Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
04/1983
04/06/1983EP0075914A1 Subscriber line circuit comprising a controllable DC/DC converter as a battery feed circuit
04/05/1983CA1144257A1 Coherent phase shift keyed demodulator for power line communication systems
03/1983
03/31/1983WO1983001163A1 Balanced current multiplier circuit for a subscriber loop interface circuit
03/31/1983WO1983001162A1 Electronic terminator circuit
03/29/1983US4378535 Adaptive equalizer for short distance metallic circuits
03/29/1983US4378533 Modulator for injecting signals into a polyphase power transmission system
03/29/1983US4378472 Two to four wire hybrid circuit arrangement for a pulse code modulated time multiplex telecommunication system
03/29/1983CA1143811A1 Apparatus for transmitting information on an a.c. line
03/29/1983CA1143804A1 Wide range data cable equalizer
03/22/1983US4377858 Digital two-to-four wire converter for full duplex signals
03/22/1983US4377804 Synchronous data transmission system utilizing AC power line
03/22/1983US4377793 Digital adaptive finite impulse response filter with large number of coefficients
03/22/1983CA1143440A1 Adaptive filter with tap coefficient leakage
03/16/1983EP0074089A1 Digital bit rate synchronizer for digital echo cancellers and similar signal processing devices
03/16/1983EP0073903A2 Arrangement for the contactless information transmission between bodies rotating relatively to one another
03/16/1983EP0073884A1 Adjustable equalizer
03/16/1983EP0073869A1 Data receiving apparatus with listener echo canceller
03/16/1983EP0073776A1 Electric signalling installation comprising at least one transmitter and one receiver.
03/08/1983US4376288 Signal gain control with DC compensation
03/08/1983CA1142578A1 Power transmission overhead line
03/03/1983WO1983000784A1 Adaptive equalizer
03/02/1983EP0073039A1 Equalizer having a substantially constant gain at a preselected frequency
02/1983
02/23/1983EP0072721A1 System for the localization of loops and interruptions in a two-wire line
02/23/1983EP0072542A2 Adaptive equalizer
02/23/1983EP0072479A2 Apparatus for compensating amplitude and phase distortions in a common-wave radio system
02/22/1983CA1141831A1 Composite video automatic gain control amplifier
02/17/1983WO1983000592A1 Semiconductor crosspoint linearizing arrangement
02/15/1983CA1141443A1 Circuit for controlling the weighting coefficients in an analog adaptive equalizer
02/09/1983EP0071192A1 System for baseband digital transmission in both directions on a two-wire line
02/08/1983US4373121 Maintenance termination device
02/01/1983US4371867 Transmitting signals over alternating current power networks
02/01/1983CA1140692A2 Adaptive electronic hybrid circuit
02/01/1983CA1140634A1 Method and apparatus for transmitting data across a two-wire line
01/1983
01/26/1983EP0070733A1 Overhead electric transmission systems
01/25/1983US4370741 Process and an apparatus for transmitting data across a two-wire line
01/25/1983US4370624 Low noise amplifier circuit with reduced low-frequency gain
01/20/1983WO1983000266A1 Data signal echo canceller
01/19/1983EP0070236A1 Echo phase compensation apparatus and its application to echo cancellers
01/18/1983US4369523 Remote control system of an optical repeater
01/18/1983US4369416 Band-stop filter for equipment with carrier-frequency utilization of low-voltage lines
01/18/1983CA1139861A1 Method an apparatus for signal recognition in a remote control system with influencing of the zero point transition alternating mains voltage
01/12/1983EP0069595A2 Data transmission over long distance circuits
01/11/1983US4368362 Automatic telephone loaded/nonloaded facility type identification circuit
01/11/1983US4368360 Adaptive control type echo suppressor
01/11/1983CA1139449A2 Data communication system with dedicated and back-up lines
01/04/1983US4367415 Pulse generator circuit
12/1982
12/23/1982WO1982004512A1 Signal booster for digital data transmision through transmission lines
