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)
05/1979
05/15/1979CA1054733A1 Pcm regenerators
05/15/1979CA1054721A1 In band signalling
05/15/1979CA1054719A1 Circuit for curtailing effects of bit errors in pulse coded transmission
05/15/1979CA1054694A1 Circuit arrangement for the ungrounded transmission of signals through testing points in communication systems
05/15/1979CA1054526A1 Detector circuitry for pcm repeater
05/08/1979US4153848 Receiver circuit
05/08/1979US4153816 Time assignment speech interpolation communication system with variable delays
05/08/1979US4153814 Transition coding method for synchronous binary information and encoder and decoder employing the method
05/08/1979CA1054066A1 Method and apparatus for the synchronization of a deciphering device functioning as receiver with an enciphering device functioning as transmitter
05/01/1979US4152649 Channel equalization apparatus and method using the Fourier transform technique
05/01/1979US4152582 Compaction/expansion logic
05/01/1979US4152541 Full duplex driver/receiver
05/01/1979CA1053805A1 Rate independent signalling means
05/01/1979CA1053758A1 Optical communication system with bipolar input signal
04/1979
04/24/1979US4151565 Discrimination during reading of data prerecorded in different codes
04/17/1979US4150404 Device for transferring digital information
04/10/1979US4149144 Polling and data communication system having a pulse position to binary address conversion circuit
04/03/1979US4147891 Arrangement for distribution of clock signals
03/1979
03/27/1979US4146909 Sync pattern encoding system for run-length limited codes
03/27/1979US4146743 Adaptive sampling decoder-encoder apparatus and method
03/27/1979CA1051554A1 Binary phase digital decoding system
03/27/1979CA1051528A1 Data recovery system resistant to frequency deviations
03/27/1979CA1051524A1 Method and apparatus for adjusting and readjusting an automatic corrector for a data signal transmission system
03/27/1979CA1051346A1 Direct connection digital transmission apparatus
03/20/1979US4145747 Method for establishing a tap coefficient of an adaptive automatic equalizer
03/20/1979US4145743 Voltage level generator using digital integration
03/20/1979US4145574 Circuit arrangement for the transmission of digital signals between subscriber stations of a time multiplex telecommunications network
03/20/1979CA1051100A1 Threshold gate having a variable threshold level
03/20/1979CA1051097A1 Automatic equalizer for phase-modulated data transmission systems
03/06/1979US4143418 Control device and method for reading a data character from a computer at a fast rate and transmitting the character at a slow rate on a communication line
03/06/1979US4143239 Signal distortion correction circuit in teleprinter equipment
03/06/1979CA1050124A1 Cable distortion correction circuits
02/1979
02/27/1979US4142065 Method for bit-synchronous transmission of data
02/27/1979CA1049414A1 Combined scrambler-encoder for multilevel digital data
02/20/1979US4141010 Digital encoder for door operator
02/20/1979US4140974 Distortion corrector for the adaptive base band correction of a phase-modulated signal
02/13/1979CA1048415A1 Digital single signal line full duplex method and apparatus
02/06/1979US4138596 Equipments for connecting PCM multiplex digital transmission systems having different nominal bit rates
02/06/1979CA1048178A1 Digital multiplexing
02/06/1979CA1048157A1 Video thresholder
02/06/1979CA1047936A1 Transmission system for pulse signals of fixed clock frequency
01/1979
01/23/1979US4136258 Transition encoding apparatus
01/23/1979CA1047126A1 Phase-locked loop having a slight phase offset error
01/16/1979US4135057 High density digital transmission system
01/02/1979US4132975 Majority decision device
12/1978
12/19/1978US4130724 Data receiver with synchronizing sequence detection circuit
12/19/1978CA1044828A1 Method and apparatus for remote control monitoring and localizing of pulse repeater-regenerators
12/19/1978CA1044814A1 Method and apparatus for encoding data and clock information in a self-clocking data stream
