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81. 发明专利

JPS58182105A Rotary head device 失效
标题翻译：旋转头设备
公开(公告)号：JPS58182105A
公开(公告)日：1983-10-25
申请号：JP6590582
申请日：1982-04-19
申请人： Matsushita Electric Ind Co Ltd
发明人： HARAMURA SHINICHIROU
IPC分类号： G11B5/02 , G11B15/14
CPC分类号： G11B15/14
摘要： PURPOSE:To record and reproduce a signal through a single rotary switch and to simplify structure by bringing plural heads fitted to a rotary cylinder and a preamplifier under the optical switching control under the controller of a fixed part. CONSTITUTION:The rotary cylinder 10 is provided with the plural magnetic heads 12a-12n, a switching circuit 11 incorporating the preamplifier which is not shown in a figure, photodetecting elements 15a-15n connected to the switching circuit 11, and the rotor 13R of a rotary transformer 13. The control circuit 14 having light emitting elements 16a-16n controls the switching circuit 11 optically without contacting and also controls a changeover switch 17. During recording, an input signal 20 is amplified at a part 18 and the switch 17 is connected to the R to input the signal by the rotary transformer 13; and the controller 14 places the rotary cylinder 10 in a recording state through photocouplers 16 and 15. During reproduction, the rotary cylinder 10 is placed in a reproduction state and the outputs of the heads 12 are passed through the rotary transformer 13, amplified at a part 19, and outputted from a terminal 21. Consequently, only one rotary transformer is used and the structure is simplified.
摘要翻译：目的：通过单个旋转开关记录和再现信号，并通过在固定部分的控制器下的光学切换控制下安装旋转圆筒和前置放大器的多个头来简化结构。构成：旋转圆筒10设置有多个磁头12a-12n，内置未图示的前置放大器的开关电路11，与开关电路11连接的受光元件15a〜15n以及与开关电路11连接的转子13R 旋转变压器13.具有发光元件16a-16n的控制电路14在不接触的情况下光学地控制开关电路11，并且还控制切换开关17.在记录期间，输入信号20在部分18处被放大，并且开关17被连接通过旋转变压器13向R输入信号; 并且控制器14通过光耦合器16和15将旋转圆筒10放置在记录状态。在再现期间，旋转圆筒10被放置在再现状态，并且头12的输出通过旋转变压器13，在部分19，并且从端子21输出。因此，仅使用一个旋转变压器并且简化了结构。

82. 发明专利

JPS57120215A Digital signal recording and/or reproducing apparatus 失效
标题翻译：数字信号记录和/或复制设备
公开(公告)号：JPS57120215A
公开(公告)日：1982-07-27
申请号：JP18791481
申请日：1981-11-25
申请人： Bosch Gmbh Robert
发明人： YOOZEFU ZOKOA
IPC分类号： G11B5/09 , G11B5/008 , G11B5/53 , G11B15/14 , G11B20/10 , G11B20/12 , H04N5/926
CPC分类号： H04N5/926 , G11B5/00865 , G11B5/534 , G11B15/14 , G11B20/10

83. 发明专利

JPS5745785A Voice signal noise eliminating circuit for magnetic record reproducing device 失效
标题翻译：用于磁记录复制设备的语音信号消除电路
公开(公告)号：JPS5745785A
公开(公告)日：1982-03-15
申请号：JP12105080
申请日：1980-09-03
申请人： Hitachi Ltd
发明人： ITOU SHIGEYUKI , WATAYA YOSHIZUMI
IPC分类号： H04N5/93 , G11B15/14 , H04N5/911
CPC分类号： G11B15/14 , H04N5/911
摘要： PURPOSE:To eliminate noise of large amplitude at the time of changeover of reproducing track without causing disturbance of reproduced picture and deterioration of sound quality by using a reproducing track change signal and a synchronizing reproducing track change signal changing them at need. CONSTITUTION:Reproducing signals are taken out from a magnetic recording medium by a reproducing head 2 or 3 and inputted to a changeover switch circuit 6 through a preamplifier 4 or 5, respectively, and the reproducing track is changed by the circuit 6. When noise is generated in reproducing voice signals, a retriggerable monostable multivibrator 21 is activated to detect the dropout of signal 19, and a changing circuit consisting of AND circuits 22, 23 and an OR circuit 24 is controlled by the detection signal. When the signal 19 is in lacking state, a reproducing track changeover signal 16 is outputted. In other cases, a synchronized reproducing track changeover signal 25 synchronized to zero cross point of periodical noise obtained from the monostable multivibrator 15 and FF17 is outputted to control a holding signal generating circuit 27 and the circuit 6. Thus, noise at the time of reproducing track changeover is eliminated.
摘要翻译：目的：通过使用再现轨道改变信号和同步再现轨道改变信号在需要时改变它们来消除重放轨迹转换时的噪声，而不会引起再现画面的干扰和声音质量下降。构成：通过再现头2或3从磁记录介质中取出再现信号，并通过前置放大器4或5分别输入到转换开关电路6，再现轨道由电路6改变。当噪声为在再现语音信号中产生的，可再触发单稳态多谐振荡器21被激活以检测信号19的丢失，并且由AND电路22,23和OR电路24组成的改变电路由检测信号控制。当信号19处于缺少状态时，输出再生轨道切换信号16。在其他情况下，输出与从单稳态多谐振荡器15和FF17获得的周期性噪声的零交叉点同步的同步再现轨道切换信号25，以控制保持信号发生电路27和电路6.因此，再现时的噪声轨道切换消除。

