| Patents for H04B 15 - Suppression or limitation of noise or interference (10,227) |
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| 07/29/1993 | DE4201616A1 X=ray device - has damping arrangement contained in high voltage cables, heat converter in tube protection housing |
| 07/22/1993 | DE4200491A1 Input protection circuit for data line semiconductor circuit - has transformer with centre tap on input coil, with output coil coupled to protection circuit outputs |
| 07/20/1993 | US5230094 Method and apparatus for intermediate frequency selection in a heterodyne receiver |
| 07/10/1993 | CA2069462A1 Rf repeater arrangement with reduced noise for wireless telephones |
| 07/07/1993 | EP0550143A2 MLSE for mobile radio channels |
| 07/06/1993 | US5226058 Spread spectrum data processor clock |
| 07/06/1993 | US5225792 Oscillator circuit having means for switching between oscillator configurations |
| 06/24/1993 | DE4142341A1 Noise protection filter for electrical equipment - having symmetrically driven line, contains chokes connected into line vias contact arrangement |
| 06/03/1993 | DE4235177A1 Speichervorrichtung zur unterdrueckung von rauschen, das zwischen signal-leitungen hervorgerufen wird Rushing storage device to suppress, which is caused between signal-lines |
| 06/03/1993 | DE4138958A1 Control circuit for digital power semiconductor component - has annular ferromagnetic body around insulated control line |
| 06/01/1993 | US5216721 Multi-channel active acoustic attenuation system |
| 05/27/1993 | WO1993010604A1 A spread-time code division multiple access technique with arbitrary spectral shaping |
| 05/18/1993 | US5212833 Microcomputer controlled synthesizer-type radio receiver |
| 05/13/1993 | WO1993009606A1 Oscillator frequency divide-down transmit offset scheme for reducing self-quieting |
| 05/11/1993 | US5210857 Data processing apparatus with noise avoidance |
| 05/11/1993 | US5209195 Ignition distributor |
| 05/06/1993 | DE4136248A1 Plug connector with inbuilt inductance for electrical appliances - has connections to coil moulded into body having formed apertures in connecting region |
| 05/04/1993 | US5208494 Method for the elimination of transients from the operating voltage of TDMA system |
| 04/27/1993 | US5205751 Electrically-conductive elastomeric connector |
| 04/21/1993 | CN1071128A Burglar alarm device integrated with car stereo radio |
| 04/15/1993 | WO1993007598A1 Combination liquid crystal display driver and varactor voltage power supply |
| 04/08/1993 | DE4233078A1 Stabilised DC power supply unit for, e.g. CD or cassette player and/or tuner - has switch reacting to device mode of operation to select state by which stabilisation is performed using series transistor |
| 04/07/1993 | EP0535742A2 Signal clamping |
| 04/06/1993 | US5200703 Anti-interference filter for a gradient coil in a nuclear magnetic resonance imaging apparatus |
| 03/18/1993 | DE4130495A1 Compensator for modulation interference caused by travelling field tube noise components - has heating current noise component sensor in tube heating circuit connected to a resistor in cathode tube connector. |
| 03/11/1993 | DE4129382A1 Opto-coupler protection circuit maintaining galvanic separation - uses damped series oscillation circuit in parallel with opto-coupler |
| 03/03/1993 | EP0529144A1 Far-end echo canceller |
| 02/25/1993 | DE4206278A1 Integriertes schaltkreis-bauelement mit unterdrueckten stromversorgungsstoerungen Integrated-circuit-component-with oppressed stromversorgungsstoerungen |
| 02/25/1993 | DE4132813C1 Electrically powered fuel pump for motor vehicle - suppresses radio interference by having two radio interference by having two capacitors in series for projecting terminal pins |
| 02/24/1993 | CN1069373A Electromagnetic radiation shielding and anti-interference device |
| 01/26/1993 | US5182531 Interference protected electronic apparatus |
| 01/13/1993 | EP0521995A1 Transmission and reception in a hostile interference environment. |
| 01/12/1993 | US5179362 Power line filter |
| 12/30/1992 | CN1067541A Data bus interface apparatus |
| 12/29/1992 | US5175743 Spread-time code division multiple access technique with arbitrary spectral shaping |
| 12/24/1992 | DE4218058A1 Motorschaltung Motor circuit |
| 11/17/1992 | US5165055 For decreasing electromagnetic and radio frequency interferences |
| 11/04/1992 | WO1992020207A1 Electrical interconnect apparatus |
| 11/04/1992 | CA2083278A1 Electrical interconnect apparatus |
| 10/28/1992 | EP0510864A2 Multi-channel active acoustic attenuation system |
| 10/22/1992 | DE4112672A1 Reduction of noise current in microprocessor system - controlling operating clock frequency w.r.t. program activity level to relate to average clock frequency value |
| 10/21/1992 | CN2119729U Apparatus for identifying and controlling voice and noise |
| 10/16/1992 | WO1992019047A1 Apparatus for filtering and amplifying an oscillator |
| 10/16/1992 | CA2078231A1 Apparatus for filtering and amplifying an oscillator |
| 10/14/1992 | EP0284627B1 Digital audio companding and error conditioning |
| 10/13/1992 | US5155648 Device for protecting a direct current electrical power supply from disturbances caused by connecting to it or disconnecting from it an electronic system |