12/05/1978US4128743 Circuit arrangement for blocking a bidirectional amplifier against receiving outgoing signals
12/05/1978CA1043908A1 Non-synchronous duobinary encoding
11/1978
11/28/1978US4127878 Magnetic tape recorder/reproducer for ratio recording with synchronized internal and external clock rates
11/14/1978US4125899 Bessel function type automatic delay equalizer
11/14/1978US4125812 Apparatus for baseline restoration in an AC-coupled signal
11/14/1978US4125746 Partial byte transmit apparatus for digital communication systems
11/14/1978CA1042514A1 Digital data transmission systems
11/07/1978US4124778 Digital frame synchronizing circuit
11/07/1978CA1042107A1 Complex analog waveform generator
10/1978
10/31/1978US4123710 Partial response QAM modem
10/31/1978US4123625 Digital regenerator having improving noise immunity
10/31/1978CA1041654A1 Multiplexer commutated high pass filter
10/31/1978CA1041613A1 Repositioning of equalizer tap-gain coefficients
10/24/1978US4122441 Error detection and indication system for bi-phase encoded digital data
10/24/1978US4122397 Apparatus and method for timing recovery from a pseudo-ternary signal
10/24/1978US4122358 Supervisory system for a data transmission system
10/24/1978US4122300 Data transmission system and application thereof to the transmission of analog signals and of data in a network with delta modulation
10/24/1978CA1041208A1 Seismic data telemetering system
10/24/1978CA1041182A1 Automatic equalizing method and system
10/17/1978US4121295 Integer weighted impulse equivalent coded signal processing apparatus
10/17/1978US4121195 Error detection in digital systems
10/17/1978US4121118 Bipolar signal generating apparatus
10/17/1978US4121095 Optical receiver
10/17/1978US4121057 Frame synchronizing device
10/10/1978CA1040328A1 T.d.m. transmission of asynchronously occuring binary data
10/03/1978US4118791 Multi-level encoding system
10/03/1978US4118686 Error correction for signals employing the modified duobinary code
09/1978
09/26/1978US4117277 Arrangement for simultaneous two-way data transmission over two-wire circuits
09/26/1978CA1039361A1 Synchronous, non return to zero bit stream detector
09/19/1978US4115865 High-speed correlating device
09/19/1978US4115849 Data interface bridge
09/19/1978US4115768 Sequential encoding and decoding of variable word length, fixed rate data codes
09/19/1978US4115706 Integrated circuit having one-input terminal with selectively varying input levels
09/19/1978US4114710 Carrier regeneration circuit
09/19/1978CA1038977A1 Data modems with automatic equalization, drop-out detection and data echo protection
09/12/1978US4114141 Digital communication system for transmitting digital information between a central station and a number of remote stations
09/05/1978US4112383 Miller-encoded message decoder
09/05/1978CA1038082A1 Circuit arrangement for conversion of an analog signal into a binary signal
09/05/1978CA1037874A1 Transmission system for pulse signals of fixed clock frequency
08/1978
08/29/1978US4110697 Digital bypassable register interface
08/29/1978US4110691 Apparatus and method for detecting errors in a 7-level correlative signal
08/29/1978US4109856 Method for transmitting binary signals
08/29/1978CA1037608A1 Self-clocked pulse signal decoders
08/29/1978CA1037607A2 Retrospective pulse modulation and apparatus therefor
08/29/1978CA1037599A1 Time-division pulse-multiplex digital electric signal switching circuit arrangement
08/29/1978CA1037570A1 Demodulating circuitry for pulse rate modulation data reproduction
08/22/1978US4109236 Apparatus for digital data recovery from mass storage devices
08/22/1978US4109211 Variable thresholding circuit for converting an analog signal to a binary signal
08/15/1978US4107656 Data communication receiver and transfer apparatus
08/15/1978US4107554 Data bus arrangement for Josephson tunneling device logic interconnections
08/15/1978CA1036705A1 D.c. signal receiving circuit arrangements
08/08/1978US4105979 Clock regenerator comprising a frequency divider controlled by an up-down counter
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