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)
12/1990
12/11/1990CA1277743C Broadband digital transmission systems
12/06/1990DE3918551A1 Verfahren zur analogen uebertragung bzw. speicherung einer digitalen information A method for analog transmission and storage of digital information
12/06/1990DE3918263A1 Plesiochronous digital sequence stuffing clock signal extn. method - using bistable counter driven by delayed system clock which is ineffective during active control signal
12/06/1990DE3917433A1 Parallel data and clock signal interface for synchronisation - produces clock signal for further processing from divider clocked at integral multiple of data clock frequency
12/06/1990DE3917432A1 Parallel bit stream interface with automatic clock phasing - produces clock signals for further processing by division of integral multiple of input bit stream frequency
12/05/1990EP0400908A2 Line Driver
12/05/1990EP0400854A2 Data centering method and apparatus
12/05/1990EP0400730A2 Zero crossing detector arrangements
12/05/1990EP0400551A2 Coded transmission system with initializing sequence
12/05/1990CN1010733B Adaptive blind equalization method and device
12/04/1990WO1990015494A1 Process for analog transmission or storage of digital data
12/04/1990US4975927 Demodulator with composite transversal equalizer and eye detection clock synchronizer
12/04/1990US4975916 Character snychronization
12/04/1990CA2060893A1 Process for analog transmission or storage of digital data
12/04/1990CA1277381C2 Multipurpose digital integrated circuit for communication and control network
11/1990
11/28/1990EP0399153A1 Regenerator for digital signals
11/28/1990CN1010647B High-speed digital loop transceiver
11/27/1990WO1990014727A1 Centering multi-level data
11/27/1990CA2055470A1 Centering multi-level data
11/27/1990CA1277051C Methods of and system for providing substantially error-free transmitted data
11/27/1990CA1277000C Data transmission system comprising smearing filters
11/27/1990CA1276990C Switched threshold comparator for a fiber-optic receiver
11/27/1990CA1276989C Flexible regenerator
11/20/1990US4972517 Driver circuit receiving input voltage and providing corresponding output voltage
11/20/1990US4972439 Active signalling transmitter control
11/20/1990US4972433 Receiver capable of improving signal-to-noise ratio in reproducing digital signal
11/20/1990CA1276690C Pulse shaper
11/15/1990WO1990013958A1 Receiver for quadraphase modulation signals
11/15/1990DE3915258A1 Data bus capacitive load reducing circuit - uses variable resistor of low capacity w.r.t. bus driver as switching element
11/14/1990EP0397537A2 Mapping digital data sequences for data transmission
11/14/1990EP0397536A2 Apparatus for generating sequences of digital signals
11/14/1990EP0397384A1 Sequence synchronisation
11/14/1990EP0397079A2 Parallel pseudo-random generator for emulating a serial pseudo-random generator and method for carrying out same
11/13/1990US4970419 Low-noise transmission line termination circuitry
11/13/1990CA1276309C Enhanced distance data transmission system
11/13/1990CA1276252C Telecommunication system with means to maintain unchanged in bus-connecting station transformers the core magnetization at instant of pulse termination
11/13/1990CA1276246C Digital automatic line equalizer for communication system
11/12/1990CA2016635A1 Parallel pseudo-random generator for emulating a serial pseudo-random generator and method for carrying out same
11/12/1990CA2014867A1 Generalized partial response channel signaling systems
11/07/1990EP0396461A1 Device for synchronising a pseudo-binary signal with a phase-hopped regenerated clock signal
11/06/1990US4969162 Polled data network auto-equalizer system and method
11/06/1990US4968902 Unstable data recognition circuit for dual threshold synchronous data
11/01/1990WO1990013187A1 Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels
10/1990
10/31/1990CN1010270B Duobinary encoded signal decoder
10/30/1990US4967390 Bus driving and decoding circuit
10/30/1990US4967389 Bit density controller
10/30/1990US4967104 Circuit for increasing the output impedance of an amplifier
10/25/1990DE3911818A1 Level regulation circuit for signal discriminator - uses selected bits or binary signal provided by discriminator to provide reference voltage signal
10/24/1990EP0393952A2 Apparatus and method for proper decoding in an encoder/decoder
