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11. 发明专利

JPS5930209A Magnetic recording and reproducing device 失效
标题翻译：磁记录和再现设备
公开(公告)号：JPS5930209A
公开(公告)日：1984-02-17
申请号：JP14054782
申请日：1982-08-12
申请人： Matsushita Electric Ind Co Ltd
发明人： HONJIYOU MASAHIRO , KOBAYASHI MASAAKI , HASHIMA AKIO
IPC分类号： G11B5/02
CPC分类号： G11B5/02
摘要： PURPOSE:To perform short-wavelength recording by providing two recording and reproducing heads which have specific widths, putting the 1st head in charge of recording and the 2nd head in charge of reproduction during the 1st period and inverting their operations at the next timing, and thus alternating their operation. CONSTITUTION:A switch SW2 is turned on in a time t1-t2, and a switch SW1 is turned on in a time t2-t3. A signal passed through the switch SW2, i.e. signal detected by a heat tip part is delayed through a delay circuit 5 by a time Tl, phase-inverted by a phase inverting circuit 6, and sent to a mixing circuit 7. At this mixing circuit 7, this signal has the same waveform as a signal passed through the switch SW1 has, and they are added together to improve the S/N by 6dB. Thus, burstlike recording is carried out to eliminate recording demagnetization and gap loss even during reproduction, so this device suits for the short-wavelength recording; and plural recording and reproducing heads are used to record and reproduce a continuous wave.
摘要翻译：目的：通过提供具有特定宽度的两个记录和再现头来执行短波长记录，使第一个头部负责记录，第二个头部在第一个时间段内负责再现，并在下一个时间转换它们的操作，以及从而交替操作。构成：在时间t1-t2中开关SW2导通，并且在时间t2-t3中开关SW1导通。通过开关SW2的信号，即由热尖端部分检测出的信号，通过延迟电路5被相位反相电路6相位反转的时间T1延迟，并发送到混频电路7.在该混频电路如图7所示，该信号与通过开关SW1的信号具有相同的波形，并且将它们相加在一起以将S / N提高6dB。因此，即使在再现期间也进行突发状记录以消除记录退磁和间隙损失，因此该装置适合短波长记录; 并且使用多个记录和再现头来记录和再现连续波。

12. 发明专利

JPS58164073A DEVICE FOR OUTPUTTING REMAINING TIME OF TAPE 失效
公开(公告)号：JPS58164073A
公开(公告)日：1983-09-28
申请号：JP4755382
申请日：1982-03-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HASHIMA AKIO , SHIMOTASHIRO MASAFUMI
IPC分类号： G11B27/17 , G11B27/13
摘要： PURPOSE:To correctly find remaining time of a tape under all modes, by detecting and operating signals proportional to the rotating cycle of the reel at the feeding side when tapes are run at a fixed speed, and detecting and calculating the number of revolution of the reel at the feeding side when the tape runs at an unfixed speed. CONSTITUTION:The output of a rotating cycle detecting section 1 of the feeding side reel is given to an operating section 2 for calculating the remaining time of a tape. Discrimination of the diameter of a reel hub is performed at an operating section 3 for discriminating the hub diameter and the output of the operating section 3 is also given to the operating section 2. The input information required for discriminating the hub diameter is obtained from the detecting section 1 and a separately installed rotating cycle detecting section 4 of the winding side reel. The remaining time of the tape thus calculated is outputted from the operating section 2 and displayed in an output section 5. When the remaining time of a tape is known at the begining by running the tape at a fixed speed, the remaining time of the tape can be outputted and displayed thereafter even when the tape is run under vaious operations modes.

