Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
10/1990
10/23/1990CA1275463C2 Multipurpose digital integrated circuit for communication and control network
10/18/1990WO1990012463A1 Spread spectrum-time diversity communications systems and transceivers for multidrop local area networks
10/17/1990EP0392246A2 Monitoring and control system for digital information transmission systems with master and substitution master
10/17/1990EP0392245A2 Automatic addressing of monitoring and/or control processing units comprised in a digital information transmission system
10/16/1990US4964118 Apparatus and method for echo cancellation
10/16/1990US4963853 Simultaneous inbound multi-channel communication system using electricity distribution network
10/16/1990CA1275335C Echo suppressor
10/10/1990EP0391715A2 Echo canceller
10/10/1990EP0391312A2 System for and method of determining cable characteristics
10/10/1990EP0390978A1 Communication system with a two-wire serial backbone bus for connecting bridges to secondary three-wire buses
10/09/1990USRE33380 Voiceband data set
10/09/1990US4962496 Transmission of data via power lines
10/04/1990WO1990011577A1 Pattern recognition
10/04/1990DE3934007A1 Zweidraht-fernmesseinrichtung Two wire remote measuring device
10/02/1990US4961218 Enhanced line powered amplifier
10/02/1990US4961057 Automatic gain control amplifier for compensating cable loss
09/1990
09/28/1990CA2013170A1 Electronic device including a plurality of unit circuits mounted on respective printed circuit boards
09/26/1990EP0389341A1 Transmission line compensating apparatus for teledistribution network
09/26/1990EP0388672A1 Method of data packet transfer
09/26/1990EP0388493A1 Digital echo canceller for full-duplex modem with frequency offset tracking
09/26/1990EP0388441A1 Apparatus and Method for a secure and diagnosable Antijabber Communication.
09/25/1990US4959650 Dual channel A/D and D/A converter with improved isolations
09/25/1990CA1274595A1 Signal receiver
09/25/1990CA1274594A1 Arrangement for full-duplex data transmission over two-wire circuits
09/21/1990CA2012629A1 Process for transferring data packets
09/19/1990EP0387948A1 Adaptive predistortion circuit with memory
09/19/1990EP0267930A4 Power line communication apparatus
09/14/1990CA2011837A1 Adaptive predistortion circuit with a memory
09/12/1990EP0386659A2 Circuit for transmitting binary signals and energy over a line
09/11/1990US4956838 Echo cancelling device with frequency sub-band filtering
09/11/1990US4956747 For controlling equipment
09/05/1990EP0385270A2 Surge protector
09/05/1990EP0385126A2 In-service monitoring and/or control apparatus for transmission devices of the electrical information transmission technique
09/04/1990US4954795 Surface acoustic wave filter for suppressing surface to surface interference for a satellite communication receiver
09/04/1990CA1273698A1 Submarine repeater box
09/01/1990CA2011170A1 Surge protector
08/1990
08/29/1990EP0384490A2 Echo canceller having FIR and IIR filters for cancelling long tail echoes
08/29/1990EP0384448A2 Digital filter
08/29/1990EP0384447A2 Digital filter
08/29/1990EP0247118B1 Interface circuit
08/28/1990US4953206 Methods of and apparatus for providing substantially error-free transmitted data
08/28/1990US4952905 Data communication system
08/28/1990CA1273401A1 Furnicular ropeway transmitting informations on the cable
08/23/1990WO1990009703A1 Amplifier arrangement and communication line circuit using same
08/22/1990EP0383360A2 Adaptive recognising device
08/21/1990US4951312 Balanced transmission device
08/21/1990US4951269 Echo canceller with short processing delay and decreased multiplication number
08/21/1990CA1273075A1 Echo canceller with dynamically positioned adaptive filter taps
08/21/1990CA1273070A2 High speed data bus structure and system
08/16/1990EP0382697A2 Control voltage generator in a transmitter arrangement for digitally modulated signals
