Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission
Patents for H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission (188,568)
12/1983
12/07/1983EP0095564A1 Mobile broadcast receiver, such as a car radio or the like
12/06/1983US4419770 Wrist AM radio receiver
12/06/1983US4419749 Magnetic reproducing apparatus capable of receiving radio broadcast programs
12/06/1983US4419693 Error concealment in digital television signals
12/06/1983US4419541 Pulsive noise removing apparatus
12/06/1983US4418830 Moisture and dust seal arrangement for a portable radio or the like
12/06/1983CA1158317A1 Strong and weak signal preamplification system
12/06/1983CA1158172A1 Noise reduction circuit
12/06/1983CA1158171A1 Circuit for noise reduction particularly useful with signal recording/reproducing apparatus
11/1983
11/29/1983US4418427 Tuning system for a multi-band television receiver
11/29/1983US4418426 Emergency citizens' band radio system
11/29/1983US4418416 Frequency modulation transmitter for voice or data
11/29/1983US4418404 Single-sideband acoustic telemetry
11/29/1983US4418393 Matched filter spread spectrum code recovery apparatus
11/29/1983US4418249 Four-wire terminating circuit
11/23/1983EP0094431A1 Telemetry system with signal booster for digital data transmission through a transmission line
11/23/1983EP0094420A1 Data muting method and apparatus for radio communications systems.
11/23/1983EP0094417A1 Random frequency offsetting apparatus for multi-transmitter simulcast radio communications systems
11/22/1983US4417358 Amplitude modulated transmitter for single sideband operation
11/22/1983US4417348 Errorless line protection switcher
11/22/1983US4417103 Stereo reproduction with gapless splicing of pitch altered waveforms
11/16/1983EP0093803A2 Indicating system
11/15/1983US4416024 Distortion reducing circuit in FM receiver
11/15/1983US4416023 Strong and weak signal preamplification system
11/15/1983US4416017 Apparatus and method for attenuating interfering signals
11/15/1983US4415866 Circuit for dynamic compression and/or expansion
11/15/1983US4415777 Hybrid circuit including capacitive charge-transfer means
11/15/1983US4415772 Gapless splicing of pitch altered waveforms
11/15/1983US4415768 Tuning apparatus and method
11/15/1983CA1157125A1 Electronic hybrid circuits
11/15/1983CA1157124A1 Hybrid circuit including capacitive charge-transfer means
11/10/1983WO1983003935A1 Apparatus for converting, transmitting and reconverting a sampled signal
11/09/1983EP0093651A1 Multiple-carrier receiver protected against jamming
11/09/1983EP0093219A1 Digital coding method and device for carrying out the method
11/09/1983EP0093190A1 Extrema coding signal processing method and apparatus
11/08/1983US4414688 RF-Input stage
11/08/1983US4414534 Radio frequency detection circuitry having noise discrimination capability
11/08/1983CA1156765A1 Digital frequency synthesizer
11/01/1983CA1156385A1 Channel identification apparatus useful in a sweep type tuning system
10/1983
10/27/1983WO1983003726A1 Program-selecting device
10/26/1983EP0092442A2 Phase synchronizing circuit
10/26/1983EP0092219A1 Battery saving circuit for paging receiver or the like
10/26/1983EP0092055A1 Mobile broadcast receiver, such as a car radio or the like
10/25/1983US4412337 Power amplifier and envelope correction circuitry
10/25/1983US4412106 High fidelity stereophonic reproduction system
10/25/1983CA1155979A1 Frequency agile satellite receiver
10/25/1983CA1155937A1 Hybrid circuit
10/25/1983CA1155928A1 Sequential channel selector system
10/25/1983CA1155926A1 Radio with audio graphic equalizer
10/19/1983EP0091695A2 Battery saver circuit for use with paging receiver
10/19/1983EP0091581A2 Crossed beam high frequency anti-theft system
10/18/1983US4411020 Power efficient radio receiver apparatus
10/18/1983US4411018 Rapidly stabilized Gunn oscillator transceiver
10/18/1983US4410979 Multiplexed signal receiver
10/18/1983US4410954 Digital frequency synthesizer with random jittering for reducing discrete spectral spurs
10/18/1983US4410762 Dual mode tone detector circuit
10/13/1983WO1983003505A1 Frequency-hopped single sideband mobile radio system
10/13/1983WO1983003504A1 Supply circuit included in a dc-magnetized hybrid transformer
10/13/1983WO1983003503A1 Pen-size radio
10/13/1983WO1983003502A1 Up/down counter control circuit
10/12/1983EP0091129A2 Reconfiguration control method for a loop-type data network
10/11/1983US4409627 Video signal decoding circuit
10/11/1983CA1155242A1 Digital frequency lock tuning system
10/11/1983CA1155226A1 Adaptive prediction differential-pcm transmission method and circuit using filtering by sub-bands and spectral analysis
10/11/1983CA1155183A1 Signal detecting circuit
10/11/1983CA1155181A1 Single sideband receiver with pilot-based feed forward correction for motion-induced distortion
10/05/1983EP0090703A1 Protection device for a high-frequency, high-power variable inductance
10/04/1983US4408351 Directly mixing receiving system
10/04/1983US4408350 Enhanced selectivity signal receiver
10/04/1983US4408349 Receiver provided with a frequency synthesizer capable of storing fine tuning information
10/04/1983US4408348 Multiband tuning system for a television receiver
10/04/1983US4408132 Hysteresis circuit
10/04/1983US4408098 Receiver with field-strength dependent noise reduction control
09/1983
09/28/1983EP0089853A2 Interference wave detection circuit for use in radio receiver
09/28/1983EP0089649A2 Radio transmitter/receiver
09/28/1983EP0089350A1 Electronic terminator circuit
09/21/1983EP0089095A1 A system for processing audio frequency information for frequency modulation
09/21/1983EP0089078A2 Circuit arrangement for an FM receiver
09/21/1983EP0088837A1 Radio transmitting and receiving apparatus
09/20/1983US4406019 Selectivity means in amplitude modulated radio receivers
09/20/1983US4405924 Remote control switch apparatus for automobiles
09/20/1983US4405836 Signal equalization selector
09/20/1983US4405835 Receiver for AM stereo signals having a circuit for reducing distortion due to overmodulation
09/20/1983US4405834 Circuit for receiving two-tone/stereophonic programs
09/20/1983CA1154150A1 Ghost cancelling system
09/20/1983CA1154096A1 Multiplex signal receiver
09/14/1983EP0088564A2 Improvements relating to communication over noisy lines
09/14/1983EP0088467A2 FM receiver including a frequency-locked loop
09/13/1983US4404685 Frequency control system for radio apparatus employing filter amplifier operated at harmonic of frequency of synthesized signal source
09/13/1983US4404600 Ghost signal cancelling apparatus
09/07/1983EP0087841A1 Use of a dual gate field-effect transistor with an interposed conductor for the rejection of a frequency band
09/06/1983US4403349 Intermediate frequency detection circuit
09/06/1983US4403348 Single sideband receiver with intersyllabic gain correction limit control
09/06/1983US4403347 Antenna tuning circuit for AM radio receiver
09/06/1983US4403346 AGC System for wide band tuner
09/06/1983US4403344 Receiver having program reserving function
09/06/1983US4403342 Zone switching system for a frequency synthesized transceiver
09/06/1983US4403341 Emergency information communicating device
09/06/1983US4403255 FM/TV Automatic gain control system
09/06/1983US4403139 Redundant light source circuit
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