84. 发明专利

JPS5737708A Electronic switching device 失效
标题翻译：电子开关装置
公开(公告)号：JPS5737708A
公开(公告)日：1982-03-02
申请号：JP11421880
申请日：1980-08-20
申请人： Toshiba Corp
发明人： TANAKA TAKASHI
IPC分类号： H04N5/91 , G11B5/027 , G11B15/14
CPC分类号： G11B15/14
摘要： PURPOSE:To switch heads by composing an amplifier of FETs and by providing a swiching element turning off one FET and another switching element short-circuiting a front stage for rotary-head initial-stage amplifier switching. CONSTITUTION:The outputs of video heads 41A and 41B are applied to amplifying elements 47A and 47B through rotary transformers. When a switching signal 58 goes up to a high level, a transistor (TR)61 turns on, so a TR48A turns off, so that a TR44A turns on. The FET47A is so set that its amplifying function is stopped. On the other hand, a TR48B turns on and the FET47B performs amplifying operation. A TR44B turns off and a reproduced signal induced by the video head 41B is passed through the rotary transformer 42B and amplified by the FET 47B, whose output is led to an output terminal 56. When the switching singal goes down to a low level, the reverse operation is carried out.
摘要翻译：目的：通过组合FET的放大器和通过提供切换元件关闭一个FET和另一个开关元件来短路前级用于旋转头初级放大器切换来切换磁头。结构：视频头41A和41B的输出通过旋转变压器施加到放大元件47A和47B。当开关信号58上升到高电平时，晶体管（TR）61导通，因此TR48A截止，使得TR44A导通。 FET47A设置为使其放大功能停止。另一方面，TR48B导通，FET47B进行放大动作。 TR44B关闭，并且由视频头41B感应的再现信号通过旋转变压器42B，并由FET 47B放大，其输出被引导到输出端56.当开关信号降低到低电平时，进行反向操作。

85. 发明专利

JPS5730104A Head signal switching system 失效
标题翻译：头信号切换系统
公开(公告)号：JPS5730104A
公开(公告)日：1982-02-18
申请号：JP10369680
申请日：1980-07-30
申请人： Hitachi Denshi Ltd
发明人： NAKAMURA NATSUKI
IPC分类号： G11B27/36 , G11B15/14 , H04N5/91
CPC分类号： G11B15/14
摘要： PURPOSE:To improve the S/N ratio of a reproduced signal while managing with only one head amplifier by equipping switch elements in a rotary drum and by controlling it by an erasure signal. CONSTITUTION:During recording, an input signal is applied via a rotary transformer 6. An erasure signal is applied to an erasing head 5 through a rotary transformer 8 and also supplied to an erasure signal detecting circuit 17, and switch elements are placed at recording sides respectively by a signal from switch driving circuit 18. The said recorded signal is applied to a recording head 3. The output of a monitor head 4 is outputted by a rotary transformer 7 via the switch elements and a head amplifier 16 to monitor the recording operation. During reproduction, no erasure signal is applied and the switch elements are at reproduction sides, so that the output of the head 3 is outputted from the rotary transformer 7 via the switch element and head amplifier 16.
摘要翻译：目的：为了提高再生信号的信噪比，同时仅通过一个头放大器管理旋转鼓中的开关元件，并通过擦除信号进行控制。构成：在记录期间，通过旋转变压器6施加输入信号。擦除信号通过旋转变压器8施加到擦除头5，并且还提供给擦除信号检测电路17，并且开关元件被放置在记录侧分别通过来自开关驱动电路18的信号将所述记录信号施加到记录头3.监视器头4的输出由旋转变压器7经由开关元件和头放大器16输出以监视记录操作。在再现期间，不施加擦除信号并且开关元件在再现侧，从而头3的输出经由开关元件和头放大器16从旋转变压器7输出。

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