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)
11/1980
11/12/1980EP0018686A1 Spectrum converter for analog signals
11/11/1980US4233683 Cascaded equalizer technique
11/04/1980US4232388 Method and means for encoding and decoding digital data
11/04/1980US4232387 Data-transmission system using binary split-phase code
11/04/1980US4232188 Circuit arrangement for receiving simplex and duplex current telegraph characters
10/1980
10/29/1980EP0018142A1 Data transmission systems
10/29/1980EP0018012A1 Digital telecommunication system for two-wire separated-site operation
10/29/1980EP0017988A1 Multiplex interface circuit connecting a processor to a synchronous transmission means
10/29/1980EP0017716A1 Method for initializing an adaptive equalizer starting from an unknown data signal in a transmission system using a double side band modulation with quadrature carriers
10/28/1980US4231023 Binary to ternary converter
10/28/1980US4231015 Multiple-processor digital communication system
10/28/1980US4230911 Carrier terminal unit
10/28/1980US4230903 Data transmission system
10/21/1980US4229831 Drift compensated fiber optic-receiver
10/21/1980US4229821 System for data transmission by means of an angle-modulated carrier of constant amplitude
10/21/1980US4229819 Data transmission system
10/21/1980US4229815 Full duplex bit synchronous data rate buffer
10/14/1980US4228409 Transmission arrangement having an adjustable network
10/14/1980CA1087697A1 Circuit arrangement for blocking a bidirectional amplifier against receiving outgoing signals
10/07/1980US4227251 Clock pulse regenerator
10/07/1980US4227250 Minimization of excess bandwidth in pulse amplitude modulated data transmission
10/07/1980US4227184 Modified Miller Code encoder
10/07/1980US4227181 Peripheral station in an information handling system
10/07/1980US4227175 Data recognition apparatus
10/07/1980US4227160 Transversal type automatic equalizer
10/07/1980US4227152 Method and device for training an adaptive equalizer by means of an unknown data signal in a quadrature amplitude modulation transmission system
10/07/1980US4227045 Data processing protocol system
10/07/1980CA1087258A1 Circuit for wire transmission of high frequency data communication pulse signals
10/02/1980WO1980002092A1 Asynchronous data receiver
10/01/1980EP0016678A1 Clock recovery device
10/01/1980EP0016677A1 Digital-transmission arrangement
10/01/1980EP0016637A1 Passive coupling arrangement and distributed data processing system including such arrangements
10/01/1980EP0016503A1 Waveform correction circuit
10/01/1980EP0016336A1 Digital signal transmission system
09/1980
09/30/1980US4225832 Self-adapting equalizer
09/30/1980CA1086834A1 Data clock separator with missing clock detect
09/23/1980CA1086398A1 Communication system using a multidirectional repeater
09/23/1980CA1086397A1 Polling an data communication system having a pulse position to binary address conversion circuit
09/17/1980EP0015730A1 A data transmission system, and a method of passing data through a data transmission system
09/09/1980US4222116 Digital logic for separating data and clock in Manchester-encoded data
09/09/1980US4222080 Velocity tolerant decoding technique
09/09/1980US4222072 Video player/recorder with non-linear mark length modulation
09/04/1980WO1980001863A1 Coefficient tap leakage for fractionally-spaced equalizers
09/03/1980EP0015182A1 Numerical interpolator for time-shared processing on several channels
09/03/1980EP0014968A1 Circuit for clock recovery in regenerators for digital signals
09/02/1980US4220816 Digital duplex transmission system
09/02/1980CA1152164B Dc free encoding for data transmission system
09/02/1980CA1085000A1 Dc free encoding for data transmission system
08/1980
08/26/1980US4219890 Digital signal regulation system
08/26/1980US4219851 Group coded recording data recovery system
08/20/1980EP0014592A2 Bus fault detector
08/19/1980US4218770 Delay modulation data transmission system
08/19/1980US4218758 Parallel-to-serial binary data converter with multiphase and multisubphase control
08/12/1980US4217572 Arrangements for transmitting electrical signals between two devices which are connected by contacts
