Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
10/1983
10/05/1983EP0090402A2 Cicuit arrangement for automatically closing a remote power supply loop by way of substitution
10/05/1983EP0030724B1 Method and device for carrying out objective measurements on digital speech transmission systems
10/04/1983US4408345 Remote line monitoring method and device for CATV system
10/04/1983US4408332 Adaptive system in a digital data receiver providing compensation for amplitude and phase distortions introduced by a data transmission channels
10/04/1983US4408186 Power line communication over ground and neutral conductors of plural residential branch circuits
10/04/1983US4408185 Process for transferring information and system for carrying out the process
09/1983
09/28/1983EP0089681A1 Pick-up circuit
09/28/1983EP0089515A1 Power-line baseband communication system
09/28/1983EP0089350A1 Electronic terminator circuit
09/27/1983US4406924 Radio-controlled devices for use in power distribution circuits
09/21/1983EP0088953A1 Automotive vehicle electric connecting device
09/21/1983EP0088862A1 System for the transmission of an impulse telegram with a high Baud rate over lines of a low-voltage energy supply network
09/20/1983US4405840 Echo canceler far end energy discriminator
09/13/1983US4404427 Audio signal processing system
09/13/1983CA1153701A1 Audio signal processing system
09/06/1983US4403322 Voice signal converting device
08/1983
08/31/1983EP0087138A1 Power supply system for automotive parts having a rotary component
08/31/1983EP0087052A2 Arrangement for the non-contacting and non-touching transmission of measuring and control signals
08/30/1983US4401861 Semiconductor crosspoint linearizing arrangement
08/24/1983EP0086463A2 Delay equalizer for electrical communication apparatus
08/23/1983US4400688 Method and apparatus for communication over electric power lines
08/23/1983CA1152650A1 Pcm and pam conversion circuit including signal level variation on the pcm portion of the circuit
08/23/1983CA1152596A1 Equalizer sample loading in voiceband data sets
08/23/1983CA1152595A1 Echo canceler with high-pass filter
08/23/1983CA1152594A1 Echo canceler for homochronous data transmission systems
08/23/1983CA1152577A1 Arrangement having a non-recursive filter
08/17/1983EP0086124A1 Apparatus for the correction of non-linearity by intermediate-frequency premodulation in a television equipment
08/17/1983EP0085753A1 System for the transmission of digital signal pulses over the lines of an A.C. distribution network
08/16/1983US4399547 Receiver of pulsed phase modulated signals
08/16/1983CA1152166A1 Amplitude equalizer
08/09/1983US4398178 Apparatus for transmitting information on an alternating current line
08/03/1983EP0084628A2 Cable equalizing circuit
08/02/1983US4396915 Automatic meter reading and control system
08/02/1983US4396809 Maintenance termination unit
08/02/1983US4396808 Telephone system with a ground or wire return
08/02/1983CA1151261A1 Two-way ac power line communication system
08/02/1983CA1151246A1 Method and device for training an adaptive equalizer by means of an unknown data signal in a transmission system using double sideband-quadrature carrier modulation
08/02/1983CA1151244A1 Bi-directional filter system for amplifying signals in separate frequency bands
07/1983
07/27/1983EP0084429A1 Automatic receiver gain control in centralized monitor system
07/27/1983EP0084311A1 Protection device for a coaxial cable against low frequency, high power parasitic impulses
07/27/1983EP0084098A2 Audiofrequency signals receiver
07/26/1983US4395690 Two-terminal-pair network simulating an inductance
07/26/1983US4395688 Linear phase filter with self-equalized group delay
07/26/1983US4395599 Driving point impedance derived from a transfer impedance
07/26/1983CA1150868A1 Electronic telephone circuit
07/26/1983CA1150793A1 Bus transmission system
07/19/1983US4394768 Adaptive system in a digital data receiver providing compensation for amplitude and phase distortions introduced by a data transmission channel