10/24/1990EP0393282A2 Signal conditioning circuits
10/23/1990US4965883 Method and apparatus for transmitting and receiving characters using a balanced weight error correcting code
10/23/1990US4965881 Linear feedback shift registers for data scrambling
10/23/1990US4965867 Offset compensation circuit
10/23/1990US4965575 Data alignment circuit and method for self-clocking encoded data
10/23/1990US4965536 Quadrature amplitude modulation system using digital filters
10/18/1990WO1990012467A1 A method in the transmission of a digital broadband signal
10/18/1990WO1990012380A1 Error correction for infrared data communication
10/18/1990DE3912162A1 Integrated bus system for supply voltage and information signals - has supply voltage modulated with information signals prior to transmission
10/17/1990EP0392653A2 High speed asynchronous data interface
10/17/1990EP0392603A2 Transmission system
10/17/1990EP0392229A2 Circuit for the compensation of an offset voltage and application of this circuit
10/17/1990CN1046251A Method and apparatus for reducing noise on signal encodable on plurality of predetermined levels
10/16/1990US4964140 Digital differential signal transmission apparatus
10/16/1990US4964116 DS3 - line interface linear array (lila)
10/16/1990US4963868 Frame synchronizing method and system
10/10/1990EP0391571A2 Driver-receiver pair for low noise digital signaling
10/10/1990EP0391354A2 Method of generalizing the Viterbi-algorithm and apparatus to carry out the method
10/10/1990EP0391312A2 System for and method of determining cable characteristics
10/10/1990CN1046057A High speed asynchronous data interface
10/09/1990USRE33380 Voiceband data set
10/09/1990US4962509 Code violation detection circuit for use in AMI signal transmission
10/09/1990US4962343 Signal transmission circuit
10/04/1990DE3910534A1 Circuit arrangement for increasing the range of a digital network interface component
10/03/1990EP0390645A1 Method of/and device for noise reduction on a codable multi-predetermined level signal
10/03/1990EP0390015A1 Device for processing signalling messages in a communication network using an asynchronous time technique
10/03/1990EP0389874A2 Phase shift circuit and repeater using the same
10/03/1990EP0389697A2 Serial data receiver
10/03/1990EP0389696A1 Serial data receiver
10/02/1990US4961206 Data modem system
10/02/1990US4961205 For transmitting a digital data signal
10/02/1990CA1274912A1 Phase error correcting apparatus
09/1990
09/30/1990CA2012256A1 High speed asynchronous data interface
09/28/1990CA2012687A1 Method and device for reducing noise in a multiple preset levels codable signal
09/26/1990EP0389181A2 Apparatus for detecting the configuration of a communication port
09/26/1990EP0388615A1 CMI decoder and clock frequency recovery
09/26/1990EP0388537A2 Method and device for determining a measured value indicating the degree to which data signals are reproducible outside a digital information processing system
09/25/1990USRE33356 Frequency modulation coding methods with reduced transition intervals
09/25/1990US4959843 Content induced transaction overlap (CITO) block transmitter
09/25/1990CA1274631A1 Three time slot digital subscriber line termination
09/21/1990CA2012523A1 Apparatus for detecting the configuration of a communication port
09/20/1990WO1990010980A1 Time domain radio transmission system
09/20/1990DE4007989A1 Data modem transversal equaliser coefficient selection system
09/19/1990EP0388051A2 Technique for converting either way between a plurality of N synchronized serial bit streams and a parallel TDM format
09/19/1990EP0387890A1 Method of transmitting pulse signal and apparatus therefor
09/19/1990EP0387498A2 Digital transmission system for transmitting a plurality of binary signals on a conductor pair
09/18/1990CA1274292A1 Protection channel monitoring system using a check signal comprising two different n-bit code patterns sequentially arranged at random
09/18/1990CA1274278A1 Modem suited for wireless communication channel use
09/13/1990DE3907737A1 System for generating an STM-1 signal (Synchronous Transport Module) from a 140 Mbit/s signal
09/13/1990DE3907411A1 Intermediate station for a digital signal transmission system
09/12/1990EP0386781A2 Method for scrambling/descrambling data by word-by-word processing
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