Patents
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Patents for H04B 3 - Line transmission systems (31,523)
12/1984
12/04/1984CA1179054A1 Signal gain control with dc compensation
11/1984
11/28/1984EP0126301A2 Adaptive equalizer for digital signals
11/27/1984CA1178731A1 Echo canceller for a long-distance telephone network
11/27/1984CA1178666A1 Adaptive equalizer
11/21/1984EP0125984A1 Method of reshaping a distorted digital signal and arrangement for carrying out said method
11/21/1984EP0125723A1 Carrier frequency equalizing apparatus controlled by base-band signals
11/21/1984EP0125722A1 Circuit for joint adaptive equalisation and demodulation
11/21/1984EP0125649A1 Automatic equalizer
11/20/1984US4484336 Digital transmission systems
11/20/1984US4484322 Circuit arrangement for suppressing outgoing-signal noises in system for bidirectional transmission of digitized signals over two-wire line
11/20/1984US4484032 Active impedance transformer assisted line feed circuit
11/20/1984CA1178386A1 Active impedance transformer assisted line feed circuit
11/20/1984CA1178385A1 Adaptive echo cancelling circuit for use in a long- distance telephone network
11/20/1984CA1178354A1 Power line communication system using the neutral and ground conductors of a residential branch circuit
11/13/1984CA1177986A1 Balanced current multiplier circuit for a subscriber loop interface circuit
11/13/1984CA1177985A1 Electronic terminator circuit
11/13/1984CA1177929A1 Distribution network communication system
11/13/1984CA1177928A1 Three-phase power distribution network communication system
11/13/1984CA1177927A1 Load management terminal
11/13/1984CA1177893A1 Digital modem transmitter
11/07/1984EP0124260A2 Power supply line carrier communication systems
11/07/1984EP0124030A1 Power supply for series fed electronic circuits
11/07/1984EP0123804A1 Power amplifier circuit
11/07/1984EP0123803A2 Interference reduction characteristics circuit
11/06/1984US4481645 Linear distortion canceller circuit
11/06/1984US4481622 High speed dial-up telephone circuit full duplex data transmission techniques
11/06/1984US4481501 Transformer arrangement for coupling a communication signal to a three-phase power line
11/06/1984US4481385 Arrangement for cancelling echo signals
11/06/1984CA1177587A1 Method and device for detecting data signals and signalling signals in a telephone channel
11/06/1984CA1177557A1 Power line communication over ground and neutral conductors of plural residential branch circuits
10/1984
10/31/1984EP0123278A1 Digital wave filter with bridged digital wave filters
10/31/1984EP0122939A1 An active delay equalizer section having independently tunable circuite parameters and a circuit and method for correcting for phase distortion in a digital audio system
10/30/1984US4480204 Apparatus for the contactless and brushless transmission of measuring and control signals
10/30/1984US4480156 Echo canceller system
10/24/1984EP0122637A2 Automatic adaptive equalizer
10/24/1984EP0122594A2 Line circuit with echo compensation
10/24/1984EP0092569B1 A fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
10/23/1984US4479215 Power-line carrier communications system with interference avoidance capability
10/23/1984US4479036 Echo control system
10/23/1984US4479033 Telephone extension system utilizing power line carrier signals
10/23/1984CA1176719A1 Switched-capacitor variable equalizer
10/17/1984EP0121557A1 Adaptive filter including controlled tap gain coefficient drift.