07/19/1983US4394767 Data transmission over long distance circuits
07/19/1983CA1150360A1 Radio system
07/12/1983CA1149980A1 Bridge amplifier
07/12/1983CA1149979A1 Adaptive echo canceller for duplex data transmission
07/07/1983WO1983002373A1 Automatic equalizer and method of initialization thereof
07/05/1983US4392252 Signal transmission system comprising a monolinearity product precorrection device
06/1983
06/29/1983EP0082791A1 Signal transmission device over a line also assuring a D.C. current supply
06/29/1983EP0082529A1 Digital echo canceller
06/29/1983EP0082410A1 Circuit for the suppression of signals on line sections
06/28/1983US4390863 System for the transmission of binary signals between the components of an alarm system
06/28/1983CA1149032A1 Adaptive filter including a delay circuit
06/28/1983CA1149031A1 Adaptive filter including a delay circuit
06/28/1983CA1149022A1 Carrier detector in a modem provided with an echo canceler
06/22/1983EP0082080A1 Method and apparatus for the transmission of signals, and use in the detection and/or measuring of the concentration of combustible gas in an atmosphere
06/22/1983EP0081875A2 Electrical data pulse processing
06/22/1983EP0081687A1 Switch arrangements for devices for parallel alternating current remote feeding
06/22/1983EP0035992B1 Data transmission arrangement
06/21/1983US4389623 Automatic equalizer ulitizing a preiodically contained reference signal
06/15/1983EP0081437A1 Echo cancelling system
06/14/1983US4388727 Receivers suitable for use in remotely-operable switching devices and data transmission systems
06/14/1983US4388725 Bus transmission system
06/14/1983CA1148224A1 Transversal equalisers
06/08/1983EP0080688A1 Method and device for the detection of data or of signalling on a telephonic path
06/08/1983EP0080509A1 Signal booster for digital data transmision through transmission lines
06/07/1983US4387466 Half-duplex digital transmission system
06/07/1983US4387270 Method of harmonizing the impedances of an audio amplifier and loudspeaker interconnected therewith
06/01/1983EP0080201A1 Method of and device for passband echo-cancelling for phase-modulated data signals
05/1983
05/31/1983US4386430 Automatic equalizer for synthesizing recursive filters
05/31/1983US4386242 Impedance matching using active couplers
05/26/1983WO1983001879A1 Interference cancellation method and apparatus
05/26/1983WO1983001877A1 Radio communication system
05/26/1983WO1983001876A1 Echo canceller
05/26/1983WO1983001873A1 Telemetry system with signal booster for digital data transmission through a transmission line
05/24/1983USRE31253 Echo cancellation in two-wire, two-way data transmission systems
05/24/1983US4385207 Line powered transformerless loudspeaking telephone
05/24/1983CA1147035A1 Four-wire line arrangement for use in a digital telecommunications system
05/18/1983EP0078884A2 Equalizer
05/17/1983CA1146667A1 Ghost cancelling system
05/11/1983WO1983001716A1 Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method
05/11/1983WO1983001715A1 An fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
05/11/1983EP0078490A2 FET driver circuit with an output shorting protection feature
05/10/1983US4383324 Digital data transmission systems
05/10/1983US4383243 Powerline carrier control installation
05/10/1983CA1146227A1 High impedance tap for tapped bus transmission systems
05/03/1983US4382164 Signal stretcher for envelope generator
04/1983
04/27/1983EP0077725A1 Current probe signal processing circuit
04/27/1983EP0077631A1 Signal phase and amplitude equalising circuit
04/26/1983US4381561 All digital LSI line circuit for analog lines
04/26/1983CA1145433A1 Data transmission system utilizing power line
04/19/1983US4380690 Hybrid circuit
04/19/1983CA1144999A1 Arrangement for testing a device provided with an echo canceller
04/12/1983US4380009 Message communication system
04/12/1983CA1144651A1 Echo detector particularly for speech interpolation communication systems
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