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81. 发明专利

JPS55128952A DEMODULATOR CIRCUIT OF MORSE SIGNAL 失效
公开(公告)号：JPS55128952A
公开(公告)日：1980-10-06
申请号：JP3656979
申请日：1979-03-27
申请人： KENWOOD CORP
发明人： OGINO HIDEO , KUNIKANE SATOSHI
IPC分类号： H03D1/00 , H04L15/24 , H04L27/00 , H04L27/06
摘要： PURPOSE:To increase both the frequency selection and input level selection performance by providing the analog comparators of different threshold levels to supply the same Morse signal and then processing the output of the comparators via the differentiating ciruit and the mono-multi each. CONSTITUTION:The tone burst signals applied to terminal IN are supplied to comparators CM4 and 5. The threshold level of CM4 is set lower than that of CM5, and the input signals are converted into the pulse waveforms through CM4 and CM5. Then the fall of the pulse waveform is differentiated 6 and 7 to give triggering to multis 8 and 10. The triggering is given to multi 9 with output Q of multi 8, and multis 8 and 9 are reset with output Q of multi 10 each. Then the output obtained by differentiating 12 the rise of output Q of multi 8 is supplied to NAND circuit 13 along with output Q of multis 8 and 9, and the triggering is given to multi 11 via the output of circuit 13. At the same time, output Q of multi 11 is supplied to circuit 13, and the demodulation output is obtained from multi 11. As a result, the selection performance can be increased to both the frequency and the input level, at the same time ensuring the suppressing function to the noise.

82. 发明专利

JPS5158003A 失效
公开(公告)号：JPS5158003A
公开(公告)日：1976-05-21
申请号：JP13239274
申请日：1974-11-18
申请人： HAGIWARA TOSHIO
发明人： HAGIWARA TOSHIO
IPC分类号： H03M5/00 , H03M7/00 , H04L15/24

83. 发明专利

JPH1132090A MORSE SIGNAL PROCESSING METHOD 失效
公开(公告)号：JPH1132090A
公开(公告)日：1999-02-02
申请号：JP21793697
申请日：1997-07-09
申请人： YAMAZAKI TSUTOMU
发明人： YAMAZAKI TSUTOMU
IPC分类号： H04L15/04 , H04L15/24
摘要： PROBLEM TO BE SOLVED: To improve the identification of Morse codes by leading or delaying the timewise position of at least one edge part among the rising front edge part and falling rear edge part of Morse signals and adjusting the timewise length of the Morse signals and the timewise length of an interval. SOLUTION: A front edge delay part 3 delays the timewise position of the front edge of the Morse signals and a rear edge delay part 4 delays the timewise position of the rear edge. A capacitor C1 is charged by a time constant C1 R1 at the front edge of the Morse signals and discharged at the rear edge. For instance, if C1 =10 F, R1 =10 Ω and r1 =10Ω, the front edge of the Morse signals is delayed about 100 milliseconds with C1 R1 =100 millisecond. The rear edge essentially is not delayed with C1 r1 =0.01 millisecond. Similarly, if C2 =10 F, R2 =10 Ω and r2 =10Ω, the front edge essentially is not delayed with C2 r2 =0.01 millisecond. The rear edge is delayed by about 100 milliseconds with C2 R2 =100 milliseconds. A waveform is shaped in buffer logics B1 and B2 .

84. 发明专利

JP2788743B2 失效
公开(公告)号：JP2788743B2
公开(公告)日：1998-08-20
申请号：JP31269788
申请日：1988-12-09
申请人： AIKOMU KK
发明人： HIROHATA ATSUSHI
IPC分类号： H04L15/24 , H03H19/00

85. 发明专利

JPH08293814A TELEGRAPH RADIO EQUIPMENT 失效
公开(公告)号：JPH08293814A
公开(公告)日：1996-11-05
申请号：JP9928095
申请日：1995-04-25
申请人： ARUINKO KK
发明人： HIROHATA ATSUSHI , YAMASHITA YOSHINOBU , ADACHI TOSHIO
IPC分类号： H04B1/26 , H04B1/40 , H04L15/04 , H04L15/24
摘要： PURPOSE: To make a reception pitch frequency match with a side tone frequency, to precisely execute zero-in and to set manufacturing cost to be inexpensive. CONSTITUTION: A first local oscillator 2 generating a first local oscillation signal for transmitting/receiving a telegraph radio equipment and a second local oscillator 3 generating a second local oscillation signal are provided. A side tone is generated by frequency-dividing a phase comparison signal in the second local oscillator 3 by 1/100 and turning on/off the operation of an active low pass filter 56 in accordance with the turning on/off of a key K1. MPU 10 controlling the whole operation of the telegraph radio equipment controls the reception pitch frequency fp being a beat frequency and the side tone frequency fs, which are generated at the time of receiving a telegraph code, in such a way that they become equal. The reception pitch frequency fp can be changed by reception pitch frequency change-over switches SW3 and SW4.