08/09/1990WO1990009065A1 Multiplexed synchronous/asynchronous data bus
08/08/1990EP0381565A1 Method of transmitting commands or information, and device for carrying out the method
08/07/1990US4947483 Process for transmission of analog and/or digital information, especially with an in-line arrangement of one, two or more exchanges in telecommunications systems
08/07/1990US4947425 Echo measurement arrangement
08/07/1990US4947386 Fixed gain fixed loss amplification system
08/02/1990DE3902922A1 Audio-frequency (AF) interface field
08/01/1990EP0380187A2 Detection system
08/01/1990EP0380167A1 Adaptive predistortion circuit
08/01/1990EP0379902A1 Inductively coupled data-processing apparatus
08/01/1990EP0379901A1 Data-processing apparatus
08/01/1990CA2008947A1 Method for the transmission of data or commands and device for carrying out said method
07/1990
07/31/1990USRE33281 Cable analyzer with d.c. functions
07/31/1990US4945533 Method and apparatus for transmitting data
07/31/1990US4945311 Electronically variable equalizer
07/31/1990CA1272263A1 Energy management system
07/25/1990EP0379375A2 Parallel mode adaptive transversal equalizer for high-speed digital communications system
07/25/1990EP0378695A1 An initial training apparatus for use in a transmitter and receiver apparatus.
07/25/1990CN2059576U Separated type electrocardiogram machine capable of transmitting by telephone network
07/24/1990US4943739 Non-reflecting transmission line termination
07/24/1990CA2008131A1 Adaptive predistortion circuit
07/17/1990US4942603 Methods and apparatus for providing reciprocal impedance conversion
07/11/1990EP0377551A2 Outbound detector system and method
07/11/1990EP0377300A2 Transversal and recursive filters
07/11/1990EP0219537B1 Method and apparatus for adjusting a digital equalizing filter in simultaneous adaptive echo elimination and adaptive elimination of noise caused by intersymbol interference
07/10/1990US4939939 Apparatus for measuring a traction force by means of a traction dynamometer
07/10/1990CA1271530A1 Adaptive digital filter
07/04/1990EP0376250A1 Self-adaptive equalization device for a differentially coherent demodulation arrangement
07/03/1990CA1271233A1 Driver circuit
06/1990
06/28/1990WO1990007235A1 Cable systems or the like
06/27/1990EP0375015A2 Method and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics
06/27/1990EP0374427A1 Microwave device for the correction of the group propagation time
06/27/1990CN1043394A Computerized pulse remote-detector for line failure
06/27/1990CN1008584B Adaptive equalizer
06/26/1990US4937813 System for cancelling echo signals
06/26/1990US4937464 Modular jack with loop testing switch
06/20/1990EP0373552A1 Method for measuring the signature of a digital transmission equipment, and device for carrying out the method
06/20/1990CN1043236A Digital automatic gain control
06/19/1990US4935919 Full duplex modem having two echo cancellers for a near end echo and a far end echo
06/19/1990US4934983 Data communication system having level control means
06/15/1990CA2005594A1 Method and device for measuring the signature of a digital transmission equipment
06/14/1990WO1990006649A1 Telephone circuits
06/14/1990WO1990006644A1 Digital automatic gain control
06/14/1990WO1990006639A1 Device for transmission of information through a three-phase power line
06/14/1990WO1990006638A1 Device for transmission of information through a three-phase power line
06/14/1990WO1990006637A1 Adaptive rate control for echo cancelling modem
06/13/1990DE3939188A1 Bus coupler for power-circuit control data transmission - includes transformer for galvanic isolation of AC control signals from DC power supply on three wires
06/13/1990CN2058288U Transmitter and receiver for powerline carrier broadcasting
06/13/1990CA2005408A1 Cable systems and the like
06/12/1990US4933891 Method and circuit configuration for generating filter coefficients
06/12/1990US4933647 AGC circuit
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