Patents
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Patents for H04B 3 - Line transmission systems (31,523)
01/1986
01/29/1986EP0169548A2 Method and apparatus for automatically identifying a responding modem in a multi-drop network
01/28/1986US4567599 Automatic adaptive equalizer having improved reset function
01/21/1986US4566119 Equalizer networks and methods of developing scaling coefficients therefor
01/21/1986US4565974 Optical receiver circuit with active equalizer
01/16/1986WO1986000480A1 Adaptive hybrid circuit
01/15/1986EP0168337A1 Remote control for a winch
01/15/1986EP0167677A1 Signal processing arrangement
01/14/1986US4564952 Compensation of filter symbol interference by adaptive estimation of received symbol sequences
01/14/1986US4564934 Adaptive echo canceller with AGC for transmission systems
01/14/1986CA1199384A1 Information transmission system with modems coupled to a common communication medium
01/08/1986EP0167351A2 Signal multiplexing circuit
01/08/1986EP0167031A2 Case for an electronic emitting and receiving device
01/07/1986US4563679 Carrier control method by using phase-pulse signals
01/07/1986US4563650 Power line communication receiver with dual threshold signal interrogation capability
01/07/1986CA1199102A1 Selective efficiency videofrequency non-linearity correction device
01/07/1986CA1199089A1 Electronic well tools and multi-channel recorder
01/03/1986WO1986000184A1 Telecontrol for hoisting winch
12/1985
12/31/1985US4562401 Circuit arrangement and method for fault locating in conjunction with equipment for the trunk feeding of electrical loads
12/31/1985US4562312 Subsampling delay estimator for an echo canceler
12/17/1985US4559635 Auto-adaptive amplitude-equalizing arrangement for digital radio links
12/17/1985US4559520 Method for communication utilizing multi-mode reception
12/17/1985US4559503 Amplifier for correcting group time delay of electrical signals and an intermediate frequency amplifier stage for radio equipment comprising an amplifier of this kind
12/17/1985US4559499 Direct microwave demodulator of PSK signals with automatic gain control
12/17/1985CA1198236A1 Self-adaptive echo canceller capable of keeping a degree of cancellation substantially invariable even at a low incoming level
12/11/1985EP0164249A2 Communication network having gain adjustment function of a transmission amplifier of medium attachment unit
12/11/1985EP0164159A1 Control device for an echo canceller and a centre clipper
12/11/1985EP0164108A2 Variable switched-capacitor filter capable of changing the filter characteristic thereof
12/10/1985US4558320 Apparatus for the contactless transmission of data or the like between two relatively rotating parts
12/10/1985US4558187 Digital echo-cancellation method and circuit arrangement
12/10/1985US4558185 Subscriber line interface circuit with complex impedance
12/10/1985US4558177 Regulated output current source for cordless telephones
12/04/1985EP0163482A2 Equalizer for frequency independent and dependent transmission loss components with a pilot used for the frequency independent component
12/04/1985EP0163298A2 PCM coder/decoder with two-wire/four-wire conversion
12/03/1985US4556866 Power line carrier FSK data system
12/03/1985US4556865 Data transmission system utilizing power line
12/03/1985US4556864 Apparatus and method for communicating digital information on AC power lines
12/03/1985US4556280 Single cable optical fibre signaling system
12/03/1985CA1197572A1 Automatic and adaptive digital nonlinear decision feedback equalizer
12/03/1985CA1197561A1 Satellite broadcast signal receiving system
11/1985
11/27/1985EP0162200A1 Wideband communication system
11/26/1985US4555788 Multiple rate baseband receiver
11/26/1985US4555660 Current supply device for series-fed electronic circuits
11/26/1985US4555599 Signal transmission devices
11/26/1985US4555596 Loudspeaking telephones
11/26/1985CA1197295A1 Nonintegrating receiver
11/21/1985EP0161944A2 Image suppression mixer of the waveguide type
11/21/1985EP0161900A2 Loopback of a PCM signal
11/21/1985EP0161335A2 Preparation of sampled values of a time-variable signal in a data processing arrangement
11/19/1985US4554532 Automatic receiver gain control in centralized monitor system
11/19/1985US4554417 Tandem adaptive echo canceler arrangement
