Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 25 - Baseband systems
Patents for H04L 25 - Baseband systems (55,083)
12/1989
12/12/1989US4887261 Method and arrangement for transmitting a digital signal with a low bit rate in a time section, provided for higher bit rates, of a time division multiplexed signal
12/12/1989US4887083 Bipolar with eight-zeros substitution and bipolar with six-zeros substitution coding circuit
12/06/1989EP0344751A2 Code violation detection circuit for use in AMI signal transmission
12/06/1989EP0344678A2 Modulating device for a digital radio communications system
12/06/1989EP0344615A2 Digital 2B1Q transmitter with high precision and linearity time domain response
12/06/1989EP0344402A2 Method for the transmission of data by means of optical waveguides
12/05/1989US4885795 Hospital digital data transfer system
12/05/1989US4885758 Speed correction and stop bit control circuit for data communications device
12/05/1989US4885757 Digital adaptive receiver employing maximum-likelihood sequence estimation with neural networks
12/05/1989US4885718 Extended communications link for keyboard and display units remotely located from a computer
11/1989
11/30/1989DE3817327A1 Method and circuit for affecting the spectrum of digital data signals modulated onto a carrier
11/29/1989EP0344036A1 Method and device for transmitting digital information between various CSMA/CD stations
11/29/1989EP0343929A2 Digital signal decoding apparatus
11/29/1989EP0343670A2 Data demodulation apparatus
11/29/1989EP0343305A1 Bit rate adaptation system for digital transmission systems
11/29/1989EP0343273A1 Correction circuit for a pair of digital quadrature signals
11/28/1989US4884074 Method and apparatus for encoding and decoding binary information
11/23/1989EP0342736A1 Phase-locked-loop cicuit and bit-detection arrangement comprising such a phase-locked-loop circuit
11/21/1989US4882749 Control of signal transmission
11/21/1989US4882737 Signal transmission method
11/21/1989US4882726 Full duplex modem system for differing data bit rates
11/15/1989EP0342010A2 Digital signal regenerator
11/14/1989US4881059 Manchester code receiver
11/14/1989US4881041 Pulse width distortion correction circuit
11/14/1989CA1262939A1 Method of and apparatus for detecting minimum bit number of received data
11/07/1989US4879730 Jitter tolerant circuit for dual rail data
11/07/1989US4879729 Apparatus for the decoding coded frequency modulated signals
11/07/1989US4879727 Adaptive threshold sampling controller
11/07/1989US4879661 Bi-directional circuit to interface between a low current device and high current tester
11/07/1989US4879540 Data exchanging system using a bar code reader
11/07/1989EP0328569A4 Data transmission using switched resonance.
11/02/1989EP0339349A2 System and circuits for the minimum mean square error method applied to the transmission of digital signals
11/02/1989EP0339045A1 Data limiter with current controlled response time.
10/1989
10/31/1989US4877980 Time variant drive circuit for high speed bus driver to limit oscillations or ringing on a bus
10/25/1989EP0338881A1 Method and device for reconfigurating a signal in a differential information transmission network, especially in an automobile
10/24/1989US4876695 Digital data transmission system having additional bits for auxiliary data
10/19/1989WO1989010027A1 Variable rate rectangular matched filter
10/18/1989EP0337762A2 Communication system equipped with an AC coupling receiver circuit
10/18/1989EP0337545A1 Apparatus for measurement and cancellation of distortion of binary signals of the type not comprising DC spectral components
10/17/1989US4875223 Twisted pair adapter
10/17/1989US4875112 Compound pulse dimming circuitry for conditioning readback signals
10/17/1989EP0289526A4 Adaptive threshold sampling method.
