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)
07/1978
07/25/1978US4103238 Transmitter modulated with three modulation patterns
07/18/1978US4101834 Methods and apparatus for rejection of interference in a digital communications system
07/18/1978US4101734 Binary to multistate bus driver, receiver and method
07/18/1978US4101732 Start and stop system
07/11/1978US4100541 High speed manchester encoder
07/11/1978US4100495 Adaptive method of and means for recovering digital signals
07/04/1978US4099024 Communications network repeater
07/04/1978US4099023 Method for the regulation of the phase of a timing signal in a data transmission system
07/04/1978US4099022 System for pulse data transmission through water-return cables
06/1978
06/27/1978US4097860 Offset compensating circuit
06/27/1978US4097859 Three-level to two-level decoder
06/27/1978US4097807 Automatic equalizing method and system
06/27/1978US4097771 Integrated clock pulse shaper
06/27/1978US4097687 Partial response system
06/13/1978US4095048 Method of synchronizing a pulse code modulation (pcm) junction and an arrangement for applying this method
05/1978
05/30/1978US4092599 Annunciator communication system
05/30/1978US4092596 Data transmission and reception system
05/30/1978US4092595 Data transmission system for transmitting primary and secondary intelligence
05/30/1978US4092492 Clockless serial data transfer
05/16/1978US4090242 Method and means for evaluating phase encoded communication systems
05/16/1978US4090154 Matching arrangement for converting bi-directional signals into binary signals
05/09/1978US4089061 Method and apparatus for determining the initial values of the coefficients of a complex transversal equalizer
05/09/1978US4088832 Split phase code synchronizer and demodulator
05/02/1978US4087855 Valid memory address enable system for a microprocessor system
05/02/1978US4087752 Digital communications tree searching detection
05/02/1978US4087642 Digital data communication system
05/02/1978US4087626 Scrambler and unscrambler for serial data
04/1978
04/25/1978US4086627 Interrupt system for microprocessor system
04/25/1978US4086587 Apparatus and method for generating a high-accuracy 7-level correlative signal
04/25/1978US4086534 Circuit for wire transmission of high frequency data communication pulse signals
04/18/1978US4085288 Phase locked loop decoder
04/11/1978US4084070 Overcurrent protection circuit
04/11/1978US4084069 Encoding and driving means for use in a three-level digital data communication system
04/04/1978US4083010 Receiving means for use in a digital data communication system
04/04/1978US4083005 Three-level serial digital data communication system
03/1978
03/28/1978US4081790 Code converter
03/28/1978US4081787 Prioritied photo-isolated digital data transmission system
03/28/1978US4081756 Dual channel signal detector circuit
03/28/1978US4081749 Re-entry telemetry system
03/28/1978US4081662 Clock supervision in digital systems
03/21/1978US4080572 Receiver and method for synchronizing and detecting coded waveforms
03/14/1978US4079202 Digital communication system
03/14/1978US4079195 Method and apparatus for the synchronization of a deciphering device functioning as a receiver with an enciphering device functioning as transmitter
03/07/1978US4078204 Di-phase pulse receiving system
03/07/1978US4078159 Modified duobinary repeatered span line
03/07/1978US4078157 Method and apparatus for regenerating a modified duobinary signal
02/1978
02/28/1978US4077004 Fault location system for a repeatered PCM transmission system
02/21/1978US4075607 System for collecting data from meters placed at remote places
02/14/1978US4074127 Optical PCM group transmission repeating system
02/14/1978US4074074 Time division digital transmission system
01/1978
01/31/1978US4071887 Synchronous serial data adaptor
01/31/1978US4071827 Transversal type automatic phase and amplitude equalizer
01/31/1978US4071705 Quantized non-synchronous clipped speech multi-channel coded communication system
01/31/1978US4071692 Data transmission systems
01/24/1978US4070631 Digital noise blanking circuit
01/24/1978US4070550 Quantized pulse modulated nonsynchronous clipped speech multi-channel coded communication system
01/24/1978US4070545 Multidirectional repeater
01/10/1978US4068172 Method of and means for measuring distortion of binary and ternary signals
01/03/1978US4066878 Time-domain filter for recursive type signals
01/03/1978US4065862 Method and apparatus for synchronizing data and clock signals
12/1977
12/27/1977US4065796 Digital data decoder
12/27/1977US4065639 Synchronous transmission control system
12/20/1977US4064422 Weight multiplier for use in an adapter processor
12/20/1977US4064397 Automatic equalizer having a coefficient matrix circuit
12/13/1977US4063235 Non-return to zero mark to non-return to zero level code converter
12/13/1977US4063220 Multipoint data communication system with collision detection
12/13/1977US4063045 Telecommunication line switching circuit
12/13/1977US4063040 High speed multiplexer and demultiplexer for pulse code channels
12/13/1977US4063038 Error coding communication terminal interface
11/1977
11/29/1977US4060771 Method and circuit arrangement for conditioning direct current signals in electric measurand transmitters, particularly electromechanical precision and fine balances
11/29/1977US4060739 Circuit arrangement for amplifying pulsed signals
11/22/1977US4059727 Data transmission system between telephone subscriber location and telephone exchange location during idle telephone condition
11/01/1977US4056851 Elastic buffer for serial data
11/01/1977US4056791 Apparatus for correcting distortion in low frequency cable
10/1977
10/25/1977US4055775 Transmission circuit for direct current data transmission
10/25/1977US4055727 Partial response, quadrature amplitude modulation system
10/18/1977US4054949 Stagnation prevention apparatus in an information transmission system
10/18/1977US4054754 Arrangement for transmitting digital data and synchronizing information
10/11/1977US4053846 Amplifier apparatus
10/11/1977US4053738 Programmable data envelope detector
10/11/1977US4053723 Method and apparatus for measuring the bit error frequency in a cable caused by crosstalk between line pairs during transmission of a 3-level coded pcm signal
10/11/1977US4053708 Asynchronous sample pulse generator
10/04/1977US4052671 Adaptive equalizer
10/04/1977US4052558 Data transmission system
09/1977
09/27/1977US4051539 Differential duration demultiplexing method and system
09/13/1977US4048673 O bus interface for a data processing system
09/13/1977US4048440 Asynchronous-to-synchronous data concentration system
09/06/1977US4047107 Pulse width responsive security system
09/06/1977US4047055 Line control unit for teleprinters
09/06/1977US4047013 Method and apparatus for fast determination of initial transversal equalizer coefficient values
09/06/1977US4046959 Data communication system using photocouplers
08/1977
08/30/1977US4045684 Information transfer bus circuit with signal loss compensation
08/30/1977US4045618 Device for synchronizing a binary data train in relation to a reference train
08/30/1977US4045614 System for controlling polarity state of start-stop telegraph signal train
08/23/1977US4044307 Data modems with automatic equalization, drop-out detection and data echo protection
08/16/1977US4042783 Method and apparatus for byte and frame synchronization on a loop system coupling a CPU channel to bulk storage devices
08/09/1977US4041418 Equalizer for partial response signals
08/09/1977US4041373 Capacitive pulse pickup
08/09/1977US4041239 Method and apparatus for the transmission of data
08/02/1977US4039967 Phase-locked loop having a slight phase offset error
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