Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
10/1982
10/05/1982US4352962 Tone responsive disabling circuit
10/05/1982CA1133089A1 Data transmission method
10/05/1982CA1133047A1 Protection circuit for controlling the effect of induced current on line signal repeaters
09/1982
09/30/1982WO1982003299A1 Electric signaling installation comprising at least one transmitter and one receiver
09/28/1982US4352182 Method of and device for testing the quality of digital speech-transmission equipment
09/28/1982US4352075 Split phase delay equalizer with single transformer and adjustment for Q loss
09/28/1982US4351983 Speech detector with variable threshold
09/21/1982US4351060 Automatic, digitally synthesized matching line terminating impedance
09/21/1982CA1132218A1 Automatic equaliser for sychronous digital data transmission
09/21/1982CA1132210A1 Equalizing network
09/21/1982CA1132200A1 Apparatus and method for remote testing of a loop transmission path
09/16/1982WO1982003145A1 Adaptive filter including a far end energy discriminator
09/16/1982WO1982003144A1 Energy band discriminator
09/15/1982EP0060166A1 Convergence control apparatus for digital echo canceller
09/15/1982EP0059967A1 System for the bidirectional simultaneous transmission via a two-wire line for digital telephone
09/15/1982EP0059821A1 Method and apparatus, e.g. in a data distribution system for, inter alia, avoiding distortion in transfer of signal states
09/14/1982US4349889 Non-recursive filter having adjustable step-size for each iteration
09/14/1982US4349795 RF Trap for a cable television trunk amplifier station
09/14/1982US4349707 System for measuring the attenuation on a transmission path
09/14/1982CA1131821A1 Longitudinal balance arrangement for two-to-four telecommunication line circuits
09/14/1982CA1131820A1 Driving point impedance
09/14/1982CA1131819A2 Analog to pseudo-rms value converter for logarithmic encoded echo canceller
09/14/1982CA1131816A1 Digital ring control system for digital multiplexer
09/14/1982CA1131709A1 Electronic loaded/nonloaded telephone loop identification circuit
09/08/1982EP0059294A1 Transmission methods and apparatus for implementing the method
09/07/1982US4348657 Method for transmitting binary signals over a foreign wiring network
09/07/1982US4348582 Communication via an electricity supply main
09/01/1982EP0058754A2 Arrangement for injecting digital signals into a line system
08/1982
08/31/1982US4347615 Transversal equalizers
08/31/1982US4347605 Multiplexed telecommunication systems
08/31/1982US4347407 Electronic telephone circuit
08/31/1982CA1130920A1 Speech detector with variable threshold
08/24/1982US4346267 Hybrid circuit
08/24/1982US4346266 Hybrid circuit
08/18/1982EP0057953A2 Arrangement for correcting pulse distortion in homochronous data transmission
08/17/1982US4345222 Split phase delay equalizer with stray reactance compensation
08/17/1982CA1130027A1 Adaptive electronic hybrid circuit
08/11/1982EP0057417A2 Equipment for supervising the level of a high frequency signal
08/10/1982US4344089 Ghost cancelling system
08/10/1982US4344066 Noise trap arrangement for AC power line communication systems
07/1982
07/28/1982EP0056546A2 Digital adaptive finite impulse response filter with large number of coefficients
07/28/1982EP0056455A1 Information transmission system using audio frequency signals across the electrical power network
07/27/1982US4341927 Data transmission apparatus
07/20/1982US4340880 Method and apparatus for signal recognition in a remote control system with influencing of the zero point transition of the alternating-current mains voltage
07/20/1982US4340875 Transversal filter
07/20/1982CA1128162A1 Remote ac power control with control pulses at the zero crossing of the ac wave
07/20/1982CA1128161A1 Intrusion detector for press brake
07/20/1982CA1128160A1 Sampling clock correction circuit
07/19/1982EP0049276A4 Terminal unit for automatic meter reading system.
07/19/1982EP0048746A4 Automatic meter reading system.
