US1975055A
(en)
|
1929-03-25 |
1934-09-25 |
Rca Corp |
Television system
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US1878614A
(en)
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1931-02-24 |
1932-09-20 |
Hazeltine Corp |
Method of operating superheterodyne receivers
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US2014040A
(en)
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1932-11-14 |
1935-09-10 |
Sonoco Products Co |
Method of making cones and tubes
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US2220689A
(en)
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1934-01-26 |
1940-11-05 |
Rca Corp |
Oscillatory circuits
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US2140115A
(en)
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1937-06-10 |
1938-12-13 |
Rca Corp |
Superheterodyne receiver
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US2152515A
(en)
*
|
1937-06-18 |
1939-03-28 |
Hazeltine Corp |
Automatic signal interference control
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US2279177A
(en)
*
|
1939-12-04 |
1942-04-07 |
Plebanski Jozef |
Superheterodyne receiving system
|
NL67099C
(de)
*
|
1940-06-29 |
|
|
|
US2606285A
(en)
|
1942-11-23 |
1952-08-05 |
Fr Des Telecomm Soc |
Double heterodyne radio receiver
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US2404354A
(en)
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1943-06-16 |
1946-07-23 |
Tung Sol Lamp Works Inc |
Secret signaling system
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US2557329A
(en)
*
|
1945-10-06 |
1951-06-19 |
Honeywell Regulator Co |
Telautograph system
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US2658138A
(en)
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1945-12-01 |
1953-11-03 |
Hallicrafters Co |
Radio receiver
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US2588022A
(en)
*
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1947-11-28 |
1952-03-04 |
Hazeltine Research Inc |
Superregenerative superheterodyne wave-signal receiver
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US2608648A
(en)
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1948-03-23 |
1952-08-26 |
Motorola Inc |
Highly selective radio receiver
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1948-12-29 |
1952-10-28 |
Zenith Radio Corp |
Radio receiving apparatus
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(en)
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1951-09-12 |
1955-11-29 |
Rca Corp |
Gate control circuit
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US2860310A
(en)
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1954-06-30 |
1958-11-11 |
Hoffman Radio Corp |
Variable bandwidth crystal filter circuits or the like
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US3028487A
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*
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1958-05-01 |
1962-04-03 |
Hughes Aircraft Co |
Digital phase demodulation circuit
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US3413554A
(en)
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1965-05-03 |
1968-11-26 |
Bendix Corp |
Transceiver with self-tuning transmitter controlled by receiver
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US3541451A
(en)
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1967-12-26 |
1970-11-17 |
Magnavox Co |
Variable center frequency filter for frequency modulation receiver
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US3549811A
(en)
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1969-10-07 |
1970-12-22 |
Einar Borresen |
Radio transmission system
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*
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1971-01-04 |
1972-05-23 |
Gen Electric |
Signal processor for reception of amplitude or frequency modulated signals
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US3701950A
(en)
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1971-04-14 |
1972-10-31 |
Bell Telephone Labor Inc |
Narrow-band filter
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*
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1971-09-21 |
1976-01-20 |
General Electric Company |
Four channel stereophonic broadcasting system
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US3835384A
(en)
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1972-12-20 |
1974-09-10 |
Gen Dynamics Corp |
Tuning system
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US3989896A
(en)
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1973-05-08 |
1976-11-02 |
Westinghouse Electric Corporation |
Method and apparatus for speech identification
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DE2358288A1
(de)
*
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1973-11-22 |
1975-06-05 |
Standard Elektrik Lorenz Ag |
Empfaenger fuer frequenzmodulierte hf-signale
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US3921085A
(en)
*
|
1973-11-23 |
1975-11-18 |
William J Keane |
Frequency discriminator apparatus
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US3961121A
(en)
*
|
1973-12-14 |
1976-06-01 |
Rubin Warsager |
Transfer tape for surface decorating an article
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US3931578A
(en)
|
1973-12-26 |
1976-01-06 |
General Electric Company |
Multiple frequency band receiver tuner system using single, non-bandswitched local oscillator
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US3878334A
(en)
*
|
1974-04-10 |
1975-04-15 |
Gen Dynamics Corp |
Data synchronizing systems
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US4018994A
(en)
*
|
1974-07-10 |
1977-04-19 |
Kahn Leonard R |
Compatible AM stereophonic receivers
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US3932818A
(en)
*
|
1974-07-18 |
1976-01-13 |
Hazeltine Corporation |
Spectrum notcher
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US3942121A
(en)
*
|
1974-09-09 |
1976-03-02 |
Texas Instruments Incorporated |
Digital tuning method and system
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US3931467A
(en)
*
|
1974-10-24 |
1976-01-06 |
Warwick Electronics Inc. |
Synchronizing circuit having a variable bandpass filter