12/22/1982EP0067614A1 Joint between the optical fibres of the conductors of an overhead electric transmission system
12/22/1982EP0067378A2 Constrained adaptive equalizer
12/21/1982US4365286 Audio-frequency powerline carrier control system with a current supervisory device
12/21/1982US4365238 Visual signalling apparatus
12/21/1982US4365119 Automatically adjustable bidirectional-to-unidirectional transmission network
12/21/1982CA1138138A1 Line circuit
12/15/1982EP0067027A1 Digital repeater circuit
12/14/1982US4363938 Method of and apparatus for echo detection in voice channel signals
12/14/1982CA1137665A1 Self-adjusting hybrid network
12/14/1982CA1137590A1 Two wire current transmitter with improved voltage regulator
12/14/1982CA1137579A1 Transmission system for the transmission of data pulses
12/08/1982EP0066010A1 Cross-over network for the separation of a signal current and a supply current
12/08/1982EP0066006A2 Arrangement for compensating crosstalk and/or echoes
12/07/1982US4362952 Apparatus and method for initiation of reciprocal remote feeding of intermediate stations of a communication installation
12/07/1982US4362909 Echo canceler with high-pass filter
12/07/1982CA1137180A1 Circuit arrangement for automatic distortion correction of a signal
12/01/1982EP0065796A1 Arrangement for cancelling echo signals
11/1982
11/30/1982CA1136727A1 Transformer arrangement for coupling a communication signal to a three-phase power line
11/24/1982EP0065335A1 Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device
11/24/1982EP0065210A2 Electrical signal conditioning method with a digital filter device
11/23/1982US4360713 Echo detector particularly for speech interpolation communication systems
11/23/1982US4360712 Double talk detector for echo cancellers
11/23/1982CA1136299A1 Multiplexed carrier transmission through harmonic polluted medium
11/23/1982CA1136229A1 Electronic hybrid
11/23/1982CA1136220A1 Carrier transmission through harmonic polluted means
11/16/1982US4359778 Channel equalizer and method for cancelling ghosts
11/16/1982US4359644 Load shedding control means
11/10/1982EP0064431A1 Non-linearity video frequency correction device with selective efficiency
11/10/1982EP0064201A1 Method for the equalization of a data signal
11/09/1982US4358853 Digital modem transmitter
11/09/1982US4358790 Electrical data pulse slicing
11/09/1982US4358644 Bilateral current source for a multi-terminal intercom
11/09/1982CA1135430A1 Automatic equalization for digital transmission systems
11/09/1982CA1135362A1 Remote monitoring system for remote locating and gain regulating of amplification circuits in data transmission line
11/08/1982EP0053629A4 Voiceband data set.
11/03/1982EP0063638A2 Digital telecommunication system
11/02/1982US4357605 Cash flow monitoring system
11/02/1982US4357598 Three-phase power distribution network communication system
11/02/1982US4357545 Remote power supply system for equipment on a transmission line
11/02/1982US4357494 Impedance canceller circuit
11/02/1982CA1134916A1 Automatic equalizer
11/02/1982CA1134915A1 Noise assessment of pcm regenerators
10/1982
10/27/1982EP0063502A1 Arrangement for locating faults in a two-wire line
10/27/1982EP0063296A1 Three-phase power distribution network communication system
10/26/1982US4356460 Split phase delay equalizer with reduced insertion loss
10/26/1982CA1134461A1 Waveform correction circuit
10/26/1982CA1134459A1 Synchronization of a data communication receiver with a received signal
10/20/1982EP0062871A1 Load management terminal
10/20/1982EP0062870A1 Distribution network communication system
10/19/1982US4355406 Carrier detector in a modem provided with an echo canceler
10/19/1982US4355303 Receiver for a distribution network power line carrier communication system
10/19/1982US4355214 Adaptive echo canceller for full-duplex transmission of data
10/12/1982US4354160 Amplitude equalizer
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