07/13/1982EP0046804A4 Message communication system.
07/13/1982CA1127710A1 Load shedding control means
07/07/1982EP0055279A1 Arrangement for adjusting an adaptive digital balance filter included in a subscriber unit.
06/1982
06/30/1982EP0054811A1 Equalizer for equalizing non-linearly distorted signals
06/30/1982EP0054609A2 Arrangement for adjusting the echo cancellation coefficients at combined adaptive echo cancellation and equalization
06/29/1982CA1126883A1 Echo suppressor circuit
06/29/1982CA1126826A1 Coefficient tap leakage for fractionally-spaced equalizers
06/23/1982EP0054329A1 Echo canceller for telephonic transmission by digital channels using a pseudo-logarithmic coding law
06/22/1982US4336501 Frequency characteristic adjusting circuit
06/16/1982EP0053638A1 Current mode data or power bus
06/16/1982EP0053629A1 Voiceband data set.
06/10/1982WO1982001948A1 Signal filter method and apparatus
06/09/1982EP0053202A1 Improved double talk detector for echo cancellers
06/08/1982US4334128 Echo canceler for homochronous data transmission systems
06/01/1982US4333158 Automatic gain control circuit for an adaptive filter
06/01/1982US4333063 Amplitude equalizer
06/01/1982CA1124821A1 Time-division-multiplexed exchanger
05/1982
05/25/1982US4331842 Voice frequency repeater and term sets and other circuits therefor
05/25/1982CA1124356A1 Regenerator having automatic gain control referenced to a data-pattern-dependent pulse stream
05/25/1982CA1124355A1 Apparatus for coupling a two-way transmission path to a one-way transmitting path and a one-way receiving path
05/25/1982CA1124339A1 Amplitude equalizer circuit
05/18/1982US4330859 Automatic gain control circuit in multi-direction time division multiplex communication system
05/18/1982US4330764 Multipath fade equalizer
05/12/1982EP0051472A1 Single sideband receiver
05/12/1982EP0051141A1 Method and arrangement for equalizing received binary signals
05/11/1982US4329655 Adaptive equalization system for nonlinearities
05/05/1982EP0050748A1 Analog-/digital subscriber's station
05/04/1982US4328590 Single sideband receiver
05/04/1982US4328482 Remote AC power control with control pulses at the zero crossing of the AC wave
05/04/1982CA1123131A1 Transformerless trunk circuit
05/04/1982CA1123056A1 Measuring device for a frequency analysis of signal levels over a wide range of frequencies
04/1982
04/27/1982US4327440 Signal detector for use in digital communication
04/27/1982CA1122653A1 Method and means for powering span lines
04/20/1982CA1122294A1 Power line signalling system
04/14/1982EP0049670A1 Device to minimize far-end crosstalk between lines with digital time-shared transmission
04/14/1982EP0049276A1 Terminal unit for automatic meter reading system.
04/07/1982EP0048979A2 Echo canceller for a long-distance telephone network
04/07/1982EP0048746A1 Automatic meter reading system.
04/06/1982US4323882 Method of, and apparatus for, inserting carrier frequency signal information onto distribution transformer primary winding
03/1982
03/31/1982EP0048515A1 Digital echo canceller comprising an analog to digital converter with adjustable volume range
03/30/1982US4322811 Clamping circuit for an adaptive filter
03/29/1982EP0040217A4 Apparatus for and method of processing data signals.
03/23/1982US4321686 Correction processor of self-adaptive filters
03/23/1982US4321581 Powerline carrier control system
03/23/1982US4321431 Trunk circuit with single coupling transformer
03/17/1982EP0047590A2 Method of and apparatus for echo detection in voice channel signals
03/17/1982EP0047589A1 Method and apparatus for detecting speech in a voice channel signal
03/16/1982US4320498 Auto balancing duplexer for communication lines
03/16/1982US4320348 Variable level converter
03/16/1982US4320257 Compensation of transmission losses in a telephone system
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