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US3991374A
(en)
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1975-02-26 |
1976-11-09 |
General Electric Company |
Controllable bandwidth IF filter circuit for radio receivers
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JPS51127609A
(en)
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1975-04-28 |
1976-11-06 |
Trio Kenwood Corp |
Switching circuit for band width of intermediate frequency amplifying stage of fm receiver
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(en)
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1975-06-24 |
1976-11-16 |
Honeywell Inc. |
Receiver equalizer apparatus
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(en)
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1975-10-28 |
1977-08-30 |
The United States Of America As Represented By The Secretary Of The Army |
Method for optimizing the bandwidth of a radio receiver
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US4252686A
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*
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1976-04-29 |
1981-02-24 |
John Mooi |
Catalyst and process for conversion of hydrocarbons
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GB1592780A
(en)
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1976-12-21 |
1981-07-08 |
Plessey Co Ltd |
Frequency control systems
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US4206317A
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*
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1977-01-31 |
1980-06-03 |
Kahn Leonard R |
Reduction of adjacent channel interference
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US4160212A
(en)
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1977-05-26 |
1979-07-03 |
Raytheon Company |
Radio frequency receiver having serially coupled heterodyning stages, each stage having filters with difference center frequencies
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JPS5828968B2
(ja)
*
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1977-08-31 |
1983-06-20 |
ソニー株式会社 |
Pll方式周波数シンセサイザチュ−ナ
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(en)
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1977-12-22 |
1980-10-14 |
Communications Satellite Corporation |
Communication satellite transponder interconnection utilizing variable bandpass filter
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*
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1978-08-10 |
1981-03-17 |
Hewlett-Packard Company |
Apparatus for spectrum analysis of an electrical signal
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US4214451A
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1978-11-13 |
1980-07-29 |
Systems Control, Inc. |
Energy cogeneration system
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*
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1979-06-04 |
1981-06-02 |
Anderson James C |
Speech signal A/D converter using an instantaneously-variable bandwidth filter
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*
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1979-06-11 |
1983-03-01 |
International Automated Machinery, Inc. |
Continuous rotary machine and method for forming, filling, and sealing package of laminated sheet material
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1979-06-12 |
1984-05-22 |
General Electric Company |
Discriminator circuit for frequency modulation receivers
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*
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1979-06-29 |
1981-04-14 |
Edmac Associates, Inc. |
Variable bandwidth filtering and frequency converting system
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JPS5613834A
(en)
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1979-07-14 |
1981-02-10 |
Nippon Gakki Seizo Kk |
Synthesizer tuner
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*
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1979-09-25 |
1982-02-16 |
Rogers Jr Walter M |
Tracking filter for FM threshold extension
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US4352200A
(en)
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1979-10-09 |
1982-09-28 |
Bell And Howell Company |
Wireless aircraft passenger audio entertainment system
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US4339828A
(en)
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1979-10-12 |
1982-07-13 |
Chasek Norman E |
Automatic method for advantageously trading signal distortion for improved noise threshold in frequency modulated receivers
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1979-11-23 |
1982-10-12 |
Trw Inc. |
Signal acquisition system
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JPS56106415A
(en)
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1980-01-28 |
1981-08-24 |
Hitachi Ltd |
Double conversion type tuner
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US4352208A
(en)
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1980-03-04 |
1982-09-28 |
Motorola, Inc. |
Automatic IF selectivity for radio receiver system
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US4385402A
(en)
*
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1980-04-16 |
1983-05-24 |
Redifon Telecommunications Limited |
Switchable filter circuits
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FR2490427B1
(fr)
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1980-09-16 |
1986-04-18 |
Thomson Csf |
Demodulateur d'un signal module en frequence et systeme de television comportant un tel demodulateur
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JPS5793704A
(en)
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1980-12-03 |
1982-06-10 |
Alps Electric Co Ltd |
Fm demodulation circuit
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DE3114063A1
(de)
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1981-04-07 |
1982-10-21 |
Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt |
Empfangssystem
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JPS57171845A
(en)
*
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1981-04-15 |
1982-10-22 |
Sony Corp |
Phase locked loop circuit
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CA1190289A
