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51. 实用新型

JPS5715529U 失效
公开(公告)号：JPS5715529U
公开(公告)日：1982-01-26
申请号：JP9281980
申请日：1980-06-30
IPC分类号： H03J7/20 , H03J7/02 , H03J7/22

52. 发明专利

JPS568919A ELECTRONIC TUNING TYPE CHANNEL SELECTOR 失效
公开(公告)号：JPS568919A
公开(公告)日：1981-01-29
申请号：JP8403479
申请日：1979-07-04
申请人： TEXAS INSTRUMENTS JAPAN
发明人： HARADA MASACHIKA , ASAHI KOUJI
IPC分类号： H03J7/02 , H03J7/22 , H03J7/28
摘要： PURPOSE:To obtain an accurate tuning point by detecting an AFT voltage reaching two threshold levels shifting from the best tuning point positively and negatively by a fixed value. CONSTITUTION:Once a frequency sweep reaches the 1st tuning point, namely, when the 1st tuning voltage X at the 1st tuning point is detected by information counter 9, arithmetic circuit 41 counts the output of a 1/4 counter that frquency- divides a clock input. At this time, information counter 9 keeps on counting and when the frequency sweep reaches the 2nd tuning point, the count operation of the arithmetic circuit is stopped. Denoting a voltage at the 2nd tuning point as Y, the final count value of the arithmetic circuit is represented as X+(Y-X)/4 and this value is stored in memory 8 at a fixed address as the best tuning point.

53. 实用新型

JPS54165127U JPS54165127U - 失效
公开(公告)号：JPS54165127U
公开(公告)日：1979-11-20
申请号：JP6293178
申请日：1978-05-11
IPC分类号： H03J7/18 , H03J7/20 , H03J7/22 , H03J7/30 , H04B1/34

54. 发明专利

JPS5449015A AUTOMATIC CHANNEL SELECTOR 失效
公开(公告)号：JPS5449015A
公开(公告)日：1979-04-18
申请号：JP11621877
申请日：1977-09-26
申请人： SHARP KK
发明人： MINOURA NOBUO , YOSHINAGA YASUKAZU , MATSUMURA ISAO , ABUMI TAKAO , NAKAI KAZUHIRO
IPC分类号： H03J7/18 , H03J7/20 , H03J7/22 , H04N5/44
摘要： PURPOSE:To prevent the malfunction of preset channel selection by automatizing all of preset channel selections and by providing a noise SCAP circuit against disturbing radio waves and noises so as to reveive a TV signal accurately. CONSTITUTION:This device is equipped with start-stop circuit 9 which outputs a search start and stop signals by being supplied with a search start command, the output of AFT circuit 4 of the TV receiver and the output of synchronizing separarator circuit 6, tuning voltage generating circuit 10 which is controlled by the output signal of circuit 9, and memory circuit 11 which is stored with the tuning voltage of circuit 10. In order to discriminate whether a TV signal is a normal tuning signal or noise signal, noise SCAP curcuit 13 is provided which is provided with integrating noise circuit 14, noise detection circuit 15 and synchronizing signal amplification part 16. When the TV signal is identified as a noise signal, a restart command is supplied to circuit 9. The SCAP level of this SCAP circuit is set by variable resistor VR1 provided to circuit 15 corresponding to the strength of a received radio wave.

55. 发明专利

JPS5449014A AUTOMATIC CHANNEL SELECTOR 失效
公开(公告)号：JPS5449014A
公开(公告)日：1979-04-18
申请号：JP11621777
申请日：1977-09-26
申请人： SHARP KK
发明人： MINOURA NOBUO , YOSHINAGA YASUKAZU , MATSUMURA ISAO , ABUMI TAKAO , NAKAI KAZUHIRO
IPC分类号： H03J7/18 , H03J7/20 , H03J7/22 , H04N5/44
摘要： PURPOSE:To eliminate the trouble of operation by automatically making all of preset channel selections and detecting the tuning of each normal channel selection, and by presetting the them again when some channels have a difference in tuning CONSTITUTION:This device is provided with start stop circuit 9 which outputs a search start signal and search stop signal by being supplied with the channel selection signal of AFT circuit 4 of the TV receiver, the vertical synchronizing signal of synchronizing separator circuit 6, and a search start command tuning voltage generating circuit 10 which is controlled by the start and stop signals of this circuit 9. In addition, this is provided with memory circuit 11 stored with the tuning voltage from this circuit 10 as it desires and signal discrimination circuit 12 supplying the tuning voltage from circuit 11 to tuner 2. Then, tuning-differenc detection circuit 15, provided to this circuit, is operated on the basis of a channel selection command during a channel selection, and when circuit 15 detects a tuning difference, a research start signal is supplied to circuit 9 so as to attain the preset channel selection again.

