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)
05/1989
05/30/1989CA1254956A1 Digital partial response filter
05/24/1989EP0316536A2 Terminal unit in information transmission system
05/24/1989EP0316459A1 Fast timing acquisition for partial-response signalling
05/23/1989US4833693 Coded modulation system using interleaving for decision-feedback equalization
05/23/1989US4833692 Non-linear amplifier for digital network
05/23/1989US4833691 Line equalizer
05/23/1989US4833467 Data transmission system
05/23/1989US4833346 Switched threshold comparator for a fiber-optic receiver
05/16/1989US4831635 Trellis codes with spectral nulls
05/16/1989CA1254277A1 Digital communication system including an error correcting encoder/decoder and a scrambler/descrambler
05/10/1989EP0072857B1 Data communication system
05/09/1989US4829594 Adaptive correction of DC error transients
05/09/1989US4829545 Method and apparatus for data window centering ina multifrequency data separator
05/09/1989US4829541 Pseudo-ternary code transmitter
05/09/1989US4829300 Signal generation
05/09/1989CA1253967A1 Method and circuit for suppressing sequential "zeroes" data
05/05/1989WO1989001721A3 Synchronous signal decoder
05/03/1989EP0314300A2 Remote connection of a termination network
05/03/1989EP0313953A1 Method and apparatus for the generation of a correcting signal in a digital clock recovery device
05/03/1989DE3736125A1 Equalizer for time-invariant channels or channels which are slowly time-variant
05/02/1989US4827489 Decoding device for digital signals
05/02/1989US4827475 Transmitting a digital signal and an additional signal
04/1989
04/26/1989EP0313532A1 Adaptive equalizer included in the receiver for a data transmission system
04/26/1989EP0312573A1 Backplane bus.
04/25/1989US4825450 Binary data communication system
04/25/1989US4825402 Multiconfigurable interface driver/receiver circuit for a computer printer peripheral adaptor
04/25/1989US4825113 Single transmission line bidirectional optical communication system
04/25/1989CA1253229A1 Adaptive communication rate modem
04/20/1989WO1989002201A3 High-speed digital data communication system
04/19/1989EP0311972A2 Auto-threshold / adaptive equalizer
04/18/1989US4823364 Receive coupler for binary data communication systems
04/18/1989US4823360 Binary data regenerator with adaptive threshold level
04/18/1989US4823312 Asynchronous communications element
04/18/1989US4823095 Remote connection of termination network
04/18/1989CA1252895A1 Byte-wide encoder and decoder system for rll (1,7) code
04/18/1989CA1252832A1 Optical pulse receiving circuit
04/18/1989CA1252831A1 Equalizer with improved performance
04/13/1989DE3833004A1 Parallel/serial converter for parallel sensor signals
04/12/1989CN1032414A Improved external circuit of automatic line
04/11/1989US4821292 Adaptive limiter/detector which changes time constant upon detection of dotting pattern
04/11/1989US4821289 Multiple parallel channel equalization architecture
04/11/1989US4821288 Parallel channel equalizer architecture
04/11/1989US4821286 Quaternary signal regenerator
04/05/1989EP0310237A2 Line build out circuits
04/05/1989EP0309888A1 Method and circuit arrangement for producing filtered signals
04/05/1989EP0309849A1 Arrangement for the correction of the pulse length of a digital signal
04/05/1989EP0309802A2 Interface circuit for connecting test instrumentation
04/04/1989US4819080 Instrument for measuring the phase jitter of analog signals
04/04/1989US4818995 Parallel transmission system
04/04/1989CA1252237A1 Expanded partial response processing for analog signal enciphering and the like
03/1989
03/29/1989EP0308959A2 Receiver capable of improving signal-to-noise ratio in reproducing digital signals
03/29/1989EP0308650A2 Method and device for deducting the word clock of a pulse position modulated signal
03/29/1989EP0308450A1 Jitter control in digital communications links.
03/28/1989US4817148 Signal scrambling transmission system
03/28/1989US4817115 Encoding and decoding system for electronic data communication system
03/28/1989US4817114 Multipoint data modem communication system
03/28/1989US4816820 Radio communication receiver with apparatus for altering bit rate of the receiver
03/28/1989CA1251867A1 Packet transmission device in an asynchronous temporal network and method for coding silences
03/23/1989WO1989002684A1 Adapter between coaxial cable and twisted pair cables
03/23/1989DE3737015C1 Method and circuit arrangement for extracting a clock signal for a CMI signal
03/22/1989EP0307793A2 Bus driving and decoding circuit
03/22/1989EP0307749A1 Method for optical data transmission between two galvanically separated transmission and reception devices
03/21/1989US4815111 Data receiving system
03/21/1989US4815107 Digital code decoding apparatus
03/21/1989US4815105 Selective signalling encoder/decoder for multipoint data communication networks
03/21/1989US4815103 Equalizer-based timing recovery
03/21/1989US4814637 Pulse shaper
03/21/1989CA1251586A1 Ensemble modem structure for imperfect transmission media
03/21/1989CA1251558A1 Method of magnetically recording video signals and an apparatus therefor
03/15/1989EP0306757A2 Error detection and correction circuit
03/15/1989EP0306713A2 Method and device for data processing
03/15/1989EP0306585A1 Data transmission system with a digital alarm facility
03/14/1989US4813044 Method and apparatus for detecting transient errors
03/09/1989WO1989002201A2 High-speed digital data communication system
03/08/1989EP0306201A2 Receiver and method of operating same
03/08/1989EP0306059A2 Telemetry system with signal booster for digital data transmission through a transmission line
03/08/1989EP0305554A2 Optical star bus with an active coupler
03/08/1989EP0305467A1 Method and apparatus for transmitting a synchronous data signal on a transmission medium on which the transmission rate is greater than the data signal bit rate.
03/07/1989US4811364 Method and apparatus for stabilized data transmission
03/07/1989US4811361 Method and apparatus for transmission of digital data
03/07/1989US4811360 Apparatus and method for adaptively optimizing equalization delay of data communication equipment
03/07/1989US4811359 Protection channel monitoring system using a check signal comprising two different N-bit code patterns sequentially arranged at random
03/07/1989CA1250910A1 Asynchronous and non-data decision directed equalizer adjustment
03/07/1989CA1250907A1 Device for transmitting a clock signal with a synchronisation signal
03/07/1989CA1250906A1 Repeater for the distribution of triple clock signals
02/1989
02/28/1989US4809363 Method for automatic level matching in a local network, in particular a multicomputer arrangement, comprising a bus system having light waveguides, for the purpose of collision recognition
02/28/1989US4809303 Dynamic speed shifter for fiber optic work station
02/28/1989US4809301 Detection apparatus for bi-phase signals
02/28/1989US4809298 Radio data transmission system
02/28/1989US4809256 Optical demultiplexer
02/28/1989US4808970 Decoding device for CMI code
02/28/1989US4808939 Variable rate rectangular matched filter
02/28/1989US4808855 Distributed precharge wire-or bus
02/28/1989US4808008 Method of transmitting digital streams over higher rate channels and a device for implementing same
02/23/1989WO1989001721A2 Synchronous signal decoder
02/23/1989WO1988002171A3 Remote accessible memory devices
02/22/1989EP0304362A1 Digital calculating apparatus for data transmission equipment using code 2B1Q or the like
02/22/1989EP0304081A2 Digital communication system using partial response and bipolar coding techniques
02/22/1989EP0303691A1 Encoding and decoding system for electronic data communication system
02/21/1989US4807290 Self-synchronizing scrambler
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