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*
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1981-04-28 |
1985-07-09 |
Nippon Hoso Kyokai |
Fm signal demodulation system
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DE3175644D1
(en)
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1981-08-31 |
1987-01-08 |
Oki Electric Ind Co Ltd |
High-sensitivity fm signal demodulation system
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EP0086839B1
(de)
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1981-08-31 |
1986-12-03 |
Oki Electric Industry Company, Limited |
Hochempfindlicher fm-demodulator
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USRE33381E
(en)
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1981-08-31 |
1990-10-09 |
|
Multiple system AM stereo receiver and pilot signal detector
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*
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1981-12-30 |
1986-04-01 |
Motorola, Inc. |
Fully integratable superheterodyne radio receiver utilizing tunable filters
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1982-09-01 |
1984-11-20 |
Rca Corporation |
Shared counter arrangement for a digital frequency locked loop tuning system for selectively measuring the frequencies of the LO and IF signals
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US4553264A
(en)
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1982-09-17 |
1985-11-12 |
Matsushita Electric Industrial Co., Ltd. |
Double superheterodyne tuner
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*
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1983-04-01 |
1986-06-24 |
Psr Products, Inc. |
Modulation detector and classifier
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JPS59185433A
(ja)
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1983-04-06 |
1984-10-22 |
Trio Kenwood Corp |
Am受信機
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1983-05-16 |
1985-11-05 |
Motorola, Inc. |
Synthesized multiple conversion receiver system with provision for avoiding receiver self-quieting spurious response
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*
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1983-07-15 |
1986-03-04 |
Larry Schotz |
Stereophonic receiver having a noise reduction control circuit
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GB2148064B
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*
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1983-10-14 |
1986-11-19 |
Philips Electronic Associated |
Image rejection mixer circuit
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GB2158330A
(en)
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1984-04-30 |
1985-11-06 |
Philips Electronic Associated |
An afc system for a direct modulation fm data receiver
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US4626894A
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1984-10-04 |
1986-12-02 |
Rca Corporation |
Signal filtering system having adaptively cascaded filter stages for developing a variable bandwidth frequency characteristic
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*
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1984-10-25 |
1988-03-15 |
Stc, Plc |
Multi-mode radio transceiver
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DE3447283A1
(de)
*
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1984-12-24 |
1986-07-10 |
Telefunken electronic GmbH, 7100 Heilbronn |
Funkempfaenger
|
JPS61148926A
(ja)
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1984-12-24 |
1986-07-07 |
Kokusai Denshin Denwa Co Ltd <Kdd> |
通信衛星中継器
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1985-03-27 |
1987-07-07 |
Cincinnati Microwave, Inc. |
FM receiver
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1985-04-04 |
1990-01-09 |
Motorola, Inc. |
Digital radio frequency receiver
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GB2176356A
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1985-06-12 |
1986-12-17 |
Philips Electronic Associated |
Method of, and demodulator for, digitally demodulating an ssb signal
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GB2177875A
(en)
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1985-07-08 |
1987-01-28 |
Philips Electronic Associated |
Radio transmission system
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1985-09-10 |
1987-06-23 |
Motorola, Inc. |
FM demodulator
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US4653117A
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1985-11-18 |
1987-03-24 |
Motorola, Inc. |
Dual conversion FM receiver using phase locked direct conversion IF
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*
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1986-02-28 |
1988-04-12 |
Hitachi, Ltd. |
Digitally processed demodulator for quadrature modulated signals
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US4691176A
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1986-03-17 |
1987-09-01 |
General Electric Company |
Adaptive carrier tracking circuit
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1986-03-27 |
1988-04-19 |
Hekimian Laboratories, Inc. |
Frequency modulation television receiver with tracking filter
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*
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1986-05-12 |
1988-03-22 |
Motorola, Inc. |
Digital zero IF selectivity section
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*
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1986-09-04 |
1988-02-23 |
Arvin Industries, Inc. |
Microprocessor controlled tuning system
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EP0276144B1
(de)
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1987-01-20 |
1993-11-18 |
Matsushita Electric Industrial Co., Ltd. |
Empfänger für Erd- und Satellitenrundfunk
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GB8704871D0
(en)
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1987-02-27 |
1988-04-27 |
British Aerospace |
Digital signal demodulation
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DE3764361D1
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1987-03-14 |
1990-09-20 |
Itt Ind Gmbh Deutsche |
Fernsehsignal-frequenzumsetzungsschaltung.