| 10/13/1992 | CA1308773C Static converter comprising a protective filter against high-frequency disturbances |
| 10/06/1992 | US5153539 Magnetic core for a signal line filter |
| 10/06/1992 | CA1308362C Noise suppression system |
| 10/01/1992 | DE4110524A1 High bit-rate pulse transmission circuit for PCB-mounted semiconductor circuits - has noise suppression circuit comprising passive components made by thick or thin-film techniques e.g. miniature coil and resistor |
| 10/01/1992 | DE4106580A1 HV interference suppressing resistor for ignition plug - has wound resistance carrier with HF absorbing layer |
| 09/29/1992 | US5152007 Method and apparatus for detecting speech |
| 09/22/1992 | US5150282 Electromagnetic shielding structure of high-frequency circuit arrangements |
| 09/17/1992 | WO1992016062A1 Data bus interface apparatus |
| 09/17/1992 | WO1992015955A1 Signal processing apparatus and method |
| 09/15/1992 | US5148447 Control device in transceiver |
| 09/02/1992 | EP0501314A1 Modular distributed antenna system |
| 08/25/1992 | US5142252 Audio signal transmission line with a low pass filter |
| 08/25/1992 | US5142167 Encoding for simultaneous switching output noise reduction |
| 07/30/1992 | DE4102347A1 Interference voltage suppression system e.g. for vehicle electrical equipment - has operational equipment for interference voltage pulses, whole output activates operational circuit |
| 07/29/1992 | EP0496498A2 Time-division duplex radio transceiver |
| 07/22/1992 | EP0495470A2 Device for noise suppressing of a switched power unit |
| 07/21/1992 | CA1305431C Audio noise gate |
| 07/01/1992 | CN1017296B Ensemble modem structure for imperfect transmission media |
| 06/25/1992 | WO1992009122A3 Interference suppressant assembly |
| 06/24/1992 | EP0471799A4 Time domain radio transmission system |
| 06/23/1992 | US5124889 Electromagnetic shielding apparatus for cellular telephones |
| 06/04/1992 | DE4038315A1 Microcomputer for controlling domestic equipment - with noise protection provided by low pass filter circuit coupled across oscillator |
| 06/03/1992 | EP0487820A1 Data processing apparatus |
| 05/29/1992 | WO1992009122A2 Interference suppressant assembly |
| 05/14/1992 | DE4036472A1 Noise reduction method for superimposed signals - using second order hilbert transformation of original signal and summation with latter |
| 05/12/1992 | US5113159 Communications transmission system including facilities for suppressing electromagnetic interference |
| 05/07/1992 | DE4035134A1 Noise suppression system for electronic components - uses blocking capacitors preenting transfer of noise currents between similar component groups |
| 05/06/1992 | CN1016556B Ensemble modem structure for imperfect transmission media |
| 04/28/1992 | US5109533 Method and apparatus for cancelling noise in a received signal by signal subtraction |
| 04/28/1992 | CA1299751C Digital audio companding and error conditioning |
| 04/20/1992 | WO1992007442A1 Co-channel interference reduction system for digital high definition television |
| 04/15/1992 | EP0480323A2 Line arrangement for compensating cross-talk |
| 04/15/1992 | CN1016306B Technique for reducing distortion characteristics in fiber-optic links |
| 04/14/1992 | US5105172 Monolithically realizable radio frequency bias choke |
| 04/11/1992 | CA2052708A1 Line equipment for crosstalk compensation |
| 04/08/1992 | CN1060185A Noise eliminating element and electrical circuit having same |
| 04/07/1992 | US5102307 Electric fuel pump with radio frequency noise supression |
| 03/25/1992 | EP0476620A2 Noise reducing element and electrical circuit having the same |
| 03/19/1992 | WO1992004760A1 Electric fuel pump with radio frequency noise suppression |
| 03/18/1992 | EP0475116A2 Monolithically realizable radio frequency bias choke |
| 03/12/1992 | DE4027761A1 Spark suppressor element for electromotor switch=on - is in circuit board form with pins soldered onto motor interface |
| 03/10/1992 | US5095177 Rf sealed radio housing |
| 02/26/1992 | EP0471799A1 Time domain radio transmission system. |
| 02/25/1992 | US5091707 Coaxial cable shield filter |
| 02/13/1992 | DE4012393A1 Electromagnetic radiation absorption device - comprises container for liquid or gel and steel mesh |
| 02/12/1992 | EP0470245A1 Method for spectral estimation to improve noise robustness for speech recognition. |
| 02/11/1992 | CA1295686C Time domain radio transmission system |
| 02/04/1992 | US5086340 Co-channel interference reduction system for digital high definition television |
| 01/28/1992 | US5084685 Microcomputer having an integrated RC oscillator with programmable frequency |
| 01/28/1992 | CA1295008C Communication line filter grounding electromagnetic pulse induced voltages |
| 12/24/1991 | CA1293454C Noise reduction device in an electroacoustic system |
| 12/18/1991 | EP0461884A2 Interference source identification |
| 12/03/1991 | US5070516 Method and apparatus for reducing noise on a signal encodable on a plurality of predetermined levels |
| 11/21/1991 | EP0457595A1 Communication apparatus for transmitting and receiving communication signals through common transmission line |