758
申请日：1977-01-12
申请人： Yoichiro Yamada
发明人： Yoichiro Yamada
IPC分类号： H03F3/181 , H03F3/68 , H04S1/00
CPC分类号： H03F3/68
摘要： An audio amplifier which processes mainly dynamic signals and which is provided with a plurality of amplifying systems each having a preamplifier and a main amplifier. A plurality of power sources are used to separately supply electric power to the respective amplifying systems, resulting in elimination of transient crosstalk.
摘要翻译：一种主要处理动态信号的音频放大器，其具有多个具有前置放大器和主放大器的放大系统。使用多个电源来分别向相应的放大系统供电，从而消除了瞬时串扰。

55. 发明授权

US4873684A Method and apparatus for multiplexing of input signals having differing frequencies and demultiplexing same 失效
标题翻译：用于复用具有不同频率和解复用的输入信号的方法和装置
公开(公告)号：US4873684A
公开(公告)日：1989-10-10
申请号：US246923
申请日：1988-09-19
申请人： Hirokazu Kobayashi , Yukihiko Miyamoto , Masaoki Takai , Syuichi Fujisawa , Hiroshi Miyazawa
发明人： Hirokazu Kobayashi , Yukihiko Miyamoto , Masaoki Takai , Syuichi Fujisawa , Hiroshi Miyazawa
IPC分类号： H04J3/06 , H04J3/07 , H04J3/16
CPC分类号： H04J3/1647 , H04J3/0626 , H04J3/07
摘要： A time division multiplex transmission system for time division multiplexing a plurality of information signals having different sampling frequencies and transmitting the time division multiplexed signal by one transmission path. The system includes the steps of: rearranging the plurality of information signals so as to have a format of the time division multiplexed signal by use of a reference sample signal which has a frequency obtained by multiplexing the maximum frequency or a frequency higher than the maximum frequency among the sampling frequencies of the plurality of information signals by the number of the plurality of information signals; and interposting a dummy signal into the portion where there is no available information signal.
摘要翻译：一种时分复用传输系统，用于对具有不同采样频率的多个信息信号进行时分复用，并通过一个传输路径传输时分复用信号。该系统包括以下步骤：通过使用参考采样信号来重排多个信息信号以具有时分复用信号的格式，该参考采样信号具有通过多路复用最大频率或高于最大频率的频率获得的频率在所述多个信息信号的采样频率中，所述多个信息信号的数量; 并将虚拟信号内插到没有可用信息信号的部分中。

56. 发明授权

US4850030A Radio communication system for communicating between two stations upon automatic switching to an idle communication channel 失效
标题翻译：用于在自动切换到空闲通信信道时在两个站之间通信的无线电通信系统
公开(公告)号：US4850030A
公开(公告)日：1989-07-18
申请号：US113355
申请日：1987-10-28
申请人： Hiroyuki Hashimoto , Nobuo Iizuka , Akira Suzuki
发明人： Hiroyuki Hashimoto , Nobuo Iizuka , Akira Suzuki
IPC分类号： H04B1/40 , H04W4/10 , H04W72/04
CPC分类号： H04W36/06 , H04W4/10 , H04W76/005
摘要： In the radio communication system for performing a communication in the idle channel selected from a plurality of frequency channels, the originating call station transmits the station identification code to specify the distant station together with the idle channel data to be actually communicated, and the distant station designated by the station identification code shifts to the designated idle channel, and the communication is executed between two stations. During communication in a certain channel between two stations, in the case where a radio interference occurs in this channel and it is intended to shift to other channel, one station transmits the other channel data in the communication channel and the other station receives it, and the communication is continued each other in the other channel.
摘要翻译：在从多个频道中选择的空闲频道中进行通信的无线通信系统中，始发呼叫站发送台站识别码，与要实际通信的空闲信道数据一起指定远端站，远端站由站识别代码指定移动到指定的空闲信道，并且在两个站之间执行通信。在两个站之间的某个信道通信期间，在该信道发生无线电干扰并且要转移到其他信道的情况下，一个站在通信信道中发送其他信道数据，另一个站接收它，以及通信在另一个通道中相互继续。

57. 发明授权

US4845436A Frequency synthesizer suited for use in a time division multiplexing system 失效
标题翻译：频率合成器适用于时分复用系统
公开(公告)号：US4845436A
公开(公告)日：1989-07-04
申请号：US178598
申请日：1988-04-07
申请人： Hirokazu Kobayashi , Yukihiko Miyamoto , Masaoki Takai , Syuichi Fujisawa , Hiroshi Miyazawa
发明人： Hirokazu Kobayashi , Yukihiko Miyamoto , Masaoki Takai , Syuichi Fujisawa , Hiroshi Miyazawa
IPC分类号： H04J3/06
CPC分类号： H04J3/0629
摘要： A frequency synthesizer includes a 1/N divider for generating an address clock signal the frequency of which is 1/N times the frequency of an input signal, a memory for storing samples in a unit sine and cosine wave which is read out in response to the address clock signal to produce a frequency deviation signal, and a quadrant modulator responsive to both of the input signal and frequency deviation signal for producing an output signal the frequency of which is the difference between the input signal and frequency deviation signal. The frequency of the frequency deviation signal is varied by digitally changing N to modify the frequency of the output signal while maintaining the continuousness of the output signal phase.
摘要翻译：频率合成器包括用于产生频率为输入信号频率的1 / N倍的地址时钟信号的1 / N分频器，用于以单位正弦存储采样的存储器和响应于产生频偏信号的地址时钟信号，以及响应于输入信号和频偏信号两者的象限调制器，用于产生其输入信号和频率偏差信号之间的差值的输出信号。通过数字变化N来改变频率偏差信号的频率，以修改输出信号的频率，同时保持输出信号相位的连续性。

