专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JPS5347754A AMPLIFIER 失效
公开(公告)号：JPS5347754A
公开(公告)日：1978-04-28
申请号：JP12307376
申请日：1976-10-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SANO SHINYA , GOTOU HIROSHI
IPC分类号： H03F1/22 , H03F3/45
摘要： PURPOSE:To improve the properties for the noise, distortion, input capacity and allowable input respectively by applying a boostrap to a cascode bias circuit through a simple circuit.

22. 发明专利

JPS52132660A POWER AMPLIFIER 失效
公开(公告)号：JPS52132660A
公开(公告)日：1977-11-07
申请号：JP4924876
申请日：1976-04-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SANO SHINYA , GOTOU HIROSHI , HIROTA YUTAKA
IPC分类号： H03F1/02 , H03F1/32 , H03F3/18 , H03F3/20 , H03F3/26 , H03F3/30 , H03F3/68
摘要： PURPOSE:To obtain a power amplifier with few switching distortion and high power efficiency, by operating the push-pull amplifier as class ''A'' amplification against load and supplying power dynamically according to the output voltage.

23. 发明专利

JPS52113175A FIELDDTYPE TRANSISTOR 失效
公开(公告)号：JPS52113175A
公开(公告)日：1977-09-22
申请号：JP2949676
申请日：1976-03-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SANO SHINYA , GOTOU HIROSHI , HIROTA YUTAKA
IPC分类号： H01L29/80 , H01L21/337 , H01L27/04 , H01L29/808 , H03F3/45
摘要： PURPOSE:In a differential amplifier of casecade-connected FET, it is intended to make small the input capacity to the amplifier, reduce noise and increase the allowable input level without using any external cascade bias circuit.

24. 发明专利

JPS52112258A ACTIVE LOAD CIRCUIT 失效
公开(公告)号：JPS52112258A
公开(公告)日：1977-09-20
申请号：JP2949776
申请日：1976-03-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SANO SHINYA , GOTOU HIROSHI , HIROTA YUTAKA
IPC分类号： H03F1/26 , H03F1/34 , H03H11/28 , H04R3/00
摘要： PURPOSE:To minimize noise produced from matching load resistance by adding active load circuit for the amplifier including the signal source which requires matching load resistance.

25. 发明专利

JPS52111354A ACTIVE LOAD CIRCUIT 失效
公开(公告)号：JPS52111354A
公开(公告)日：1977-09-19
申请号：JP2871876
申请日：1976-03-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SANO SHINYA , GOTOU HIROSHI , HIROTA YUTAKA
IPC分类号： H03F1/26 , H03H7/38 , H03H11/04 , H03H11/12 , H03H11/28 , H04R3/00
摘要： PURPOSE:To equalize effective load resistance to matching load resistance, and to significantly reduced noise voltage by using in active load circuit comprising current conversion means and converted load resistance, instead of matching load resistance.

26. 发明专利

JPS58100257A PROGRAM SEARCH SIGNAL DETECTOR 失效
公开(公告)号：JPS58100257A
公开(公告)日：1983-06-14
申请号：JP19922381
申请日：1981-12-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： GOTOU HIROSHI , KUDOU JIYUNICHI
IPC分类号： G11B15/087 , G11B27/22 , G11B27/28
摘要： PURPOSE:To prevent malfunction caused by a noise due to temperature fluctuations by reproducing a program search signal recorded on a magnetic tape through a magnetic flux variation sensitive head and processing it through a variable BPF which is controlled according to a tape speed. CONSTITUTION:The passing band of a variable band-pass filter 5 is controlled selectively through a control circuit 8 and a delay circuit 9 according to a tape speed corresponding to a run mode, and a signal which is not within the band is cut off. Therefore, a noise outputted by a magnetic flux variation sensitive head 2 owing to fluctuations of temperature rising by friction against a tape is also cut off and a waveform shaping circuit 6 generates an output corresponding to a reproduced program search signal to prevent malfunction caused by the noise due to temperature fluctuations.

