BR8807465A - Dispositivo para filtragem de um sinal de recepca de ondas ultracurtas fm - Google Patents
Dispositivo para filtragem de um sinal de recepca de ondas ultracurtas fmInfo
- Publication number
- BR8807465A BR8807465A BR888807465A BR8807465A BR8807465A BR 8807465 A BR8807465 A BR 8807465A BR 888807465 A BR888807465 A BR 888807465A BR 8807465 A BR8807465 A BR 8807465A BR 8807465 A BR8807465 A BR 8807465A
- Authority
- BR
- Brazil
- Prior art keywords
- pct
- ultracutted
- recepca
- sign
- waves
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
- H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
- H03D3/005—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling a bandpass filter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
- Stereo-Broadcasting Methods (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3712736 | 1987-04-15 | ||
DE19873724604 DE3724604A1 (de) | 1987-04-15 | 1987-07-24 | Anordnung zum filtern eines fm-ukw-empfangssignals |
PCT/DE1988/000235 WO1988008222A1 (en) | 1987-04-15 | 1988-04-15 | Arrangement for filtering an incoming fm-uhf signal |
Publications (1)
Publication Number | Publication Date |
---|---|
BR8807465A true BR8807465A (pt) | 1990-05-22 |
Family
ID=25854670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR888807465A BR8807465A (pt) | 1987-04-15 | 1988-04-15 | Dispositivo para filtragem de um sinal de recepca de ondas ultracurtas fm |
Country Status (13)
Country | Link |
---|---|
US (2) | US5155862A (pt) |
EP (2) | EP0357632B1 (pt) |
JP (2) | JPH02503974A (pt) |
KR (1) | KR890700963A (pt) |
CN (1) | CN88102082A (pt) |
AT (1) | ATE115788T1 (pt) |
AU (1) | AU1579988A (pt) |
BR (1) | BR8807465A (pt) |
DE (3) | DE3724604A1 (pt) |
IL (1) | IL86055A (pt) |
MY (1) | MY103727A (pt) |
PT (1) | PT87253B (pt) |
WO (2) | WO1988008222A1 (pt) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3818750A1 (de) * | 1988-05-30 | 1989-12-14 | H U C Elektronik Gmbh | Fm-empfangsteil |
DE3818751A1 (de) * | 1988-05-30 | 1989-12-07 | H U C Elektronik Gmbh | Fm-empfangsteil |
DE3818753A1 (de) * | 1988-05-30 | 1989-12-21 | H U C Elektronik Gmbh | Fm-empfangsteil |
DE3818749A1 (de) * | 1988-05-30 | 1989-12-21 | H U C Elektronik Gmbh | Fm-empfangsteil |
DE3818752A1 (de) * | 1988-05-30 | 1989-12-07 | H U C Elektronik Gmbh | Fm-empfangsteil |
DE3818748A1 (de) * | 1988-05-30 | 1989-12-21 | H U C Elektronik Gmbh | Fm-empfangsteil |
US5287556A (en) * | 1990-09-28 | 1994-02-15 | Motorola, Inc. | Interference reduction using an adaptive receiver filter, signal strength, and BER sensing |
TW228043B (pt) * | 1992-06-26 | 1994-08-11 | Philips Electronics Nv | |
TW274665B (pt) * | 1992-06-26 | 1996-04-21 | Philips Electronics Nv | |
TW263640B (pt) * | 1992-06-26 | 1995-11-21 | Philips Electronics Nv | |
GB2270223B (en) * | 1992-08-29 | 1996-06-19 | Motorola Israel Ltd | A communications system |
DE4239759C2 (de) * | 1992-11-26 | 2001-08-16 | Atmel Germany Gmbh | Verfahren zum Umschalten auf eine empfangswürdige Alternativfrequenz eines RDS-Empfängers |
DE69303348T2 (de) * | 1992-11-27 | 1996-10-24 | Clarion Co Ltd | RDS-Rundfunkempfänger |
DE4324603A1 (de) * | 1993-07-22 | 1995-01-26 | Becker Gmbh | IF-Filteranorndung in einem Empfänger für FM-Empfangssignale |
