KR900011328A - Fm 스테레오 회로 - Google Patents
Fm 스테레오 회로 Download PDFInfo
- Publication number
- KR900011328A KR900011328A KR1019890018532A KR890018532A KR900011328A KR 900011328 A KR900011328 A KR 900011328A KR 1019890018532 A KR1019890018532 A KR 1019890018532A KR 890018532 A KR890018532 A KR 890018532A KR 900011328 A KR900011328 A KR 900011328A
- Authority
- KR
- South Korea
- Prior art keywords
- composite signal
- signals
- circuit
- channel
- differential amplifier
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
- H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
- H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems
-
- 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
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
- H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
- H04B1/1669—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal
- H04B1/1676—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal of the sum or difference signal
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에의한 FM 스테레오 회로용 분리조정회로를 포함하는 FM 디코더의 기능 불록 다이아그램, 제2도는 제1도의 제어 및 분리조정회로의 개략도이다.
Claims (4)
- 베이스밴드 L+R 채널내용을 가지는 제1복합신호와, 베이스밴드 L-R 채널 내용을 가지는 제2복합신호와, 복합신호로부터 다른 채널의 성분이 실질적으로 존재하지않는 각 채널신호를 가지는 좌, 우 채널신호를 분리하여 끌어내기위한 수단을 포함하는 FM 스테레오 회로에 있어서, 다른 복합신호에 대하여 일측복합신호의 이들을 증가하기위한 이득수단(24)과; 얻어진 좌, 우 채널이 다른 채널신호에 영향하지않도록 두 복합 신호의 신호강도를 등화하기위해 일측복합신호를 정적으로 감쇄하기 위한 감쇄수단(18, 20, 22);을 포함하는 분리조정수단을 특징으로 하는 FM 스테레오 회로.
- 제1항에 있어서, 다른 채널의 성분이 실질적으로 존재하지 않는 각 채널신호를 가지는 좌, 우 채널신호를 복합신호로부터 분리하여 끌어내기위한 매트릭스수단(16)과; 제2복합신호의 AC 성분을 동적으로 줄이기위한 혼합수단(20)을 포함하고, 제1복합신호에 대하여 제2복합신호의 이득을 증가하기위한 이득수단(24)과, 두복합신호의 신호강도를 등화하기위해 제2복합신호를 줄이며, 복합신호가 실질적으로 같아지게 제한하는 혼합수단의 범위를 제한하기위한 혼합수단(20) 및 조정회로(22)를 포함하는 감쇄수단을 특징으로하는 FM 스테레오회로.
- 제2항에 있어서, 혼합수단은 제2복합신호의 감쇄가 차동 증폭기 출력의 함수로 존재하는 일정기준전압입력과 혼합제어입력을 가지는 차동 증폭기(26)를 포함하고, 조정회로(22)는 제2복합신호의 최대값이 만들어지도록 소정의 최소감쇄값으로 출력을 바이어스하기위한 차동증폭기에 연결된 전압제어수단(54,60)을 포함하는 것을 특징으로하는 FM 스테레오 회로.