10/10/1989US4873702 Method and apparatus for DC restoration in digital receivers
10/10/1989US4873700 Auto-threshold/adaptive equalizer
10/10/1989US4873524 Decoding unit for CMI-encoded signals
10/10/1989CA1262271A1 Method and device for data transmission over several parallel lines, in particular optical fiber
10/05/1989WO1989009523A1 A method and apparatus for stabilized data transmission
10/05/1989DE3810400A1 Cell former in an asynchronous time division multiplex system
10/05/1989DE3809485A1 Interface circuit
10/04/1989EP0335797A1 Method and apparatus to synchronise by reception of a local clock belonging to a communication network, in particular of a transport vehicle
10/04/1989EP0335547A2 A metastable prevention circuit
10/03/1989US4872186 Apparatus and method for identification of message initiation in a process control network
10/03/1989US4872184 Digital automatic line equalizer with means for controlling tap gains of transversal filter based on mean power of output from the filter
09/1989
09/27/1989EP0334587A2 Signal processing system
09/27/1989EP0334549A2 Method and apparatus for wideband transmission of digital signals between a telephone central office and customer premises
09/27/1989EP0333817A1 Adapter between coaxial cable and twisted pair cables
09/26/1989US4870657 Data signal transmission system using decision feedback equalization
09/26/1989US4870414 Even mark modulation coding method
09/26/1989CA1261473A1 Signal generation
09/26/1989CA1261008A1 Adaptive transversal filter
09/26/1989CA1260643A1 Control of signal transmission
09/26/1989CA1260573A1 Low power line driving digital transmission system
09/26/1989CA1260558A1 Bus transceiver including circuit for compensation of component variation
09/26/1989CA1260556A1 Quaternary signal regenerator
09/20/1989EP0333491A2 An adaptive signal discrimination circuit and a method for discriminating high and low level of data signals
09/20/1989EP0333324A2 Matched spectral null trellis codes for partial response channels
09/20/1989EP0333322A2 Input coding for partial response channels
09/20/1989EP0333321A2 Even mark modulation coding
09/19/1989US4868850 MODEM communication system having training means and method for training same
09/19/1989US4868831 Zero byte time slot interchange (ZBTSI) encoder
09/19/1989US4868569 Biphase digital look-ahead demodulating method and apparatus
09/19/1989CA1259658A1 Radio data transmission system
09/14/1989DE3806983A1 Circuit arrangement for producing voltages with different polarity
09/13/1989EP0332302A2 Phase perturbation compensation system
09/13/1989EP0332301A2 Time variant drive for use in integrated circuits
09/13/1989EP0332290A2 Equaliser for radio receiver
09/13/1989EP0332097A2 Data bus for motor vehicles
09/12/1989US4866738 Circuit and method for deriving the word timing of a pulse position modulated signal
09/12/1989US4866736 Data transmission system comprising a decision feedback equalizer and using partial-response techniques
09/08/1989WO1989008364A1 Digital data over voice communication
09/08/1989WO1989008360A1 An adaptive detection method for quantized signals
09/06/1989EP0331573A1 Pulse burst transmitter
09/06/1989EP0331115A2 Scrambling/descrambling method using a memory for storing initial pseudo-random bit patterns respectively for submultiframes
09/05/1989US4864617 System and method for reducing deadlock conditions caused by repeated transmission of data sequences equivalent to those used for inter-device signalling
09/05/1989US4864612 Method of avoiding accidental actuation of maintenance equipment in a communications network
09/05/1989US4864590 Apparatus and method for noise reduction in a digital line receiver
09/05/1989US4864567 High throughput data communication system
09/05/1989US4864403 Adaptive television ghost cancellation system including filter circuitry with non-integer sample delay
09/05/1989US4864303 Encoder/decoder system and methodology utilizing conservative coding with block delimiters, for serial communication
08/1989
08/30/1989EP0330177A2 Circuit for generating discrimination level voltage
08/29/1989US4862483 Channel estimation and detection for digital communication systems
08/29/1989US4862481 Signal transmission process
08/29/1989US4862480 Digital data service system
08/29/1989US4862404 Digital circuit for suppressing fast signal variations
08/24/1989DE3804332A1 Circuit arrangement for the transition from four-wire mode to two-wire mode in electrical communications systems
08/23/1989EP0329514A1 Connecting interface for an information transmission system, e.g. for an automotive vehicle
08/23/1989EP0329158A2 Method for the digital and/or analog coding of the information of one, two or several channels, and/or frequency or bandwidth reduction, and/or increase of the transmission security
08/23/1989EP0328569A1 Data transmission using switched resonance
08/22/1989US4860321 Lock detector for feedback loops
08/22/1989US4860317 Noise-reduction signal processing arrangement
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