US5668837A (en) * | 1993-10-14 | 1997-09-16 | Ericsson Inc. | Dual-mode radio receiver for receiving narrowband and wideband signals |
GB2288936B (en) * | 1993-10-14 | 1997-09-24 | Ericsson Ge Mobile Communicat | Adaptive bandwidth receiver |
US5465410A (en) * | 1994-11-22 | 1995-11-07 | Motorola, Inc. | Method and apparatus for automatic frequency and bandwidth control |
US5757684A (en) * | 1995-11-17 | 1998-05-26 | Rincon Research Corporation | Adaptive co-channel interference canceler using spectral symmetry |
DE19546406C1 (de) * | 1995-12-12 | 1997-05-22 | Becker Gmbh | Filteranordnung für einen FM-Empfänger |
US5949832A (en) * | 1996-03-26 | 1999-09-07 | Sicom, Inc. | Digital receiver with tunable analog filter and method therefor |
JP3831977B2 (ja) * | 1996-05-24 | 2006-10-11 | ソニー株式会社 | 等価可変抵抗回路 |
US6633550B1 (en) | 1997-02-20 | 2003-10-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio transceiver on a chip |
US6058148A (en) * | 1997-06-27 | 2000-05-02 | Ford Motor Company | Digital processing radio receiver with adaptive bandwidth control |
US6178314B1 (en) | 1997-06-27 | 2001-01-23 | Visteon Global Technologies, Inc. | Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections |
US6295324B1 (en) | 1997-12-10 | 2001-09-25 | Visteon Global Technologies, Inc. | Signal quality measurement using full-complex FM detector |
US6393450B1 (en) | 1999-08-25 | 2002-05-21 | Visteon Global Technologies, Inc. | Switched bandwidth digital filters with slewing |
US6445735B1 (en) | 1999-02-08 | 2002-09-03 | Visteon Global Technologies, Inc. | Switched bandwidth digital filters with reduced transients during switching |
US6694131B1 (en) | 2001-02-21 | 2004-02-17 | Mitsubishi Electric Corporation | Method and apparatus for adaptive image rejection |
GB2394847B (en) * | 2002-11-02 | 2005-09-07 | Zarlink Semiconductor Ltd | Digital receiver |
US7092465B2 (en) * | 2002-11-14 | 2006-08-15 | Freescale Semiconductor, Inc. | Method and apparatus for processing an amplitude modulated (AM) signal |
US7440760B2 (en) * | 2003-03-31 | 2008-10-21 | Lucent Technologies Inc. | Methods and apparatus for allocating bandwidth to communication devices based on signal conditions experienced by the communication devices |
US7761067B1 (en) | 2003-05-15 | 2010-07-20 | Marvell International Ltd. | Iterative filter circuit calibration |
US6968164B2 (en) * | 2003-05-19 | 2005-11-22 | Visteon Global Technologies, Inc. | Method of controlling filter bandwidth in a radio receiver for a duplicative broadcast signal |
JP4263123B2 (ja) * | 2004-03-23 | 2009-05-13 | 三洋電機株式会社 | 信号処理回路 |
US7272375B2 (en) | 2004-06-30 | 2007-09-18 | Silicon Laboratories Inc. | Integrated low-IF terrestrial audio broadcast receiver and associated method |
JP4208864B2 (ja) * | 2005-06-30 | 2009-01-14 | 日本テキサス・インスツルメンツ株式会社 | チューナー用半導体装置及びダイバーシティ受信機 |
US7729679B1 (en) | 2006-06-09 | 2010-06-01 | Marvell International Ltd. | Dynamic bandwidth filter for an FM receiver |
US8131247B2 (en) * | 2009-05-20 | 2012-03-06 | Broadcom Corporation | Method and system for an intermediate frequency (IF) channel select filter with an integrated alternate adjacent channel interference (AACI) filter |
CN103888101A (zh) * | 2014-04-04 | 2014-06-25 | 武汉凡谷电子技术股份有限公司 | 一种滤波器纹波及群时延波动补偿方法 |
