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1. 发明专利

JP2005524274A Tuner input filter having an electronic adjustable center frequency to adapt to the antenna characteristics 审中-公开
公开(公告)号：JP2005524274A
公开(公告)日：2005-08-11
申请号：JP2004500407
申请日：2003-04-25
申请人：トムソンライセンシングソシエテアノニムThomson Licensing S.A.
发明人：ピューゲル，マイケル，アンソニー , ラマスワミー，クマール
IPC分类号： H03J3/22 , H03J1/00 , H03J3/18 , H03J3/20 , H04B1/18 , H04N5/33 , H04N5/50 , H04N5/52
CPC分类号： H04N5/50 , H03J1/0066 , H03J3/185 , H03J3/20 , H03J2200/28 , H04N5/52 , H04N21/4383 , H04N21/44209
摘要：システム、装置、および／または方法は、ＲＦチューナへのＲＦ信号を受信するアンテナシステムのインピーダンスに基づき、ＲＦチューナのＲＦ入力フィルタの周波数応答調整をする。周波数応答調整は、好ましくは動的におよび／または書くチューニングされた周波数に関して達成される。特に、本システム、システム、および／または装置は、インピーダンスに合わせて設計されていないアンテナ入力におけるアンテナシステムインピーダンスによりＲＦチューナで生じたミスチューニング効果をＲＦチューナレベルで補償する。ＲＦチューナのＲＦ入力フィルタの周波数応答は、チューニング周波数の１以上の測定されたパラメータに基づき独立または準独立な制御電圧信号で電子的に調整可能である。周波数応答調整は、ＲＦ入力フィルタバンドパス周波数レンジの中心周波数の調整と、および／またはＲＦ入力フィルタのバンドパス周波数の変更を含んでもよい。本発明は、ＲＦ信号レシーバ、特に電子的アライメントタイプのチューナで少なくとも１つの電子的調整可能ＲＦフィルタを用いるものの能力を拡張する。

2. 发明专利

JP3177437B2 失效
公开(公告)号：JP3177437B2
公开(公告)日：2001-06-18
申请号：JP6843296
申请日：1996-03-25
IPC分类号： H04N5/50 , H03H7/01 , H03J3/22 , H04B1/26 , H04N5/44

3. 发明专利

JP2988106B2 失效
公开(公告)号：JP2988106B2
公开(公告)日：1999-12-06
申请号：JP4618792
申请日：1992-01-31
申请人： NIPPON DENKI KK
发明人： DOMON WATARU , SHIBUYA MAKOTO
IPC分类号： G01S7/48 , H01L31/10 , H03J3/22 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28

4. 发明专利

JPH104336A TUNING CIRCUIT 失效
公开(公告)号：JPH104336A
公开(公告)日：1998-01-06
申请号：JP17581396
申请日：1996-06-14
申请人： IKEDA TAKESHI
发明人： OKAMOTO AKIRA
IPC分类号： H03F3/191 , H03H11/12 , H03J3/02 , H03J3/22 , H03J7/02
摘要： PROBLEM TO BE SOLVED: To provide the tuning circuit suitable for circuit integration because no variable capacitor is required. SOLUTION: The tuning circuit 1 is made up of two phase shift circuits 10L, 30C which shift a phase by 360 deg. in total at a prescribed frequency, a voltage division circuit 160 consisting of resistors 162, 164 and provided to an output side of the post-stage phase shift circuit 30C, a feedback resistor 70 feeding back an output of the voltage division circuit 160 to an input of the pre-stage phase shift circuit 10L, and a variable resistor 74 to branch part of a signal fed back via the feedback resistor 70. An antenna coil of an AM receiver is employed for an inductor 17 in the pre-stage phase shift circuit 10L. Various reception signals such as broadcast waves are received directly by the tuning circuit. A variable capacitor having been indispensable to a conventional tuning circuit is not required for this tuning circuit.