58. 发明授权

US4825436A Time division multiplexing system for N channels in a frame unit base 失效
标题翻译：时分多路复用系统，以帧单位为基础的N个通道
公开(公告)号：US4825436A
公开(公告)日：1989-04-25
申请号：US237694
申请日：1988-08-25
申请人： Hirokazu Kobayashi , Yukihiko Miyamoto , Masaoki Takai , Syuichi Fujisawa , Hiroshi Miyazawa
发明人： Hirokazu Kobayashi , Yukihiko Miyamoto , Masaoki Takai , Syuichi Fujisawa , Hiroshi Miyazawa
IPC分类号： H04J3/06 , H04J3/07
CPC分类号： H04J3/0629
摘要： A time division multiplexed signal demultiplexing system for regenerating original signals from a time division multiplexed signal which is obtained by time-division multiplexing information signals of N channels with mutually different sampling or clock frequencies by means of a reference clock signal of a frequency equal to N times of the highest one of the sampling or clock frequencies or an even higher frequency and inserting a dummy signal and a dummy flag bit in pairs in the portion where the information signal is lacking.
摘要翻译：一种时分复用信号解复用系统，用于通过利用等于N的频率的参考时钟信号，以相互不同的采样或时钟频率对具有相互不同的采样或时钟频率的N个信道的信息信号进行时分多路复用而获得的时分复用信号再生原始信号采样或时钟频率中最高的一个或更高频率的时间，并且在信息信号不足的部分中成对插入伪信号和伪标志位。

59. 发明授权

US4668921A Power supply circuit 失效
标题翻译：电源电路
公开(公告)号：US4668921A
公开(公告)日：1987-05-26
申请号：US663180
申请日：1984-10-22
申请人： Eijiro Tamura
发明人： Eijiro Tamura
IPC分类号： H02M7/44 , H02M7/06 , H02M7/12 , H02M7/538 , H03F1/02 , H03F3/217 , H03F3/30
CPC分类号： H03F1/0244 , H03F3/2178
摘要： A power supply circuit having rectifiers and selectable first to n-th power supply voltage terminals for supplying various levels of output voltages. Between respective terminals and an earth, first smoothing capacitors (e.g. C.sub.1 -C.sub.4) are connected. Between i-th terminal and (i-1)-th terminal (wherein, 2.ltoreq.i.ltoreq.n), second smoothing capacitors (e.g. C.sub.5, C.sub.6, C.sub.n, C.sub.n-1) are connected. When i-th terminal is selected, not only capacitance of the first smoothing capacitor connected between the i-th terminal and the earth, but also capacitance of the first capacitor connected between the (i-1)-th terminal and the earth and the second capacitor connected between the i-th and (i-1)-th terminals are utilized for smoothing operation.
摘要翻译：具有整流器和可选择的第一至第n电源电压端子的电源电路，用于提供各种级别的输出电压。在各个端子和地之间，连接第一平滑电容器（例如C1-C4）。在第i个终端和第（i-1）个终端之间（其中，2

60. 发明授权

US4577342A Distortion cancel circuit in FM stereo 失效
标题翻译： FM立体声失真取消电路
公开(公告)号：US4577342A
公开(公告)日：1986-03-18
申请号：US584881
申请日：1984-02-29
申请人： Michinori Naito
发明人： Michinori Naito
IPC分类号： H04B1/10 , H04B1/12 , H04B1/16 , H04H5/00
CPC分类号： H04B1/1661 , H04B1/123
摘要： There is disclosed a distortion cancel circuit in FM stereo receiver, which circuit synthesizes a canceling signal mainly including the distortion component by performing the arithmetic operation for an FM demodulation signal and adjusts the level of this synthesized canceling signal and thereafter subtractively combining it with the FM demodulation signal. This circuit enables the elimination of harmonic distortion which appears in the stereo MPX signal output due to the band characteristic of an intermediate frequency amplifier.
摘要翻译：公开了FM立体声接收机中的失真消除电路，该电路通过对FM解调信号执行算术运算来合成主要包括失真分量的消除信号，并调整该合成消除信号的电平，然后将其与FM 解调信号。该电路能够消除由于中频放大器的频带特性而出现在立体声MPX信号输出中的谐波失真。

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