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*
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1987-03-18 |
1990-04-17 |
Connor Edward O |
FM receiver method and system for weak microwave television signals
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DE3724604A1
(de)
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1987-04-15 |
1988-12-01 |
H U C Elektronik Gmbh |
Anordnung zum filtern eines fm-ukw-empfangssignals
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US4884265A
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1987-04-30 |
1989-11-28 |
Loral Corporation |
Digital demodulator for frequency-division-multiplexed signals
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EP0305603B1
(de)
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1987-09-03 |
1993-03-10 |
Koninklijke Philips Electronics N.V. |
Phasen- und Verstärkungsregelung für einen Empfänger mit zwei Zweigen
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US4791377A
(en)
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1987-10-20 |
1988-12-13 |
Gte Government Systems Corporation |
Direct frequency synthesizer
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FR2623673B1
(fr)
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1987-11-19 |
1994-07-22 |
Alcatel Thomson Radiotelephone |
Dispositif d'amelioration du confort d'ecoute en presence d'evanouissement de porteuse dans une chaine de reception d'un equipement fm/pm a bande etroite, notamment en radiotelephonie
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FR2623672A1
(fr)
|
1987-11-19 |
1989-05-26 |
Alcatel Thomson Radiotelephone |
Dispositif d'amelioration du confort d'ecoute par suppression des phenomenes transitoires dans une chaine de reception d'un equipement fm/pm a bande etroite, notamment en radiotelephonie
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US4882668A
(en)
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1987-12-10 |
1989-11-21 |
General Dynamics Corp., Pomona Division |
Adaptive matched filter
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US5124817A
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*
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1988-01-19 |
1992-06-23 |
National Semiconductor Corporation |
Polysilicon emitter and a polysilicon gate using the same etch of polysilicon on a thin gate oxide
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1988-01-28 |
1989-08-15 |
Motorola, Inc. |
Method and arrangement for a sigma delta converter for bandpass signals
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JP2546331B2
(ja)
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1988-04-26 |
1996-10-23 |
ソニー株式会社 |
Fm・am受信機
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DE3818751A1
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*
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1988-05-30 |
1989-12-07 |
H U C Elektronik Gmbh |
Fm-empfangsteil
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NL8801412A
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1988-06-02 |
1990-01-02 |
Philips Nv |
Asymmetrisch polyfase filter.
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1988-07-14 |
1990-05-22 |
Ashtech Telesis, Inc. |
Global positioning system receiver with improved radio frequency and digital processing
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1988-08-09 |
1990-07-24 |
At&E Corporation |
Direct conversion FM receiver with offset
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1988-10-03 |
1993-06-15 |
Motorola, Inc. |
Digital fm demodulator with a reduced sampling rate
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GB2223896A
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1988-10-12 |
1990-04-18 |
Philips Electronic Associated |
Radio receivers
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1988-10-13 |
1991-06-11 |
Karkota Jr Frank P |
Superheterodyne SCA receiver and method for the manufacture thereof
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DE3888185D1
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1988-11-28 |
1994-04-07 |
Siemens Ag |
Leitungstransformator.
