专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPS5888887A DISPLAY OF REMAINING TAPE LENGTH 失效
公开(公告)号：JPS5888887A
公开(公告)日：1983-05-27
申请号：JP18864981
申请日：1981-11-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUDOU JIYUNICHI , GOTOU HIROSHI
IPC分类号： G11B15/02 , G11B27/17 , G11B27/34
摘要： PURPOSE:To display the remaining tape length when the tape is traveling not at a constant speed, by driving the tape at a constant speed and alternating the travel not at a constant speed to the travel at a constant speed and then displaying the remaining tape length on the basis of the rotational cycle of a reel, the thickness of the tape and the diameter of a reel hub respectively. CONSTITUTION:When a tape is traveling at a constant speed, a tape residue detecting circuit 10 calculates the residue of the tape based on the rotational cycle of a feed reel which is detected by a rotation detector 7, the thickness of the tape obtained by a tape thickness signal producing circuit 8, and the diameter of a tape reel obtained by a hub diameter signal producing circuit 9 to display the remaining tape length at a display circuit 11. While the remaining tape length display switch 1 is operated when the tape is traveling at speed different from the constant value, a constant speed traveling state is secured via a traveling control circuit 3, a latch circuit 2, etc. to display the remaining tape length. Then the tape is rewound back to the starting position of the constant speed traveling to be stopped there. In such a way, the remaining tape length can be displayed also except when the tape is traveling at a constant speed.

12. 发明专利

JPS57138072A TAPE RECORDER 失效
公开(公告)号：JPS57138072A
公开(公告)日：1982-08-26
申请号：JP2259181
申请日：1981-02-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUDOU JIYUNICHI , KAGEYAMA YOSHIKAZU , GOTOU HIROSHI
IPC分类号： G11B27/11 , G11B27/17 , G11B27/34
摘要： PURPOSE:To simplify the constitution, by selectively performing normal tape amount display and display of set position and present position at program searching operation of tape, by one display device. CONSTITUTION:The content of a reel counter 3 is displayed on a lower-order 4 digits of a 5-digit display device 6 with a display driver 5. In case of program search of a tape, when a switch 7 turns on, a tape recorder enters a playback mode. When input is made with the operation of a keyboard 10 by taking the number of recording or program desired for program search as an address, this is displayed on the lower-order 2 digits on the display 6. When the content of the address counter 13 is coincident with that of a present address counter 14, a control signal is outputted from an address comparator 15, and this supplies an instruction which changes the mode from the high-speed playback mode such as fast forward and rewinding to the play mode or the stop mode to a control circuit 8. Thus, the constitution can be simplified.

13. 发明专利

JPS5612111A ELECTRIC POWER SUPPLY UNIT OF ELECTRIC POWER AMPLIFIER 失效
公开(公告)号：JPS5612111A
公开(公告)日：1981-02-06
申请号：JP8774579
申请日：1979-07-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： GOTOU HIROSHI
IPC分类号： H03F1/02
摘要： PURPOSE:To obtain an electric power amplifier of low electric power consumption with less distortion by increasing a supply voltage in accordance with an input signal only when the input signal exceeds a constant value. CONSTITUTION:Electric power amplifier 1 with input terminal 2 is applied with positive and negative electric power voltages from electric power source circuit 12. Those voltage, even when no or a fine input signal arrives, is set large enough for amplifier 1 to operate. Comparators 14 and 15 compare the output voltage of amplifier 1 to voltages of reference voltage sources 16 and 17 and, when the output voltage exceeds a constant voltage, supplies a comparison output to control circuit 13. As a result, control circuit 13 controls electric power source circuit 12 to supply amplifier 1 with an electric power voltage large enough for electric power amplifier 1 to amplify the input signal without distortion.

14. 发明专利

JPS6043905A NEGATIVE FEEDBACK AMPLIFIER 失效
公开(公告)号：JPS6043905A
公开(公告)日：1985-03-08
申请号：JP15213483
申请日：1983-08-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： GOTOU HIROSHI
IPC分类号： H03F1/34
摘要： PURPOSE:To couple directly a line amplifier and a recording amplifier by decreasing a time constant comprising a negative feedback resistor of a negative feedback amplifier and a capacitor between a negative feedback point and a common point less than a time constant viewed from a control circuit to control a transistor (TR) of said capacitor circuit. CONSTITUTION:The negative feedback resistor R3 is connected between an output point of the negative feedback amplifier 2 and its negative feedback point, and a passive circuit having a series capacitor C5 is connected between the negative feedback point and the common point through a switching TR1. The 1st time constant comprising the negative feedback resistor R3 and the capacitor C5 is decreased less than the 2nd time constant comprising an impedance viewed from the control circuit connected to a base of the TR1 and the capacitor C5. Thus, the effect due to a charge current is almost eliminated and distortion is reduced remarkably.