86. 发明专利

JPH0370949B2 失效
公开(公告)号：JPH0370949B2
公开(公告)日：1991-11-11
申请号：JP16264084
申请日：1984-07-31
申请人： ZENI LITE BUOY CO LTD
发明人： SATO JUJI
IPC分类号： H04L15/24 , H04L25/08 , H04L25/40

87. 发明专利

JPS6141255A Signal detecting method 失效
标题翻译：信号检测方法
公开(公告)号：JPS6141255A
公开(公告)日：1986-02-27
申请号：JP16264084
申请日：1984-07-31
申请人： Zeniraito V:Kk
发明人： SATO YUJI
IPC分类号： H04L15/24 , H04L25/08 , H04L25/40
CPC分类号： H04L25/40
摘要： PURPOSE:To detect accurately a specific mark with the prescribed timing and also to prevent the misoutput of the detection signal due to the misdetection, by using a comparatively short space deciding time which is slightly longer than a space of a long time width following a pre-space for detection of this pre-space and using a comparatively short mark deciding time slightly longer than a mark of a longer than a long time width following the specific mark for detection of this specific mark. CONSTITUTION:The space deciding time Ts is set at about 0.2sec, for example, that is shorter than the time width of a normal pre-space in a reception signal, i.e., the time width of the longest space and also slightly longer than the time width of the 2nd longest space. While the mark deciding time Tm is set at about 0.5sec, for example, that is shorter than the time width of a normal specific mark in the reception signal, i.e., the time width of the longest mark and also slightly longer than the time width of the 2nd longest mark. The time Ts has the shorter time width than that of the time Tm. Therefore a mark identification signal and the 1st and 2nd latch signals are outputted with the prescribed timing of a specific mark. Then this specific mark can be detected accurately with the prescribed timing.
摘要翻译：目的：在规定的时间内精确检测特定的标记，并且通过使用相对较短的空间决定时间，比预先设定的长时间宽度的空间稍长，以防止由于误检而导致的检测信号的错误输出 - 用于检测该预留空间的空间，并且使用比标记更长的比较短的标记决定时间，其长度大于具有用于检测该特定标记的特定标记的长时间宽度的标记。构成：空间决定时间Ts设定为例如比接收信号中的正常预留空间的时间宽度短的约0.2秒，即最长空间的时间宽度，并且稍长于时间宽度第二长的空间。虽然标记判定时间Tm设定为例如比接收信号中的正常特定标记的时间宽度（即，最长标记的时间宽度）还稍长于时间宽度的大约0.5秒是第二长的标记。时间Ts具有比时间Tm短的时间宽度。因此，标记识别信号和第一和第二锁存信号以特定标记的规定定时输出。然后可以在规定的时间内准确检测该特定标记。

88. 实用新型

JPS60186742U 失效
公开(公告)号：JPS60186742U
公开(公告)日：1985-12-11
申请号：JP7365384
申请日：1984-05-19
IPC分类号： H04L15/24

89. 发明专利

JPS5532064B2 失效
公开(公告)号：JPS5532064B2
公开(公告)日：1980-08-22
申请号：JP11807173
申请日：1973-10-19
IPC分类号： H03M5/08 , G01D5/12 , G08C19/28 , G08C25/00 , H04L15/24 , H04L25/00 , H04L25/49 , H04Q9/00 , H04Q9/10 , H04Q9/14

90. 实用新型

JPS538939U 失效
公开(公告)号：JPS538939U
公开(公告)日：1978-01-25
申请号：JP9015476
申请日：1976-07-07
IPC分类号： H03M5/16 , G01D5/244 , G08C25/00 , H03K5/00 , H04L15/24 , H04L25/02 , H04L25/49

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