11/19/1985US4554415 Bilateral amplifier
11/19/1985US4554412 Battery feed system for supplying power to communication circuits
11/19/1985CA1196977A1 Data transmission system via power supply line
11/19/1985CA1196976A1 Loop transmission system and method of controlling the loop-back condition thereof
11/13/1985EP0160819A1 Rough overvoltage protection circuit for a repeater or regenerator
11/12/1985US4553268 Circuit arrangement with a laser diode for transmission of communication signals through a light waveguide
11/12/1985US4553248 Analog adaptive magnitude equalizer
11/12/1985US4553247 Telemetry system with signal booster for digital data transmission through a transmission line
11/06/1985EP0160464A2 Method of and apparatus for determining time origin of timer for modem
11/05/1985CA1196434A1 Digital echo suppressor
10/1985
10/30/1985EP0159916A2 Passive RF signals coupler for power lines
10/29/1985US4550415 Fractionally spaced equalization using nyquist-rate coefficient updating
10/29/1985US4550223 Test device, and method for locating faults in a two-lead line
10/24/1985WO1985004726A1 Tracing electrical conductors by high-frequency constant-energy pulse loading
10/23/1985EP0159142A1 Digital filters
10/22/1985US4549049 Arrangement for testing a device provided with an echo canceller
10/22/1985US4549048 Digital echo canceller
10/22/1985CA1195770A1 Digital agc arrangement
10/22/1985CA1195749A1 Automatic receiver gain control in generalized monitor system
10/22/1985CA1195748A1 Data transmission wired system over building
10/22/1985CA1195747A1 Transmitter/receiver circuit for signal transmission over power wiring
10/22/1985CA1195746A1 Data transmission system utilizing power line of 3- phase alternating current
10/22/1985CA1195745A1 Data transmission system utilizing power line
10/16/1985EP0158089A2 Method for remote power feeding on coaxial cables, and apparatus for carrying out this method
10/15/1985US4547889 Auto-orthogonalizing system of equalization adapted to a range of discrete frequencies and equalizer which activates the system
10/15/1985US4547633 Method of and circuit for locating faults in a digital telecommunication subscriber termination
10/09/1985EP0157704A2 Duplex transmission mechanism for digital telephones
10/09/1985EP0157282A2 Electric power supply circuit capable of reducing a loss of electric power
10/08/1985US4546216 Echo suppressor for improving echo canceler performance
10/08/1985CA1195019A1 Additional line coupling circuit to an intercom telephone set
10/08/1985CA1195018A1 Line circuit
10/08/1985CA1194957A1 Data transmission system utilizing power line
10/08/1985CA1194953A1 Echo phase compensating device and application thereof to echo cancellation devices
10/08/1985CA1194944A1 Adaptive filter update normalization
10/02/1985EP0156753A1 Noise analyzer for digital signal transmisson cables
10/02/1985EP0156693A1 Protective device against electrical perturbations between a terminal and a telephone line
10/02/1985EP0156557A2 Transceiver for multi-drop local area networks
10/02/1985EP0156480A1 Timing control signal generator for teletext signal waveform equalizer
10/02/1985EP0156348A2 Digital bidirectional transmission system with echo-cancellation
10/02/1985EP0156315A2 Circuit for testing the correct operation of a data transmission system
10/01/1985US4545060 Decision feedback adaptive equalizer acting on zero states following a non-zero state
10/01/1985US4544984 Coaxial lightning arresting structure
09/1985
09/25/1985EP0155569A2 Device for matching a bidirectional amplifying circuit arranged in a transmission line with the transmission line
09/24/1985CA1194175A1 Fault tolerant, self-powered data reporting system
09/24/1985CA1194172A1 Method and apparatus for multiple frequency transmission of information in a digital communication system
09/24/1985CA1194167A1 Digital duplex communication system
09/24/1985CA1194166A1 Digital duplex communication system
09/24/1985CA1194165A1 Method of reducing the convergence time of an echo canceller and apparatus for carrying out said method
09/24/1985CA1194138A1 Terminal arrangement for a duplex transmission system
09/17/1985US4542496 Loop transmission system and method of controlling the loop-back condition thereof
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