- 제3항에 있어서, 조정수단(22)은 차동증폭기의 다이내믹레인지를 제한할수 있도록, 그 출력의 최대전압을 낮추기위한 차동증폭기(26)의 한출력과 그라운드 사이에 직렬로 연결된 트랜지스터(58) 및 저항(60)을 포함하고, 상기 트랜지스터(58)는 전압으로 제어되는 제어단자와 제어단자에 제어전압을 가변적으로 공급하기위한 수단(54,36)을 가지는 것을 특징으로하는 FM 스테레오 회로.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US284,882 | 1988-12-15 | ||
US07/284,882 US4959859A (en) | 1988-12-15 | 1988-12-15 | FM Channel separation adjustment |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900011328A true KR900011328A (ko) | 1990-07-11 |
KR920010105B1 KR920010105B1 (ko) | 1992-11-14 |
Family
ID=23091874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890018532A KR920010105B1 (ko) | 1988-12-15 | 1989-12-14 | Fm 스테레오 회로 |
Country Status (5)
Country | Link |
---|---|
US (1) | US4959859A (ko) |
EP (1) | EP0373760B1 (ko) |
JP (1) | JPH02215240A (ko) |
KR (1) | KR920010105B1 (ko) |
DE (1) | DE68915409T2 (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5113446A (en) * | 1990-12-17 | 1992-05-12 | Ford Motor Company | Stereo blend controller for FM receivers |
JPH0537478A (ja) * | 1991-07-31 | 1993-02-12 | Fujitsu Ten Ltd | 音場制御装置 |
ES2165386T3 (es) * | 1993-03-24 | 2002-03-16 | Blaupunkt Werke Gmbh | Receptor de radio con procesamiento digital de las señales. |
JP3891896B2 (ja) * | 2002-07-12 | 2007-03-14 | 株式会社豊田自動織機 | セパレーション調整回路 |
GB2419265B (en) * | 2004-10-18 | 2009-03-11 | Wolfson Ltd | Improved audio processing |
US20090232316A1 (en) * | 2008-03-14 | 2009-09-17 | Chieh-Hung Chen | Multi-channel blend system for calibrating separation ratio between channel output signals and method thereof |
US8094836B2 (en) * | 2008-04-08 | 2012-01-10 | Mediatek Inc. | Multi-channel decoding systems capable of reducing noise and methods thereof |
US8259960B2 (en) * | 2009-09-11 | 2012-09-04 | BSG Laboratory, LLC | Phase layering apparatus and method for a complete audio signal |
US10630328B2 (en) * | 2018-08-08 | 2020-04-21 | Qualcomm Incorporated | Current-mode filtering using current steering |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5333002B2 (ko) * | 1972-09-13 | 1978-09-12 | ||
DE2511098C2 (de) * | 1975-03-13 | 1983-01-05 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Decodierung eines frequenzmodulierten Stereo-Rundfunksignals |
JPS5646346A (en) * | 1979-09-21 | 1981-04-27 | Hitachi Ltd | Control system for fm stereo demodulation |
JPS56157149A (en) * | 1980-05-08 | 1981-12-04 | Rohm Co Ltd | Stereo separation control device for fm tuner |
JPS5769949A (en) * | 1980-10-20 | 1982-04-30 | Matsushita Electric Ind Co Ltd | Stereo signal reproducing circuit |
NL8104156A (nl) * | 1981-09-08 | 1983-04-05 | Philips Nv | Inrichting voor de ontvangst van tv-signalen met linker en rechter stereophone geluidssignalen. |
JPS6281138A (ja) * | 1985-09-27 | 1987-04-14 | スプラグ・エレクトリツク・カンパニ− | 混合形ステレオデコ−ダ |
US4748669A (en) * | 1986-03-27 | 1988-05-31 | Hughes Aircraft Company | Stereo enhancement system |
US4916741A (en) * | 1987-03-27 | 1990-04-10 | Sanyo Electric Co., Ltd. | FM/FMX stereophonic receiver |
US4841572A (en) * | 1988-03-14 | 1989-06-20 | Hughes Aircraft Company | Stereo synthesizer |
-
1988
- 1988-12-15 US US07/284,882 patent/US4959859A/en not_active Expired - Lifetime
-
1989
- 1989-11-02 DE DE68915409T patent/DE68915409T2/de not_active Expired - Fee Related
- 1989-11-02 EP EP89311363A patent/EP0373760B1/en not_active Expired - Lifetime
- 1989-12-12 JP JP1322456A patent/JPH02215240A/ja active Pending
- 1989-12-14 KR KR1019890018532A patent/KR920010105B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR920010105B1 (ko) | 1992-11-14 |
DE68915409T2 (de) | 1994-09-01 |
EP0373760A2 (en) | 1990-06-20 |
DE68915409D1 (de) | 1994-06-23 |
JPH02215240A (ja) | 1990-08-28 |
EP0373760B1 (en) | 1994-05-18 |
EP0373760A3 (en) | 1991-10-09 |
US4959859A (en) | 1990-09-25 |
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Legal Events
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---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
LAPS | Lapse due to unpaid annual fee |