15. 发明专利

JPS59107419A Magnetic recorder 失效
标题翻译：磁记录仪
公开(公告)号：JPS59107419A
公开(公告)日：1984-06-21
申请号：JP21743482
申请日：1982-12-10
申请人： Matsushita Electric Ind Co Ltd
发明人： GOTOU HIROSHI
IPC分类号： G11B27/36 , G11B5/02 , G11B5/035
CPC分类号： G11B5/02
摘要： PURPOSE:To ensure the sufficient compensation of a high band despite of a low level of power supply voltage by extracting a recording signal to be supplied to a magnetic head from a joint between an inductor and a capacitor of a series resonance circuit which is inserted between an output terminal of a line amplifier and an earth or a power supply. CONSTITUTION:The output of a line amplifier 2 is led to a monitor output terminal 3 and also supplied to a series resonance circuit consisting of an inductor L1 and a capacitor C2. Then this output is mixed with bias and supplied to a magnetic head 6 from an intersecting point of the inductor L1 and the capacitor C2 via a resistance R3 for recording of constant current. As a result, the amplitude larger than the power supply voltage is obtained at a resonance point as long as the amplifier 2 has a function to flow a sufficient amoung of current to the resonance circuit of the L1 and the C2. Thus it is possible to perform recording with high quality even with a portable VTR, etc. having a low level of power supply voltage.
摘要翻译：目的：通过从串联谐振电路的电感器和电容器之间的接头提取要提供给磁头的记录信号，确保高电平电压的充分补偿，这是因为插入在线路放大器的输出端子，地线或电源。构成：线路放大器2的输出被引导到监视器输出端子3，并且还提供给由电感器L1和电容器C2组成的串联谐振电路。然后，该输出与偏置混合，并经由用于记录恒定电流的电阻R3从电感器L1和电容器C2的交叉点提供给磁头6。结果，只要放大器2具有将足够的电流流向L1和C2的谐振电路的功能，则在谐振点处获得大于电源电压的振幅。因此，即使具有低电源电压的便携式VTR等，也可以以高质量进行记录。

16. 发明专利

JPS59107418A Magnetic recording and reproducing device 失效
标题翻译：磁记录和再现设备
公开(公告)号：JPS59107418A
公开(公告)日：1984-06-21
申请号：JP21743382
申请日：1982-12-10
申请人： Matsushita Electric Ind Co Ltd
发明人： GOTOU HIROSHI , MORIMOTO TAKEKATSU
IPC分类号： G11B27/36 , G11B5/035
CPC分类号： G11B5/035
摘要： PURPOSE:To produce a magnetic recording/reproducing device with a simple circuit constitution and a low cost and with no deterioration of characteristics, by supplying the monitor output of a record signal to the 1st compensating circuit and the output of the 1st compensating circuit to the 2nd compensating circuit to obtain the output of the 2nd compensating circuit. CONSTITUTION:In a record mode, a resonance circuit consislting of an inductance L1 and a capacitor C1 is connected to a line amplifier 2 in order to compensate the recording loss. The output of the amplifier 2 is mixed with the bias signal, and a record current is supplied to a record/reproduction magnetic head 6. A signal having the integrated characteristics is led to a line output terminal 3 to obtain the sufficiently flat characteristics. In a reproduction mode, the reproduction loss is compensated by the same compensating circuit of the amplifier 2 as the record mode. In such a way, a record amplifier can be excluded and at the same time the loss can by compensated with just a single LPF. Furthermore an additional circuit has a simple constitution. Thus it is possible to produce a magnetic recording/reproducing device with a simple circuit constitution and a low cost and with no deterioration of characteristics.
摘要翻译：目的：通过将记录信号的监视输出提供给第一补偿电路和第一补偿电路的输出，产生具有简单的电路结构和低成本并且不劣化特性的磁记录/再现装置第二补偿电路，以获得第二补偿电路的输出。构成：在记录模式中，将串联电感L1和电容器C1的谐振电路连接到线路放大器2，以补偿记录损耗。放大器2的输出与偏置信号混合，并且将记录电流提供给记录/再现磁头6.具有积分特性的信号被引导到线路输出端子3以获得足够平坦的特性。在再现模式中，再现损失由作为记录模式的放大器2的相同补偿电路补偿。以这种方式，可以排除记录放大器，同时可以通过仅使用单个LPF来补偿损失。此外，附加电路具有简单的结构。因此，可以制造具有简单的电路结构和低成本且不劣化特性的磁记录/再现装置。

