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)
01/1983
01/25/1983CA1140241A1 Visor and garage door operation assembly
01/20/1983WO1983000238A1 Connecting unit for a ring bus
01/19/1983EP0069928A1 Spread spectrum transmission system
01/18/1983US4369523 Remote control system of an optical repeater
01/18/1983US4369521 Radio receiving apparatus using headphone connector cable as an antenna
01/18/1983US4369509 Gain control circuit for noise reduction system
01/18/1983US4369478 Automobile magnetic tape playing apparatus
01/18/1983US4369446 Antenna input circuit
01/18/1983US4369414 High-frequency input circuit for two inputs
01/18/1983CA1139884A1 Half duplex integral vocoder modem system
01/18/1983CA1139846A1 Receiver input circuit
01/18/1983CA1139845A1 Wireless transmitting and receiving device using an ear microphone
01/12/1983EP0069214A1 Circuit for measuring the reception quality of an FM receiver
01/12/1983EP0069213A2 Combined car radio cassette unit
01/11/1983US4368541 Multiplexing arrangement for a plurality of voltage controlled filters
01/11/1983US4368540 Phase locked loop tuning system including a prescaler conditioned to oscillate at an out-of-band frequency
01/11/1983US4368362 Automatic telephone loaded/nonloaded facility type identification circuit
01/11/1983US4368361 Automatically adjustable bidirectional-to-unidirectional transmission network
01/11/1983CA1139365A1 Circuit for generating a control voltage depending upon the amplitude of an alternating voltage
12/1982
12/28/1982US4366578 Transmit/receive mode protection arrangement
12/28/1982US4366482 Transmitter with buzzer
12/28/1982US4366471 Variable speed digital reproduction system using a digital low-pass filter
12/28/1982US4366441 Signal-muting circuit for bridge amplifier
12/23/1982WO1982004512A1 Signal booster for digital data transmision through transmission lines
12/23/1982WO1982004511A1 Intermodulation cancelling mixer
12/21/1982US4365327 Method of and means for spread-spectrum transmission
12/21/1982US4365248 Digital transmission link relief triggering system
12/21/1982US4365247 End station digital transmission link relieving system
12/21/1982US4365205 Demodulator for signal which is frequency modulated by digital data
12/15/1982EP0066947A1 Successive frame digital multiplexer with increased channel capacity
12/15/1982EP0066796A1 Control circuit for semiconductor element with control electrode
12/14/1982CA1137665A1 Self-adjusting hybrid network
12/14/1982CA1137623A1 Muting circuit for a television receiver
12/09/1982WO1982004365A1 Radio transmitter modulation control circuitry
12/08/1982EP0066412A1 Method of processing analog signals
12/08/1982EP0066110A2 Noise removing apparatus in an FM receiver
12/08/1982EP0066037A1 UHF receiver for a traffic information radio broadcasting system
12/07/1982US4363139 Radio frequency receiver
12/07/1982US4363138 Signal presence detector and method
12/07/1982US4363007 Noise reduction system having series connected low and high frequency emphasis and de-emphasis filters
12/07/1982US4363006 Noise reduction system having series connected variable frequency filters
12/07/1982US4362906 FM Receiver
12/07/1982CA1137234A1 Memory control circuit for a receiver
12/07/1982CA1137179A1 Antenna isolation device
12/01/1982EP0065615A1 UHF receiver for a traffic information radio broadcasting system
11/1982
11/30/1982US4361906 Channel selector having a plurality of tuning systems
11/30/1982US4361905 Arrangement for connecting selected antennas to a radio for transmitting and receiving
11/30/1982US4361904 Method of testing transceiver and transceiver including testing apparatus
11/30/1982US4361891 Spread spectrum signal estimator
11/30/1982US4361890 Synchronizing system
11/30/1982US4361728 Multiplex signal receiver
11/30/1982CA1136711A1 Adaptive cross-polarization interference cancellation arrangements
11/24/1982EP0065210A2 Electrical signal conditioning method with a digital filter device
11/24/1982EP0065013A1 Tuner
11/23/1982CA1136229A1 Electronic hybrid
11/23/1982CA1136227A1 Coaxial cable switching circuit
11/17/1982EP0064750A2 Gapless splicing of pitch altered waveforms
11/17/1982EP0004759B1 Methods and apparatus for encoding and constructing signals
11/16/1982US4359701 Construction of tuning circuit in tuner
11/16/1982US4359655 Timer circuit
11/16/1982US4359609 Circuit with feedback for controlling the impedance thereof
11/16/1982US4359608 Adaptive sampler
11/16/1982EP0053630A4 Wideband transceiver with emi suppression.
11/10/1982EP0064119A2 Speech coding methods and apparatus for carrying out the method
11/09/1982US4358844 Method of and means for spread-spectrum transmission
11/09/1982US4358644 Bilateral current source for a multi-terminal intercom
11/09/1982US4358643 Two to four wire hybrid circuit
11/09/1982US4358638 Apparatus for receiving an AM stereophonic signal
11/09/1982CA1135426A1 Channel selecting apparatus employing frequency synthesizer
11/03/1982EP0063819A2 Microwave balanced mixer circuit using microstrip transmission lines
11/02/1982US4357712 Radio receiver
11/02/1982US4357711 Two way radio safety helmet
11/02/1982US4357631 Ghost cancelling system
11/02/1982US4357494 Impedance canceller circuit
11/02/1982CA1134969A1 Uhf electronic tuner
11/02/1982CA1134918A1 Protected amplifier apparatus
10/1982
10/28/1982WO1982003738A1 Direct current magnetized hybrid transformer
10/26/1982US4356568 Receptive condition automatic selection device for FM receiver
10/26/1982US4356567 Radio receiver with bandwidth switching
10/26/1982US4356350 FM Receiver
10/26/1982CA1134520A1 Tuning apparatus
10/26/1982CA1134448A1 Adaptive interference suppression arrangement
10/20/1982EP0062872A1 Receiving system
10/19/1982US4355422 Tunable radio receiver with detuning prevention due to power supply variations
10/19/1982US4355419 Radio signal receiving system having means for selectively combining signals from a plurality of receiving sections
10/19/1982US4355414 Automatic gain control system
10/19/1982US4355413 Phase locked loop circuit
10/19/1982US4355407 Device for disconnecting the receiver in case of a small signal-to-noise ratio for a digital-modulated radio system
10/19/1982US4355401 Radio transmitter/receiver for digital and analog communications system
10/19/1982US4355399 Adaptive spread spectrum FH-MFSK transmitter and receiver
10/19/1982US4355367 Waveform synthesizer arrangement
10/19/1982CA1134082A2 Frequency synthesizer tuning system for television receivers
10/19/1982CA1133995A1 Filter for microwaves
10/14/1982WO1982003477A1 Frequency synthesized transceiver
10/13/1982EP0062590A1 Radio receiver with indicator of the reception of a transmission
10/12/1982US4354057 Predictive signal coding with partitioned quantization
10/05/1982US4353132 Double superheterodyne tuner
10/05/1982US4353127 Duplex transceiver arrangements for rebroadcast of signals
10/05/1982US4353091 Circuit for detecting faults in horizontal sync pulse signals
10/05/1982US4353035 Circuit for compression or expansion of an electrical signal
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