13. 发明专利

JPS56146306A OSCILLATOR 失效
公开(公告)号：JPS56146306A
公开(公告)日：1981-11-13
申请号：JP4969380
申请日：1980-04-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOYAMA ICHIROU , HASHIMA AKIO
IPC分类号： H03F3/45 , H03B5/00 , H03B5/02
摘要： PURPOSE:Not only to reduce the power consumption but to obtain a flat frequency characteristic with virtually no attenuation at an output and by a high frequency, by using a differential amplifying circuit utilizing effectively the features of said amplifying circuit to the output part of a feedback-type resonator. CONSTITUTION:The balanced inputs applied through the input terminals 32 and 33 are applied to each base electrode of transistors(TR) 19-22 with virtually no variation by the diodes 23 and 24 that are working in the forward direction. The balanced outputs having nearly the same phase as the input are extracted at the emitter electrodes of TRs 19 and 20. Each electrode of these outputs is connected to each other via the resistance loads 25 and 26 of the equal value concerning the inphase outputs. Accordingly, in terms of function, the active load which is driven in the same phase by TRs 19 and 20 is furthermore driven by a differential amplifying circuit comprising TRs 21 and 22.

14. 发明专利

JPS56140689A CIRUCUIT UNIT USING PRINTED CIRCUIT BOARD 失效
公开(公告)号：JPS56140689A
公开(公告)日：1981-11-04
申请号：JP4299380
申请日：1980-04-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HASHIMA AKIO
IPC分类号： H05K1/02

15. 发明专利

JPS5546643A DOWN CONVERTER 失效
公开(公告)号：JPS5546643A
公开(公告)日：1980-04-01
申请号：JP12005278
申请日：1978-09-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HASHIMA AKIO
IPC分类号： H03J7/02 , H04B1/26
摘要： PURPOSE:To stabilize the performance of TV reception of UHF and SHF bands, by performing frequency control of a local oscillator corresponding to a difference between converter output frequency and reference frequency. CONSTITUTION:This converter is equipped with local oscillator 10 with a function of providing variation in frequency by a voltage and frequency discriminator 9 which generates a frequency control voltage by detecting the frequency shift of frequency mixing output signal F2 obtained by frequency-mixing 8 output signal f1 generated on the arrival of input signal fd and reference frequency signal F1 provided separately. Then, the oscillation frequency of local oscillator 10 is controlled by the output of discriminator 9. In this case, signal F1 and center frequency fd of discriminator 9 are set to F1=(f1+f2)/2 and fd=(f2-f1)/2 respectively, providing that f1 and f2 (f1

16. 发明专利

JPS52140219A TUNER UNIT 失效
公开(公告)号：JPS52140219A
公开(公告)日：1977-11-22
申请号：JP5736276
申请日：1976-05-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HASHIMA AKIO
IPC分类号： H04B1/16 , H04B1/26
摘要： PURPOSE:To remove the disturbance signal contained in the reception frequency band by switching the pass band of the input filter in relation to the change of the local oscillation frequency which determines the reception frequency.

17. 发明专利

JPS5126411A 失效
公开(公告)号：JPS5126411A
公开(公告)日：1976-03-04
申请号：JP9965574
申请日：1974-08-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FURUHASHI MICHIO , HASHIMA AKIO , KITAICHI SATOSHI , TONARI HIROHIKO
IPC分类号： H04N5/00 , H04N7/00 , H04N7/025 , H04N7/03 , H04N7/035

18. 发明专利

JPH0533442B2 失效
公开(公告)号：JPH0533442B2
公开(公告)日：1993-05-19
申请号：JP1879784
申请日：1984-02-02
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OCHI ATSUO , TOMITA MASAO , HASHIMA AKIO
IPC分类号： G11B5/02 , G11B5/027 , G11B5/53 , G11B15/14 , G11B33/12

19. 发明专利

JPH0160992B2 失效
公开(公告)号：JPH0160992B2
公开(公告)日：1989-12-26
申请号：JP7847983
申请日：1983-05-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOBAYASHI MASAAKI , MATSUMOTO TOKIKAZU , HASHIMA AKIO
IPC分类号： H04N11/08 , H04N11/18 , H04N11/24

20. 发明专利

JPS6126843B2 JPS6126843B2 - 失效
公开(公告)号：JPS6126843B2
公开(公告)日：1986-06-23
申请号：JP13895180
申请日：1980-10-03
申请人： Matsushita Electric Ind Co Ltd
发明人： KOYAMA ICHIRO , HASHIMA AKIO , UENO TOMOKI
IPC分类号： H01P1/205 , H01P1/202 , H01P7/04
CPC分类号： H01P1/202

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