17. 发明专利

JPS5922205A Magnetic recording and reproducing device 失效
标题翻译：磁记录和再现设备
公开(公告)号：JPS5922205A
公开(公告)日：1984-02-04
申请号：JP13081382
申请日：1982-07-27
申请人： Matsushita Electric Ind Co Ltd
发明人： GOTOU HIROSHI
IPC分类号： H04N5/7826 , G11B20/02 , G11B20/06
CPC分类号： G11B20/06
摘要： PURPOSE:To record and reproduce fine audio signals with a flying erase head by applying a signal obtained by mixing a signal other than a video signal with an erase signal to the flying erase head. CONSTITUTION:An audio signal is FM-modulated by an FM modulator 8, the modulated signal is mixed with a signal from an erase signal generator 6 by a mixer 9, the mixed signal is amplified by an amplifier 10, and the amplified signal is supplied to heads 4, 5 through slip rings or rotary transformers 11, 12. If 10MHz FM carrier frequency is set up lower than the frequency of an erase signal, an audio signal obtained by FM-modulating the erase signal efficiently by an effect equal to the AC bias of a tape recorder is recorded. The recorded video signal is immediately erased by the erase signal. Subsequently, a video signal is superposed to a track on which the FM-modulated audio signal is recorded by using video heads 2, 3.
摘要翻译：目的：通过将通过将视频信号以外的信号与擦除信号混合而获得的信号施加到飞行擦除头来通过飞擦擦除头记录和再现精细音频信号。构成：通过FM调制器8对音频信号进行FM调制，调制信号通过混频器9与来自擦除信号发生器6的信号混合，混合信号被放大器10放大，并且放大的信号被提供通过滑环或旋转变压器11,12将磁头4,5连接到磁头4,5上。如果将10MHz的FM载波频率设置为低于擦除信号的频率，则通过对擦除信号进行FM调制获得的音频信号有效地等于记录录像机的交流偏压。记录的视频信号立即被擦除信号擦除。随后，通过使用视频头2,3将视频信号叠加在其上记录FM调制音频信号的轨道上。

18. 发明专利

JPS57167183A PROGRAM SEARCHING DEVICE OF TAPE 失效
公开(公告)号：JPS57167183A
公开(公告)日：1982-10-14
申请号：JP5172581
申请日：1981-04-08
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUDOU JIYUNICHI , KAGEYAMA YOSHIKAZU , GOTOU HIROSHI
IPC分类号： G11B15/03 , G11B15/00 , G11B27/22
摘要： PURPOSE:To eliminate missearching of a desired program when searching and reproducing a program of a video tape, etc., by providing each specific counter, a comparing circuit, a program search controlling circuit, a switch, etc. CONSTITUTION:This device is provided with a counter 10 for storing an address of a program positioned at a detecting heat at present, a counter 11 for storing an address of a desired program, and a comparing circuit 12 for comparing each address of the counters 10, 11. Furthermore, it is provided with a program search controlling circuit 13, etc. for outputting a rewind running signal in case when an address of the counter 10 is equal to that of the counter 11 or larger, outputting in order a running stop signal and a reproducing running signal when the address of the counter 10 has become the address -''1'' of the counter 11, also outputting a quick forward running signal at first in case when the address of the counter 10 is smaller than that of the counter 11, outputting a running stop signal when the address of the counter 10 has become equal to that of the counter 11, and subsequently a missearch control circuit 13 is provided to output a rewind running signal.

19. 发明专利

JPS54143001A ELECTRONIC CHANNEL SELECTION UNIT 失效
公开(公告)号：JPS54143001A
公开(公告)日：1979-11-07
申请号：JP5081978
申请日：1978-04-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HIROTA YUTAKA , WATARI KIICHIROU , GOTOU HIROSHI
IPC分类号： H03J5/00 , H03J5/02
摘要： PURPOSE:To prevent fade-in and fade-out operations even if signals are applied to the input of the electronic channel selection circuit of the touch system, etc., to select again one channel when this channel is selected and stored. CONSTITUTION:When a channel selection signal to select CH1 is applied from a touch switch to a at time point X, waveform a' is generated at m, and waveform e is outputted to channel selection coutput n, and these waveforms are stored in non- volatile memory 2. Then, channel switching relay driving signal i is outputted to out put i of memory 2. waveforms at time point Y are obtained when the power source is turned off, and next, the power source is turned on at time point Z. The i output is stored in memory 2 previously; and when a positive signal is generated, waveform i is applied to the channel selection circuit input through resistance R9 and diode D1, and the channel selection circuit is locked at the channel before power off, so that signals can be prevented from being generated at B.

20. 发明专利

JPS5363955A AMPLIFIER 失效
公开(公告)号：JPS5363955A
公开(公告)日：1978-06-07
申请号：JP13997676
申请日：1976-11-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HIGASHIYAMA KATSUHIKO , SANO SHINYA , GOTOU HIROSHI
IPC分类号： H03F1/26 , H03F1/34 , H03F3/20 , H03F3/30
摘要： PURPOSE:To reduce the amplifier noise as well as to enhance the input impedance by constituting the current amplifier part with the bias constant current source and the current amplifier transistor.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式