08/06/1980EP0013990A1 Serial binary information transmission method and devices for implementing the method
08/05/1980US4216426 Self-clocked data transmission system having automatic signal reversing means
08/05/1980CA1083227A1 Method and apparatus for performing binary equalization in voice-band phase-modulation modems
08/05/1980CA1083225A1 Apparatus for establishing communication between a first radio transmitter and receiver and a second radio transmitter and receiver
08/05/1980CA1083224A1 Apparatus for indicating synchronization and out-of- synchronization conditions
08/05/1980CA1083223A1 Apparatus for indicating synchronization of a radio receiver with a radio transmitter
08/05/1980CA1083222A1 Fault location system for a repeatered pcm transmission system
07/1980
07/29/1980US4215245 Variable rate synchronous digital transmission system
07/23/1980EP0013343A1 Process and device to detect a pseudo-random sequence of 0 degree and 180 degree phase changes of the carrier in a data receiver
07/22/1980US4214206 Digital transmission system having direct bit extraction from scrambled bit streams
07/15/1980US4213007 Method and apparatus for monitoring a pulse-code modulated data transmission
07/15/1980CA1081816A1 Bidirectional digital information transmission system using a single two-wire line
07/15/1980CA1081801A1 Regenerator for an optical transmission system
07/09/1980EP0013070A1 Video record systems
07/09/1980EP0012917A1 Homodyne transmission system
07/09/1980EP0012884A1 Process and apparatus for detecting a pseudo-random sequence of two symbols in a data receiver using a double sideband modulation with quadrature carriers
07/09/1980EP0012880A1 Method of decoding phase-encoded, frequency-modulation encoded and modified-frequency modulation encoded binary data
07/08/1980US4212038 Double density read recovery
07/08/1980US4211929 Fiber-optical system for transmitting multilevel signals
07/08/1980US4211920 Fault location system for optical repeating paths
07/01/1980CA1080807A1 Distortion adapter receiver having intersymbol interference correction
06/1980
06/26/1980WO1980001348A1 Synchronization of a data communication receiver with a received signal
06/25/1980EP0012515A1 Instrument for testing susceptibility of PCM regenerators to noise
06/24/1980US4209771 Code converting method and system
06/24/1980US4209662 Circuit arrangement for scanning the character elements of characters at arbitrarily determinable points, in particular for the correction of teletypewriter characters
06/17/1980US4208724 System and method for clocking data between a remote unit and a local unit
06/17/1980CA1079817A1 Data bus arrangement for josephson tunneling device logic interconnections
06/11/1980EP0011746A1 Regeneration circuit for an isochronous data signal
06/11/1980EP0011699A1 Circuit for measuring the phase jitter of digital signals, and its use
06/10/1980US4207528 Timing-phase control system for duobinary transmission
06/10/1980CA1079430A1 Telecommunication line switching circuit
06/03/1980US4206368 Signal isolating technique
06/03/1980CA1078929A1 Digital regenerator having improved noise immunity
05/1980
05/27/1980CA1078523A1 Data communications system with improved asynchronous retiming circuit
05/20/1980US4204228 Digital testing apparatus
05/15/1980WO1980001026A1 Regenerator having automatic gain control referenced to a data-pattern-dependent pulse stream
05/06/1980US4201979 Conveying data signals between relatively rotatable units
05/06/1980US4201942 Data conversion system
05/06/1980US4201909 Data-transmission system and method using fiber-optical transmission
05/06/1980US4201884 Digital data transmission system
05/06/1980CA1077170A1 Apparatus and method for transmitting binary-coded information
05/01/1980WO1980000904A1 Digital phase-locked loop
05/01/1980WO1980000903A1 A method of phase synchronization in a synchronous data transmission system,and apparatus for carrying out the method
04/1980
04/30/1980EP0010344A1 Digital signal detector
04/29/1980US4200838 Apparatus for evaluating the error rate of binary digital signals
04/29/1980CA1076704A1 Device for decoding miller coded messages
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