US9455853B2 (en) * | 2014-12-30 | 2016-09-27 | Stmicroelectronics, Inc. | Device and method for FM demodulation with threshold extension |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL67099C (pt) * | 1940-06-29 | |||
GB903401A (en) | 1957-12-12 | 1962-08-15 | Borg Warner | Fuel injection pump |
US2927997A (en) | 1959-01-08 | 1960-03-08 | James R Day | Frequency modulation receiver |
US3541451A (en) * | 1967-12-26 | 1970-11-17 | Magnavox Co | Variable center frequency filter for frequency modulation receiver |
US4081771A (en) * | 1976-12-06 | 1978-03-28 | Zenith Radio Corporation | 82 Detent manual varactor tuning system |
US4356567A (en) * | 1977-06-28 | 1982-10-26 | Pioneer Electronic Corporation | Radio receiver with bandwidth switching |
US4352208A (en) * | 1980-03-04 | 1982-09-28 | Motorola, Inc. | Automatic IF selectivity for radio receiver system |
US4385402A (en) * | 1980-04-16 | 1983-05-24 | Redifon Telecommunications Limited | Switchable filter circuits |
FR2490427B1 (fr) * | 1980-09-16 | 1986-04-18 | Thomson Csf | Demodulateur d'un signal module en frequence et systeme de television comportant un tel demodulateur |
DE3048263A1 (de) * | 1980-12-20 | 1982-07-29 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Rundfunkempfangsgeraet |
WO1983000973A1 (fr) * | 1981-08-31 | 1983-03-17 | Ohta, Tomozo | Systeme demodulateur fm de sensibilite elevee |
DE3137843A1 (de) * | 1981-09-23 | 1983-03-31 | Robert Bosch Gmbh, 7000 Stuttgart | Filter- und demodulationsschaltung |
US4406019A (en) * | 1981-11-16 | 1983-09-20 | The Bendix Corporation | Selectivity means in amplitude modulated radio receivers |
DE3147493C2 (de) * | 1981-12-01 | 1986-04-03 | Robert Bosch Gmbh, 7000 Stuttgart | Filter- und Demodulationsschaltung |
CA1196966A (en) * | 1982-03-23 | 1985-11-19 | Kouzou Kage | Interference wave detection circuit for use in radio receiver |
JPS59185433A (ja) * | 1983-04-06 | 1984-10-22 | Trio Kenwood Corp | Am受信機 |
JPS6172418A (ja) * | 1984-09-17 | 1986-04-14 | Alps Electric Co Ltd | 衛星放送用受信機 |
DE3438286A1 (de) * | 1984-10-16 | 1986-04-17 | Hansen/Catito Elektronik, 1000 Berlin | Verfahren und schaltungsanordnung zum umsetzen frequenzmodulierter signale ueber mindestens eine zwischenfrequenz in niederfrequenzsignale |
-
1987
- 1987-07-24 DE DE19873724604 patent/DE3724604A1/de not_active Withdrawn
-
1988
- 1988-04-13 IL IL86055A patent/IL86055A/xx unknown
- 1988-04-13 MY MYPI88000368A patent/MY103727A/en unknown
- 1988-04-15 PT PT87253A patent/PT87253B/pt not_active IP Right Cessation
- 1988-04-15 AT AT88903180T patent/ATE115788T1/de active
- 1988-04-15 US US07/427,850 patent/US5155862A/en not_active Expired - Fee Related
- 1988-04-15 AU AU15799/88A patent/AU1579988A/en not_active Abandoned
- 1988-04-15 WO PCT/DE1988/000235 patent/WO1988008222A1/de not_active Application Discontinuation
- 1988-04-15 JP JP63503022A patent/JPH02503974A/ja active Pending
- 1988-04-15 DE DE3852486T patent/DE3852486D1/de not_active Expired - Fee Related
- 1988-04-15 EP EP88903179A patent/EP0357632B1/de not_active Revoked
- 1988-04-15 WO PCT/DE1988/000236 patent/WO1988008223A1/de not_active Application Discontinuation
- 1988-04-15 BR BR888807465A patent/BR8807465A/pt unknown
- 1988-04-15 DE DE88903179T patent/DE3886531D1/de not_active Expired - Fee Related
- 1988-04-15 CN CN198888102082A patent/CN88102082A/zh active Pending
