DE3034937C2 - Schaltung zur automatischen Rauschunterdrückung in einem FM-Empfänger - Google Patents
Schaltung zur automatischen Rauschunterdrückung in einem FM-EmpfängerInfo
- Publication number
- DE3034937C2 DE3034937C2 DE3034937A DE3034937A DE3034937C2 DE 3034937 C2 DE3034937 C2 DE 3034937C2 DE 3034937 A DE3034937 A DE 3034937A DE 3034937 A DE3034937 A DE 3034937A DE 3034937 C2 DE3034937 C2 DE 3034937C2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- circuit
- receiver
- field strength
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000001629 suppression Effects 0.000 title claims description 10
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000013016 damping Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 claims 2
- 230000003321 amplification Effects 0.000 claims 1
- 230000002238 attenuated effect Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 1
Classifications
-
- 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
- H04B1/1684—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 decoded left or right stereo channel
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/18—Automatic control in untuned amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979126993U JPS5646352U (US06653308-20031125-C00199.png) | 1979-09-17 | 1979-09-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3034937A1 DE3034937A1 (de) | 1981-04-09 |
DE3034937C2 true DE3034937C2 (de) | 1986-09-11 |
Family
ID=14948995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3034937A Expired DE3034937C2 (de) | 1979-09-17 | 1980-09-16 | Schaltung zur automatischen Rauschunterdrückung in einem FM-Empfänger |
Country Status (3)
Country | Link |
---|---|
US (1) | US4379207A (US06653308-20031125-C00199.png) |
JP (1) | JPS5646352U (US06653308-20031125-C00199.png) |
DE (1) | DE3034937C2 (US06653308-20031125-C00199.png) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4457012A (en) * | 1982-06-03 | 1984-06-26 | Carver R W | FM Stereo apparatus and method |
NL8203384A (nl) * | 1982-08-31 | 1984-03-16 | Philips Nv | Fm-stereo-ontvanger. |
US4574389A (en) * | 1983-07-15 | 1986-03-04 | Larry Schotz | Stereophonic receiver having a noise reduction control circuit |
ATE42876T1 (de) * | 1984-07-11 | 1989-05-15 | Siemens Ag | Schaltungsanordnung mit zwei miteinander entgegengesetzter polung an einen verbraucher anschliessbaren speiseschaltungen. |
JPS61257026A (ja) * | 1985-05-10 | 1986-11-14 | Pioneer Electronic Corp | 音声多重tvチユ−ナ |
JPH0669150B2 (ja) * | 1985-05-16 | 1994-08-31 | クラリオン株式会社 | Fm受信機 |
JPS621441U (US06653308-20031125-C00199.png) * | 1985-06-20 | 1987-01-07 | ||
US4761829A (en) * | 1985-11-27 | 1988-08-02 | Motorola Inc. | Adaptive signal strength and/or ambient noise driven audio shaping system |
ATE79495T1 (de) * | 1986-04-03 | 1992-08-15 | Motorola Inc | Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit ''raleigh''¨berblendung. |
US4792991A (en) * | 1986-04-03 | 1988-12-20 | Motorola, Inc. | FM receiver having improved audio quality in response to Rayleigh faded received signals |
MX161741A (es) * | 1987-08-28 | 1990-12-20 | Motorola Inc | Sistema mejorado de comunicaciones de frecuencia modulada |
US4901350A (en) * | 1989-04-20 | 1990-02-13 | Delco Electronics Corporation | Closed-loop audio attenuator |
DE4035672A1 (de) * | 1990-11-09 | 1992-05-14 | Audi Ag | Verfahren zum betreiben eines autoradios |
ES2165387T3 (es) * | 1993-03-24 | 2002-03-16 | Blaupunkt Werke Gmbh | Receptor de radio con procesamiento digital de las señales. |
US5412734A (en) * | 1993-09-13 | 1995-05-02 | Thomasson; Samuel L. | Apparatus and method for reducing acoustic feedback |
US5671286A (en) * | 1995-06-09 | 1997-09-23 | Ford Motor Company | Strategy for controlling FM stereo separation and frequency response in noisy reception environments |
DE19542737A1 (de) * | 1995-11-16 | 1997-05-22 | Bayerische Motoren Werke Ag | Schaltanordnung für mobile Rundfunkempfänger |
US20070004356A1 (en) * | 2002-12-16 | 2007-01-04 | Koninklijke Philips Electronics N.V. | Noise suppression in an fm receiver |
JP4916974B2 (ja) * | 2007-08-03 | 2012-04-18 | オンセミコンダクター・トレーディング・リミテッド | Fmチューナ |
JP2011188467A (ja) * | 2010-02-15 | 2011-09-22 | Fujitsu Ten Ltd | 放送受信装置及び、放送受信装置の雑音有無判断方法 |
JP2011199825A (ja) * | 2010-02-23 | 2011-10-06 | Fujitsu Ten Ltd | 放送受信装置及び、放送受信装置の雑音成分検出方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4037057A (en) * | 1974-08-01 | 1977-07-19 | Nippon Gakki Seizo Kabushiki Kaisha | Noise-cancelling apparatus for FM stereo receiver |
US3952161A (en) * | 1974-10-21 | 1976-04-20 | General Motors Corporation | Audio processor circuit for an FM-stereo radio receiver |
US4029906A (en) * | 1975-04-18 | 1977-06-14 | Sansui Electric Co., Ltd. | Automatic noise reduction system of FM stereo receiver |
JPS5528685A (en) * | 1978-08-23 | 1980-02-29 | Mitsubishi Electric Corp | Fm stereo radio receiver |
-
1979
- 1979-09-17 JP JP1979126993U patent/JPS5646352U/ja active Pending
-
1980
- 1980-09-16 US US06/187,712 patent/US4379207A/en not_active Expired - Lifetime
- 1980-09-16 DE DE3034937A patent/DE3034937C2/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3034937A1 (de) | 1981-04-09 |
JPS5646352U (US06653308-20031125-C00199.png) | 1981-04-25 |
US4379207A (en) | 1983-04-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8339 | Ceased/non-payment of the annual fee |