5. 发明专利

JPH06215955A ELECTRONIC TUNING/MATCHING CIRCUIT EMPLOYING VARIABLE INDUCTIVE DEVICE AND TUNING TANK CIRCUIT 失效
公开(公告)号：JPH06215955A
公开(公告)日：1994-08-05
申请号：JP28266393
申请日：1993-11-11
申请人： APPLIED MATERIALS INC
发明人： KENISU ESU KORINZU , JIYON TOROU , KUREIGU EI ROODERITSUKU , JIEI DEII PINSON ZA SEKANDO , DAGURASU EI BATSUKUBAAGAA ZA S , ROBAATO POORU HAATORAAJI , BUIKUTAA SHIERU
IPC分类号： H01F21/02 , H01F29/14 , H01J37/32 , H01L21/311 , H03H7/38 , H03H7/40 , H03H11/30 , H03J3/22 , H05H1/46
摘要： PURPOSE: To provide an impedance-matching circuit for matching source impedance with load impedance. CONSTITUTION: A low-loss design of an impedance-matching circuit based on a parallel resonance LC tank circuit and adjustable inductive elements for the parallel tank circuit is disclosed. An example of the impedance-matching circuit that is applied to plasma treatment is also disclosed and a local impedance conversion circuit is used to improve power transfer to a plasma source antenna.

6. 实用新型

JPH043492Y2 失效
公开(公告)号：JPH043492Y2
公开(公告)日：1992-02-04
申请号：JP8883385
申请日：1985-06-14
IPC分类号： H01G5/38 , H03J3/22

7. 发明专利

JPH03190412A TELEVISION TUNER 失效
公开(公告)号：JPH03190412A
公开(公告)日：1991-08-20
申请号：JP33050889
申请日：1989-12-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OZAKI TETSUYA , SUZUKI MASAKAZU , MATSUSHITA SEIJI , IWASE AKIO , ARIYOSHI ISAO
IPC分类号： H03J3/08 , H03J3/22 , H03J5/24
摘要： PURPOSE:To prevent the deterioration in NF and selectivity of the circuit by connecting a low band use tuning coil between a low band matching coil and a high band matching coil, and connecting one terminal of a high band tuning coil to a connecting point between the high band matching coil and the low band tuning coil. CONSTITUTION:An intermediate frequency band of an inputted RF signal is attenuated by an IF filter 2 and the resulting signal is inputted to a connecting point between a low band matching coil 4 and a high band matching coil 5. The RF signal outputted from them is inputted across a low band tuning coil 8 of a next stage and one terminal of a high band tuning coil 10 and a tuning variable capacitor diode 15, after the RF signal of a desired channel is selected, the signal is amplified by an RF signal amplifier circuit 17 and sent to the next stage. Moreover, bias resistors 6, 7 of a switching diode are placed to a pre-stage of the matching coil with a low impedance. Thus, the deterioration in the NF and the selectivity due to damping of the tuning circuit is prevented.

8. 实用新型

JPS6079847U 失效
公开(公告)号：JPS6079847U
公开(公告)日：1985-06-03
申请号：JP17250383
申请日：1983-11-07
IPC分类号： H04B1/08 , H03J3/22

9. 实用新型

JPS606351U 失效
公开(公告)号：JPS606351U
公开(公告)日：1985-01-17
申请号：JP9866183
申请日：1983-06-24
IPC分类号： H04B1/08 , H03J3/22

10. 发明专利

JPS5870617A UHF ELECTRONIC TUNER 失效
公开(公告)号：JPS5870617A
公开(公告)日：1983-04-27
申请号：JP16866981
申请日：1981-10-23
申请人： HITACHI LTD
发明人： ASABA YOUJI , KANAI FUMIO , SHINAGAWA MITSUHISA
IPC分类号： H03J3/22 , H03J3/28 , H03J3/30
摘要： PURPOSE:To obtain an excellent tracking, by using a 1/2lambda resonance circuit for a local oscillation circuit of a UHF tuner using a varactor diode, and using a two-point tuning circuit for a high frequency tuning circuit, and providing a parallel resonance coil for a tuning diode. CONSTITUTION:A 1/2lambda resonance circuit is used as a local oscillation circuit, and a two-point tuning circuit is employed for a high frequency tuning circuit. The frequency adjustment in the 13 CH of the high frequency tuning circuit is done with a resonance coil 9 and that in the 62 CH is performed with a resonance coil 23. The parallel resonance frequency satisfies Formula, where L1 is the inductance of the coil 9, Cs is a series additional capacitor 8, Cp is the parallel added capacitor 24 and L2 is the inductance of the coil 23. The amount of change in frequencies when the capacitor cs is changed is larger at lower frequencies and smaller at higher frequencies the same as the 1/2 resonance circuit and in actual adjustment, the capacitor Cp1 is changed by changing the inductance of the coil L2.

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