10/16/1984US4477913 Automatic equalizer apparatus
10/11/1984WO1984004010A1 Status monitor
10/10/1984EP0121389A2 Apparatus and method for adjusting the receivers of data transmission channels
10/10/1984EP0120959A1 Telephone extension system
10/09/1984US4476561 Device for remotely supervising operation of a branched data-transmission network
10/09/1984US4476539 Transversal type smear-desmear filter
10/09/1984US4476438 Multiplier circuit including amplifier with drift compensation circuit
10/03/1984EP0120786A1 Microwave reception chain having a direct microwave demodulation device
10/03/1984EP0120416A1 Demodulator with automatic gain control circuit
10/03/1984EP0119999A1 Cash flow monitoring system
10/02/1984US4475209 Regenerator for an intrabundle power-line communication system
10/02/1984US4475193 Power line carrier multi telephone extension system for full duplex conferencing between telephones
10/02/1984CA1175523A1 Voiceband data set
10/02/1984CA1175522A1 Adaptive system in a digital data receiver providing compensation for amplitude and phase distortions introduced by a data transmission channel
10/02/1984CA1175521A1 Echo cancellation in two-wire full-duplex data transmission with estimation of far-end data components
09/1984
09/26/1984EP0119552A1 Circuit device for the automatic closing of a remote supply loop
09/26/1984EP0119290A1 Three-stage single-side band premodulated frequency carrier system
09/25/1984US4473817 Coupling power line communications signals around distribution transformers
09/25/1984US4473816 Communications signal bypass around power line transformer
09/25/1984CA1175124A2 Voiceband data set
09/25/1984CA1175114A1 Transversal type smear-desmear filter
09/19/1984EP0118879A1 Remote supply unit for a DC series supply device
09/19/1984EP0118799A2 Power amplifier circuit
09/19/1984EP0118545A1 Pulse width modulated telephone line interface
09/19/1984EP0118522A1 Process for maintaining in service coaxial multichannel installations by a transmission network which is remotely supplied and comprised of symmetric cables, and transmission chain for implementing such process.
09/18/1984US4472812 Kalman equalizer
09/18/1984US4472733 Color channel signal-to-noise improvement in digital television
09/18/1984CA1174745A1 Interference cancellation method and apparatus
09/11/1984US4471399 Power-line baseband communication system
09/11/1984US4470685 Photographic system
09/11/1984CA1174302A1 Low power digital bus
09/11/1984CA1174087A1 Overhead electric transmission systems
09/05/1984EP0117596A1 Method of reducing the convergence time of an echo canceller, and device for performing this method
09/04/1984US4469916 Method and apparatus for detecting signalling and data signals on a telephone channel
09/04/1984CA1173943A1 Semiconductor crosspoint linearizing arrangement
09/04/1984CA1173927A1 Communication system and method
08/1984
08/30/1984WO1984003407A1 Speakerphone control circuit
08/29/1984EP0116990A1 Autoadaptive amplitude equalizing apparatus for digital microwave links
08/29/1984EP0116968A1 Adaptive echo canceller
08/28/1984US4468785 Telemetry system with signal booster for digital data transmission through a transmission line
08/28/1984US4468641 Adaptive filter update normalization
08/28/1984US4468627 RIAA Equalizer circuit
08/22/1984EP0116387A1 Method of initializing the filter coefficients in a compensation device for near and far echoes, and device for performing this method
08/21/1984US4467472 Diplexer for the separation of a signal and of a supply current
08/21/1984US4467441 Adaptive filter including controlled tap coefficient leakage
08/21/1984US4467314 Electric utility communication system with field installation terminal and load management terminal with remotely assignable unique address
08/21/1984US4467148 Telephone line analyzer
08/21/1984US4467146 For a telephone circuit
08/21/1984CA1173128A1 Echo cancellation using transversal filters
08/16/1984WO1984003191A1 Borsht/slic auto balancing technique
08/15/1984EP0115894A1 TDM loop telecommunication system comprising a first and a second transmission line
08/15/1984EP0115815A1 Circuit arrangement for transmission of audio-frequency signals over a power transformer
08/15/1984EP0115814A1 Arrangement for feeding audio frequency signals into a power distribution network
08/15/1984EP0115766A1 Negative feedback broad band amplifier incorporating two negative feedback amplifiers
08/14/1984US4466134 Intermediate frequency slope compensation control arrangements
08/07/1984US4464782 Transmission process and device for implementing the so-improved process
08/07/1984US4464746 Arrangement for correcting pulse distortion in homochronous data transmission
08/07/1984US4464545 Echo canceller
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