56. 发明专利

JPS5449013A AUTOMATIC CHANNEL SELECTOR 失效
公开(公告)号：JPS5449013A
公开(公告)日：1979-04-18
申请号：JP11621277
申请日：1977-09-26
申请人： SHARP KK
发明人： MINOURA NOBUO , YOSHINAGA YASUKAZU , MATSUMURA ISAO , ABUMI TAKAO , NAKAI KAZUHIRO
IPC分类号： H03J7/18 , H03J7/22 , H03J7/28 , H04N5/44
摘要： PURPOSE:To simplify the operation of an automatic channel selector by automatizing preset channel selection by automatically storing the tuning voltage of each channel selected automatically in an memory in sequence. CONSTITUTION:This device is equipped with search start-stop circuit 9 which outputs a search start signal and search stop signal by being supplied with an AFT detection output voltage from AFT circuit 4 of the TV receiver, the output of synchronizing separator circuit 6, and a search start command, and turning voltage generating circuit 10 which is controlled by the start and stop signals of this circuit 9. In addition, it is equipped with memory circuit 11 stored with the tuning voltage from voltage generating circuit 10 as it desires and signal decision circuit 12 supplying the output of memory 11 to tuner 2. Through the control of sircuit 9, voltage generating circuit 10 is made to generate a gradually-varying tuning voltage at the variation ratio which is decreased when an AFT detection output signal is detected and whose gradient is inverted by the polarity of the AFT signal output signal.

57. 发明专利

JPS5247314A SCANNING RECEIVING EQUIPMENT 失效
公开(公告)号：JPS5247314A
公开(公告)日：1977-04-15
申请号：JP12303775
申请日：1975-10-13
申请人： JAPAN RADIO CO LTD , KOKUSAI DENSHIN DENWA CO LTD
发明人： NAMIMA KOUZOU , NISHIZAWA TAROU , YAMAMOTO HIROAKI , SHIONO TOORU
IPC分类号： H03J7/20 , H03J7/18 , H03J7/22 , H04B7/26 , H04L13/18 , H04L17/16 , H04W4/00 , H04W72/04 , H04W84/02 , H04W84/08 , H04W88/02
摘要： PURPOSE:Both AFC and AGC circuits which operate corresponding to channel switching timing in order to secure sure scanning reception for several channels with one receiving equipment.

58. 发明专利

JP2006502614A Television system with controlled are tuning function 有权
公开(公告)号：JP2006502614A
公开(公告)日：2006-01-19
申请号：JP2004541059
申请日：2003-09-18
申请人：コーニンクレッカフィリップスエレクトロニクスエヌヴィKoninklijke Philips Electronics N.V.
发明人：エイチサイード，アクバル , バート，ジャナルダーナ , ティーレオン，テック
IPC分类号： H03J1/00 , H03J7/06 , H03J7/20 , H03J7/22 , H04N5/44
CPC分类号： H04N5/50 , H03J1/0008 , H03J7/065 , H03J7/22 , H04N5/04 , H04N21/4263 , H04N21/4384
摘要：テレビジョンシステムは、チューナ１、該チューナ１を制御するコントローラ２、及び該チューナ１からの同調された信号を受け、制御信号をコントローラに供給するステージ３を有しており、高速チューニングの間に、時間の無駄であるオートマチック・ファイン・チューニング信号を使用する。制御信号としてステージ３におけるフェーズロックループ３１からのロック信号５３を使用することで、チャネルがアクティブであるか否かに関する指示は、オートマチック・ファイン・チューニング信号よりもロック信号が非常に迅速に利用可能であるので、非常に迅速に得ることができる。更なる制御信号として同期発生器４からの同期信号５４を使用することで、更なる指示が得られる。高速チューニングモードでは、アクティブチャネル近くの周波数が検出され、ファイン・チューニングモードでは、チャネル周波数が識別される。基本的な考えによれば、ステージ３におけるフェーズロックループ３１から生じるロック信号は、チャネルがアクティブであるか否かに関する第一の指示を与えることができ、好ましくは、更に有利なことに、同期信号５４に基づいた第二の指示と組み合わせることができる。

59. 发明专利

JP3589178B2 Digital / analog television signal receiver 有权
公开(公告)号：JP3589178B2
公开(公告)日：2004-11-17
申请号：JP2000362479
申请日：2000-11-29
申请人：船井電機株式会社
发明人：丈洋小野松
IPC分类号： H03J7/22 , H04B1/16 , H04N5/44 , H04N5/46
CPC分类号： H04N21/4383 , H04N5/4401 , H04N5/46

60. 发明专利

JP2002217768A COMMUNICATION EQUIPMENT AND CHANNEL SEARCH METHOD 失效
公开(公告)号：JP2002217768A
公开(公告)日：2002-08-02
申请号：JP2001013694
申请日：2001-01-22
申请人： KENWOOD CORP
发明人： YAMAKAWA JUN
IPC分类号： H03J7/22 , H04B1/26
摘要： PROBLEM TO BE SOLVED: To provide communication equipment that can quickly specify a channel suitable for communication. SOLUTION: A CPU 7 supplies prescribed frequency division ratio setting data to a PLL(phase locked loop) synthesizer 8 to set a reference frequency of the PLL synthesizer 8 being a local signal source to be the double of a channel step and the PLL synthesizer 8 locks channels at an interval of a channel. Then the CPU 7 reads the signal strength measured by a detector 4 from a memory 6. The CPU 7 specifies a channel with the highest signal strength among values of the read signal strength.

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