KR870001910B1 - 다중챈널방송수신기의 하이패스/로우패스 절환필터 - Google Patents
다중챈널방송수신기의 하이패스/로우패스 절환필터 Download PDFInfo
- Publication number
- KR870001910B1 KR870001910B1 KR1019850003791A KR850003791A KR870001910B1 KR 870001910 B1 KR870001910 B1 KR 870001910B1 KR 1019850003791 A KR1019850003791 A KR 1019850003791A KR 850003791 A KR850003791 A KR 850003791A KR 870001910 B1 KR870001910 B1 KR 870001910B1
- Authority
- KR
- South Korea
- Prior art keywords
- pass filter
- frequency
- low
- capacitor
- pass
- Prior art date
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1758—Series LC in shunt or branch path
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
- H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
- H04N7/104—Switchers or splitters
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Filters And Equalizers (AREA)
- Noise Elimination (AREA)
Abstract
Description
Claims (1)
- 바이어스전압(VT)에 따라 용량값이 변화되는 바랙터다이오드(VD11)(VD12)를 포함하여 인덕터(L11∼L17)와 콘덴서(C11∼C15)로 구성되는 하이패스/로우패스필터와, 직병렬의 다이오드(D13)(D14)와 저항(R11) 및 콘덴서(C16)로 구성되어 고역동작신호(SH)에 따라 상기 하이패스/로우패스필터를 하이패스필터로 절환시키는 하이패스필터제어부, 직병렬의 다이오드(D11)(D12)(D15)(D16)와 저항(R14) 및 콘덴서(C18)로 구성되어 저역동작신호에 따라 상기 하이패스/로우패스필터를 로우패스필터로 절환시키면서 인덕터의 용량을 제어하는 로우패스필터제어부, 저항(R12)(R13)과 콘덴서(C17)로 구성되어 입력되는 챈널의 주파수에 따라 변화되는 바이어스전압(VT)으로 상기 바랙터다이오드(VD11)(VD12)의 정전용량을 가변시켜서 대역폭을 조정시키는 통과대역조정부 등을 구비하여 구성된 다중챈널방송수신기의 하이패스/로우패스절환필터.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019850003791A KR870001910B1 (ko) | 1985-05-31 | 1985-05-31 | 다중챈널방송수신기의 하이패스/로우패스 절환필터 |
US06/869,385 US4731877A (en) | 1985-05-31 | 1986-05-29 | Tunable lowpass-highpass switching filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019850003791A KR870001910B1 (ko) | 1985-05-31 | 1985-05-31 | 다중챈널방송수신기의 하이패스/로우패스 절환필터 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR860009547A KR860009547A (ko) | 1986-12-23 |
KR870001910B1 true KR870001910B1 (ko) | 1987-10-21 |
Family
ID=19241179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019850003791A KR870001910B1 (ko) | 1985-05-31 | 1985-05-31 | 다중챈널방송수신기의 하이패스/로우패스 절환필터 |
Country Status (2)
Country | Link |
---|---|
US (1) | US4731877A (ko) |
KR (1) | KR870001910B1 (ko) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6354883A (ja) * | 1986-08-25 | 1988-03-09 | Dx Antenna Co Ltd | ヘッドエンド用変調装置 |
JPH01168125A (ja) * | 1987-12-23 | 1989-07-03 | Matsushita Electric Ind Co Ltd | テレビジョンチューナ |
JPH0243822A (ja) * | 1988-08-03 | 1990-02-14 | Toshiba Corp | テレビジョンチューナ |
GB2223896A (en) * | 1988-10-12 | 1990-04-18 | Philips Electronic Associated | Radio receivers |
NL8901460A (nl) * | 1989-06-08 | 1991-01-02 | Philips Nv | Ontvanger voor terrestriele am- en satelliet fm-tv-omroepsignalen. |
FR2745131A1 (fr) * | 1996-02-21 | 1997-08-22 | Philips Electronics Nv | Appareil de radio-telephonie multimode |
JPH09321544A (ja) * | 1996-05-29 | 1997-12-12 | Dx Antenna Co Ltd | 衛星信号受信アンテナ用コンバータ |
JP3462351B2 (ja) * | 1996-08-30 | 2003-11-05 | テルモ株式会社 | 超音波診断装置 |
US6054908A (en) * | 1997-12-12 | 2000-04-25 | Trw Inc. | Variable bandwidth filter |
