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)
04/1982
04/06/1982US4323932 Readback pulse compensator
04/06/1982CA1121514A1 Programmable bus driver isolation
04/01/1982WO1982001111A1 Self-clocking data transmission system
03/1982
03/31/1982EP0048490A1 Circuit arrangement for transforming a binary input signal into a telegraphy signal
03/31/1982EP0048475A1 Transversal equalizer
03/30/1982US4322844 Transmitter-receiver synchronizer
03/30/1982US4322811 Clamping circuit for an adaptive filter
03/29/1982EP0040217A4 Apparatus for and method of processing data signals.
03/24/1982EP0047955A2 Wave-shaping circuit
03/23/1982CA1120584A1 Double density read recovery
03/23/1982CA1120557A1 Balanced termination for a transmission line
03/23/1982CA1120551A1 Door seal arrangement for high-frequency heating apparatus
03/17/1982EP0047476A1 Equalizer for intelligence signals
03/16/1982US4320525 Self synchronizing clock derivation circuit for double frequency encoded digital data
03/16/1982US4320523 Digital signal reception system
03/16/1982US4320521 Data bus transceiver
03/16/1982US4320517 Method and device for effecting the initial adjustment of the clock in a synchronous data receiver
03/16/1982US4320516 Circuit for ascertaining of the phase jitter of digital signals
03/16/1982US4320515 Bit synchronizer
03/16/1982US4320465 Digital frequency modulation and modified frequency modulation read recovery with data separation
03/16/1982US4320416 Technique for optimally encoding digitally encoded video signals
03/16/1982US4320388 Two wire optical data communication system
03/16/1982CA1120119A1 System for identifying and correcting the polarity of a data signal
03/10/1982EP0047128A2 An output buffer circuit
03/10/1982EP0046938A1 Circuit for synchronising a transmitting-receiving set with the data network of a digital information system
03/09/1982US4319338 Industrial communications network with mastership determined by need
03/09/1982US4319288 Current injection tapped delay line spectral shaping equalizer and differentiator
03/09/1982US4319227 Three state signaling system
03/09/1982US4319080 Method of locating faulty pulse repeaters
03/03/1982EP0046577A1 Circuit arrangement for filters in half-duplex transmission
03/02/1982US4318128 Process and device for retrieving digital data in the presence of noise and distortions
03/02/1982CA1119305A1 Error correction for signals employing the modified duobinary code
03/02/1982CA1119302A1 Binary information transmission method and coding and decoding devices therefor
03/02/1982CA1119272A1 Multiple-processor digital communication system
03/02/1982CA1119271A1 Receiver for digital signals in line code
02/1982
02/23/1982US4317236 Laser digital transmitter
02/23/1982US4317235 System for transmitting optical binary data signals through an optical fiber with pilot pulses inserted between two wide spaced successions of data signals
02/23/1982US4317212 Arrangement for checking the synchronization of a receiver
02/23/1982US4317207 Data transmission system
02/23/1982US4317205 Wideband transceiver with EMI suppression
02/23/1982US4317198 Rate converting bit stream demultiplexer and multiplexer
02/23/1982US4317111 Digital device for synchronizing and decoding coded signals
02/18/1982WO1982000536A1 Stage converter of electric signals
02/16/1982US4316262 Remote meter reading system
02/16/1982US4316061 Minimal delay rate-change circuits
02/16/1982US4316057 Circuit arrangement for the automatic, adaptive distortion correction of ringings of at least three-stage base band signal
02/10/1982EP0045680A1 Method of transcoding information, and transmission system using such a method
02/02/1982US4314355 Apparatus and method for receiving digital data at a first rate and outputting the data at a different rate
01/1982
01/27/1982EP0044780A2 Digital communication system on a continuous-flow channel
01/27/1982EP0044685A1 Data communication system
01/27/1982EP0044555A1 Regenerator with tester for violation of the coding rule
01/27/1982EP0044554A1 Supervisory arrangement for a PCM regenerator with tester for violation of the coding rule
01/26/1982US4313206 Clock derivation circuit for double frequency encoded serial digital data
01/26/1982US4313203 Transmission system for the transmission of binary data symbols
01/26/1982US4313103 Digital demodulator
01/26/1982US4313088 Arrangement for generating a clock signal
01/20/1982EP0044073A1 System for recording digital information in a pulse-length modulation format
01/19/1982US4312073 Spectrum converter for analog signals
01/19/1982US4311989 Binary converter in particular for transmitters and receivers of reduced redundancy image data
01/12/1982CA1116240A1 System for data transmission by means of an angle-modulated carrier of constant amplitude
01/06/1982EP0043065A1 Transmission-line signal coupler
01/06/1982EP0042976A1 Bi-directional communication system for a two wire digital telephone link
01/05/1982US4309772 Soft quantizer for FM radio binary digital signaling
01/05/1982US4309770 Method and device for training an adaptive equalizer by means of an unknown data signal in a transmission system using double sideband-quadrature carrier modulation
01/05/1982US4309694 Zero disparity coding system
12/1981
12/30/1981EP0042621A1 Regenerator for multilevel digital signals
12/30/1981EP0042576A1 Interference suppressing device comprising drivers with common supply
12/30/1981EP0042446A1 Automatic equalizer
12/29/1981US4308618 Method of compensating phase noise at the receiver end of a data transmission system
12/29/1981US4308613 Simplex, party-line electromagnetic data packet transmission system with a self seeking alternate routing capability
12/29/1981CA1115356A1 Clock pulse regenerator
12/24/1981WO1981003727A1 Wideband transceiver with emi suppression
12/23/1981EP0042229A1 Digital transmission systems
12/22/1981US4307468 Data transmission systems
12/15/1981US4306307 Method of reducing phase noise at the receiver end of a data transmission system
12/15/1981US4306194 Data signal detection circuit
12/10/1981WO1981003559A1 Voiceband data set
12/08/1981US4304962 Data scrambler
12/02/1981EP0040801A1 Automatic equalizer
12/02/1981EP0040660A1 Equalizing apparatus for data transmission lines
12/01/1981US4303896 Wide range data cable equalizer
12/01/1981US4303895 Automatic equalizer
12/01/1981CA1113571A1 Multiple-processor digital communication system
11/1981
11/25/1981EP0040518A1 Data encoding and/or decoding
11/25/1981EP0040217A1 Apparatus for and method of processing data signals.
11/24/1981US4302845 Phase-encoded data signal demodulator
11/24/1981US4302690 CMOS Circuit for converting a ternary signal into two binary signals, and use of this CMOS circuit
11/24/1981CA1113174A1 Circuit arrangement for receiving simplex and duplex current telegraph characters
11/24/1981CA1113158A1 Digital transmission and reception of information
11/18/1981EP0039980A1 Adaptive digital data receiving system with compensation of the amplitude and phase distortions introduced by the data transmission channel
11/18/1981EP0039979A1 Adaptive digital data receiving system with compensation of the amplitude and phase distortions introduced by the data transmission channel
11/17/1981US4301507 Electronic postage meter having plural computing systems
11/11/1981EP0039501A1 Sending amplifier for remotely fed repeaters
11/10/1981US4300239 Optical repeater monitoring system
11/10/1981US4300233 Noise assessment of PCM regenerators
11/10/1981US4300231 Digital system error correction arrangement
11/10/1981US4300018 Electronic relay arrangement
11/10/1981CA1112327A1 Peripheral station in an information handling system
11/03/1981US4298956 Digital read recovery with variable frequency compensation using read only memories
11/03/1981CA1111965A1 Di-phase pulse receiving system
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