- 1988-04-15 JP JP63503021A patent/JPH02503137A/ja active Pending
- 1988-04-15 EP EP88903180A patent/EP0358649B1/de not_active Revoked
- 1988-04-15 US US07/427,844 patent/US5159709A/en not_active Expired - Fee Related
- 1988-12-15 KR KR1019880701667A patent/KR890700963A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0357632B1 (de) | 1993-12-22 |
DE3886531D1 (de) | 1994-02-03 |
DE3724604A1 (de) | 1988-12-01 |
EP0358649A1 (de) | 1990-03-21 |
WO1988008222A1 (en) | 1988-10-20 |
JPH02503137A (ja) | 1990-09-27 |
CN88102082A (zh) | 1988-12-21 |
WO1988008223A1 (en) | 1988-10-20 |
MY103727A (en) | 1993-09-30 |
AU1579988A (en) | 1988-11-04 |
DE3852486D1 (de) | 1995-01-26 |
ATE115788T1 (de) | 1994-12-15 |
PT87253B (pt) | 1993-09-30 |
IL86055A (en) | 1992-11-15 |
US5155862A (en) | 1992-10-13 |
IL86055A0 (en) | 1988-09-30 |
KR890700963A (ko) | 1989-04-28 |
PT87253A (pt) | 1989-05-12 |
EP0358649B1 (de) | 1994-12-14 |
EP0357632A1 (de) | 1990-03-14 |
US5159709A (en) | 1992-10-27 |
JPH02503974A (ja) | 1990-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BR8807465A (pt) | Dispositivo para filtragem de um sinal de recepca de ondas ultracurtas fm | |
ES2115514A1 (es) | Metodo y aparato para identificar canales de señalizacion. | |
EP0235662A3 (en) | Optical transmitter comprising an optical frequency discriminator | |
AU687156B2 (en) | Process and device for detecting vital functions in living bodies | |
AU3816889A (en) | Radio communication apparatus having an improved signal to noise ratio | |
DE69005905D1 (de) | Empfänger für terrestrische AM- und Satelliten-FM-Fernsehsignale. | |
EP0893887A3 (en) | Dual band radio communication apparatus | |
GR3015073T3 (en) | Method and apparatus for information transmission between radio transceivers of the same frequency hopping network. | |
EP0810746A3 (en) | Transmission apparatus using a multi-carrier signal with allocation of subcarriers | |
NO175128C (no) | Frekvenslåsekrets (AFC) for mottaker | |
SG44868A1 (en) | Fm receiver with dynamic intermediate frequency (if) filter tuning | |
DE3468598D1 (en) | Digital sub-band filters | |
ES533428A0 (es) | Receptor de radio para recibir senales moduladas en frecuencia en una senal portadora de alta frecuencia. | |
WO1998038769A3 (en) | Frame alignment of test signals in a communication system | |
EP0383300A3 (en) | LC-type dielectric filter | |
FR2599860B1 (fr) | Procede et dispositif pour la detection acoustique passive d'aeronefs, notamment d'helicopteres | |
EP0378301A3 (en) | Transmitter/receiver apparatus | |
EP0413934A3 (en) | Transmission line frequency equalizer | |
CA2127079A1 (en) | Antenna Apparatus Having Individual Transmitting and Receiving Antenna Elements for Different Frequencies | |
AU584819B2 (en) | An antenna exciter for at least two different frequency bands | |
CA2124878A1 (en) | Intermediate frequency receiver apparatus | |
MY130499A (en) | Radio receiver | |
DE69024981D1 (de) | Schaltung zur Wellenformung und Empfänger, der diese Schaltung benutzt | |
DE69025293D1 (de) | Kombinier-/Sortiergerät für Radiofrequenzsignale | |
CA2055309A1 (en) | Apparatus for the optical heterodyne reception of signals |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
KD | Notifcation of receipt (letter patent) | ||
FA4 | Application deemed withdrawn (art. 21(1)) |