GB9916901D0 (en) * | 1999-07-19 | 1999-09-22 | Cambridge Silicon Radio Ltd | Adjustable filter |
JP3600075B2 (ja) * | 1999-07-29 | 2004-12-08 | アルプス電気株式会社 | テレビジョンチューナ |
JP2001223954A (ja) | 2000-02-10 | 2001-08-17 | Alps Electric Co Ltd | テレビジョンチューナの入力回路 |
US6895190B1 (en) * | 2000-05-26 | 2005-05-17 | Picolight, Incorporated | Switchable bandwidth lowpass filter |
JP2003158437A (ja) * | 2001-09-06 | 2003-05-30 | Murata Mfg Co Ltd | Lcフィルタ回路、積層型lcフィルタ、マルチプレクサおよび無線通信装置 |
US20030218697A1 (en) * | 2002-05-02 | 2003-11-27 | J. Kovacic Stephen | Broadband television tuner front end |
US6999742B2 (en) * | 2002-07-26 | 2006-02-14 | Mitsubishi Electric Research Laboratories, Inc. | By-passing adjacent channel interference removal in receivers |
JP3915674B2 (ja) * | 2002-11-20 | 2007-05-16 | 松下電器産業株式会社 | 整合器 |
CN1799203B (zh) * | 2003-06-04 | 2010-12-01 | Nxp股份有限公司 | 用于零if接收机的自适应互调失真滤波器 |
JP2007110685A (ja) * | 2005-09-16 | 2007-04-26 | Oki Electric Ind Co Ltd | 受信装置およびその妨害信号減衰方法 |
DE102005056486A1 (de) * | 2005-11-20 | 2007-05-31 | Atmel Germany Gmbh | Eingangsfilter zur Spiegelfrequenzunterdrückung |
US7880681B2 (en) * | 2008-02-26 | 2011-02-01 | Navcom Technology, Inc. | Antenna with dual band lumped element impedance matching |
US8466837B2 (en) * | 2008-12-31 | 2013-06-18 | Navcom Technology Inc. | Hooked turnstile antenna for navigation and communication |
GB2491238B (en) * | 2012-05-15 | 2013-07-03 | Renesas Mobile Corp | Filter circuitry |
CN103986434A (zh) * | 2014-04-15 | 2014-08-13 | 中国电子科技集团公司第五十五研究所 | 集总参数微型ltcc高通滤波器 |
US9787278B1 (en) * | 2016-09-26 | 2017-10-10 | International Business Machines Corporation | Lossless microwave switch based on tunable filters for quantum information processing |
RU187262U1 (ru) * | 2018-09-03 | 2019-02-27 | Акционерное общество "Концерн "Созвездие" | Преселектор коротковолнового диапазона |
RU187246U1 (ru) * | 2018-10-29 | 2019-02-26 | Акционерное общество "Концерн "Созвездие" | Переключаемый преселектор коротковолнового диапазона |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2828838C2 (de) * | 1977-07-01 | 1983-10-20 | Hitachi, Ltd., Tokyo | HF-Eingangsschaltung für Fernsehempfänger |
US4361909A (en) * | 1980-05-30 | 1982-11-30 | Rca Corporation | Pre-tuner tracking traps responsive to a tuning voltage |
US4480338A (en) * | 1982-03-01 | 1984-10-30 | Zenith Electronics Corporation | Lowpass-highpass electronic switch |
-
1985
- 1985-05-31 KR KR1019850003791A patent/KR870001910B1/ko not_active IP Right Cessation
-
1986
- 1986-05-29 US US06/869,385 patent/US4731877A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR860009547A (ko) | 1986-12-23 |
US4731877A (en) | 1988-03-15 |
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Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19850531 |
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Comment text: Decision on Publication of Application Patent event code: PG16051S01I Patent event date: 19870923 |
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