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1988-12-22 |
1992-07-28 |
Gte Laboratories Incorporated |
Coherent subcarrier multiplexed optical communication system
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KR0151379B1
(ko)
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1989-04-21 |
1999-09-01 |
프레데릭 얀 스미스 |
동조 가능한 공진 증폭기, 주파수 합성회로 및 슈퍼헤테로다인 fm 수신기
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1989-04-27 |
1991-09-24 |
Ten-Tec, Inc. |
Variable bandwidth crystal filter with varactor diodes
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JPH088452B2
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1989-06-08 |
1996-01-29 |
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Ssb変調装置及びssb復調装置
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1989-07-14 |
1991-04-23 |
Inline Connection Corporation |
Video transmission and control system utilizing internal telephone lines
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1989-08-01 |
1991-10-01 |
Zenith Electronics Corporation |
Tunable UHF filter for switchable VHF/UHF receiver
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1989-08-04 |
1991-02-12 |
General Electric Company |
Radio frequency receiver for a NMR instrument
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DK0486554T3
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1989-08-11 |
1994-12-27 |
Siemens Ag Oesterreich |
Fremgangsmåde og indretning til omsætning af digitalt modulerede modtagesignaler fra højfrekvensområdet
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1989-09-01 |
1991-06-04 |
Andronic Devices, Ltd. |
Locking mechanism for medical devices
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EP0420269A3
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1989-09-28 |
1992-12-30 |
Fujitsu Limited |
Adaptive digital filter including low-pass filter
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1989-11-02 |
1991-03-26 |
Motorola, Inc. |
Direct conversion FM receiver
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DE3938126A1
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1989-11-16 |
1991-05-23 |
Philips Patentverwaltung |
Empfaenger mit direkter quadratur-abtastung des eingangssignals
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GB2239571B
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1989-12-29 |
1994-08-03 |
Schlumberger Ind Ltd |
Transponder
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1990-03-09 |
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Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed rf measurement receiver
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GB9005750D0
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1990-03-14 |
1990-05-09 |
Linear Modulation Tech |
Frequency control in single sideband mobile radio systems
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1990-03-23 |
1992-03-10 |
Rockwell International Corporation |
Direct conversion receiver with tri-phase architecture
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1990-04-30 |
1992-01-07 |
Harris Corporation |
Digital decimation filter
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1990-07-17 |
1991-11-12 |
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Method and apparatus for free-standing water removal from roof and siphon head therefore
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EP0467712B1
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1990-07-20 |
1998-04-29 |
Nec Corporation |
Phasendemodulator für PSK-modulierte Signale
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EP0474921B1
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1990-09-11 |
1995-11-22 |
Koninklijke KPN N.V. |
Optisches Übertragungsnetzwerk mit Frequenzverkopplungsmitteln
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1990-09-14 |
1992-03-31 |
Ford Motor Company |
Rf filter alignment using digital processor clock
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1990-12-07 |
1992-08-18 |
Ford Motor Company |
FM resonant filter having AM frequency bypass
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1990-12-21 |
1992-03-17 |
The United States Of America As Represented By The Secretary Of The Navy |
Adaptive filter technique for suppression of wideband or offset narrowband radio frequency interference
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1991-01-24 |
1993-07-20 |
Rockwell International Corporation |
System for controlling phase and gain errors in an i/q direct conversion receiver
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(en)
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1991-02-25 |
1993-09-28 |
Rockwell International Corporation |
Phase and gain error control system for use in an i/q direct conversion receiver
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1991-03-29 |
1993-05-25 |
Motorola, Inc. |
Image separation mixer
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JPH04310037A
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1991-04-09 |
1992-11-02 |
Nec Corp |
Fsk受信機
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1991-04-29 |
1998-09-22 |
Baker Hughes Incorporated |
Method and apparatus for determining influence of mutual magnetic coupling in electromagnetic propagation tools
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GB9115350D0
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1991-07-16 |
1991-08-28 |
Navstar Ltd |
A radio receiver
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1991-09-03 |
1993-09-28 |
General Electric Company |
Order recursive lattice decision feedback equalization for digital cellular radio
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*
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1991-09-03 |
1994-02-08 |
General Electric Company |
Adaptive MLSE-VA receiver for digital cellular radio
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*
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1991-09-06 |
1994-01-18 |
Ford Motor Company |
RF filter self-alignment for multiband radio receiver
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