27. 发明专利

JPS5880174A PROGRAM SEARCHING DEVICE OF VIDEO TAPE RECORDER 失效
公开(公告)号：JPS5880174A
公开(公告)日：1983-05-14
申请号：JP17797781
申请日：1981-11-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUDOU JIYUNICHI , GOTOU HIROSHI , KAGEYAMA YOSHIKAZU
IPC分类号： G11B15/087 , G11B27/10
摘要： PURPOSE:To eliminate an interruption of program, by comparing the contents of a present address counter with the contents of a counter which sets the destination address through a comparator in order to detect an accurate start position of reproduction then to fix the start position. CONSTITUTION:The program searching signal of a detection head 11 is delivered from a detecting circuit 14 in the form of the program seaching signal to count up or count down a present address counter 17 and the signal to reset a reel revolution counter 16. The counter 16 is reset and at the same time counts the revolutions of a reel. Then the counter 16 actuates a program searching signal detection inhibiting circuit 13 until the prescribed count number is obtained to inhibit the input of the program searching signal to the circuit 14. Furthermore the contents of the counter 17 is compared with the contents of a destination address counter 18 through a comparator 19. Then the signal is immediately delivered to a mechanical control circuit 20 when the coincidence is obtained from the above-mentioned comparison.

28. 发明专利

JPS5814389A DETECTOR FOR TAPE RESIDUAL AMOUNT OF TAPE 失效
公开(公告)号：JPS5814389A
公开(公告)日：1983-01-27
申请号：JP11422781
申请日：1981-07-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUDOU JIYUNICHI , GOTOU HIROSHI
IPC分类号： G11B27/17 , G11B27/34
摘要： PURPOSE:To surely and accurately detect the residual amount of tape at all times, by detecting the remaining amount of tape from a signal relating to the corrected tape thickness and a signal relating to the tape amount on a supply reel. CONSTITUTION:A rotating period of a supply reel 1 and a winding reel 2 obtained from a reference clock generating circuit 9 and a period count circuit 8 is inputted to a tape amount operation circuit 10, a signal corresponding to a hub and the tape amount to be detected is inputted to a tape type discrimination circuit 11 to discriminate the kind of a tape 3. A tape amount reference signal generating circuit 12 inputs the discrimination signal and outputs a tape amount reference signal according to the type of tape and a tape amount comparison circuit 13 compares the reference signal with the signal from the circuit 10 to output a difference signal. This signal is inputted to a tape thickness correction circuit 14 to correct the thickness of tape. The corrected tape thickness is outputted to a tape residual amount operating circuit 15. In the circuit 15, the tape amount on the reel 1 and the corrected tape thickness converts the residual amount of tape into the unit of length and given to a tape residual amount display.

29. 发明专利

JPS5658150A MAGNETIC TAPE DISCRIMINATING DEVICE 失效
公开(公告)号：JPS5658150A
公开(公告)日：1981-05-21
申请号：JP13401579
申请日：1979-10-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SAITOU HIROSHI , GOTOU HIROSHI , KUDOU JIYUNICHI
IPC分类号： G11B15/02 , G11B27/17
摘要： PURPOSE:To discriminate the type of a magnetic tape, by detecting the rotational cycle for both the supply reel and the take-up reel of the tape and then obtaining the side area of the tape rolled up to both reels each from the above detected signals. CONSTITUTION:The rotary disks 4 and 4' are provided to the supply reel 3 and the take-up reel 3', and then the slit is formed to the disks 4 and 4' each. The detectors 5 and 5' consisting of the light source and the optical detector are provided with the rotary disks held between, and thus the pulses are delivered in accordance with the rotating slits. These pulses are divided by the dividing circuits 8 and 8' after the amplification and shaping to obtain the cycle signals of the reels 3 and 3'. These cycle signals are gated by the reference clock signal and then counted to obtain the analog signals corresponding to the rotational cycle of the reels and through the converters 12 and 12'. This analog signal receives a square addition through the arithmetic circuit 13. The output of the circuit 13 is proportional to the side area of the tape rolled up to the reel. And the side area corresponds to the type of the tape. As a result, the type can be discriminated for the tape.

30. 发明专利

JPS5612698A ECHO ATTACHING APPARATUS 失效
公开(公告)号：JPS5612698A
公开(公告)日：1981-02-07
申请号：JP8859179
申请日：1979-07-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： GOTOU HIROSHI , SANO SHINYA
IPC分类号： G10K15/08 , G10K15/10

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