| Patents for H04L 25 - Baseband systems (55,083) |
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| 04/28/1981 | US4264972 Method and circuit for detecting errors in digital signals |
| 04/28/1981 | US4264935 Balanced tapped delay line spectral shaping differentiation circuit for signal detection |
| 04/28/1981 | US4264880 Signal generator for producing pulse signals for a remote control |
| 04/28/1981 | US4264827 Current mode data or power bus |
| 04/22/1981 | EP0027289A1 Digital signal transmission system |
| 04/21/1981 | US4263673 Receive buffer for converting synchronous-to-asynchronous data |
| 04/21/1981 | US4263591 Electric transmission system |
| 04/16/1981 | WO1981001089A1 Control of coefficient drift for fractionally spaced equalizers |
| 04/16/1981 | WO1981001088A1 Equalizer for complex data signals |
| 04/14/1981 | US4262360 Method and device for detecting a pseudo-random sequence of carrier phase changes of 0° and 180° in a data receiver |
| 04/14/1981 | CA1099368A1 Electric direct current telegraphy transmitter |
| 04/14/1981 | CA1099364A1 Partial byte transmit apparatus for digital communication systems |
| 04/08/1981 | EP0026699A1 Method and device for coding digital data, device for decoding digital data and a transmission system comprising such a device |
| 04/08/1981 | EP0026603A1 Microprogrammable TDMA terminal controller |
| 04/08/1981 | EP0026436A2 PCM regenerator |
| 04/07/1981 | US4261051 Time-division-multiplexed exchanger |
| 04/07/1981 | US4260952 Circuit for decoding a diphase signal |
| 04/07/1981 | CA1098977A1 Apparatus for transmitting multilevel signals on optical fibres |
| 04/01/1981 | EP0026065A1 Improvements in or relating to transversal equalisers |
| 04/01/1981 | EP0025895A1 Generation of multilevel digital signals from binary signals having a very high bit rate |
| 04/01/1981 | EP0025853A1 Circuit arrangement for excess-voltage protection |
| 03/31/1981 | US4259746 Electrical communications system |
| 03/31/1981 | US4259738 Multiplexer system providing improved bit count integrity |
| 03/25/1981 | EP0025531A2 Generation of multilevel digital signals from binary signals having a very high bit rate |
| 03/25/1981 | EP0025477A2 Method and arrangement for measuring the jitter of pulse signals in digital transmission systems |
| 03/24/1981 | CA1098215A1 Clockless serial data transfer |
| 03/18/1981 | EP0025090A1 Impulse regenerator |
| 03/17/1981 | US4257033 Fault locating system in optical fiber transmission system |
| 03/17/1981 | CA1097750A1 Dual channel signal detector circuit |
| 03/10/1981 | US4255813 Dicode transmission system |
| 03/10/1981 | US4255812 Signal regenerating apparatus with DC compensation |
| 03/10/1981 | US4255748 Bus fault detector |
| 03/10/1981 | US4255742 Data communication code |
| 03/10/1981 | US4255713 Carrier regeneration circuit for polyphase modulation system |
| 03/10/1981 | US4255712 Digital waveform conditioning circuit |
| 03/04/1981 | EP0024341A1 Circuit arrangement for the reception of direct current signals in telegraphic and data transmission installations |
| 03/04/1981 | EP0024295A1 Apparatus for decoding diphase input signals |
| 03/03/1981 | US4254501 High impedance, Manchester (3 state) to TTL (2 wire, 2 state) transceiver for tapped bus transmission systems |
| 03/03/1981 | US4254318 Door seal arrangement for high-frequency heating apparatus |
| 02/25/1981 | EP0024236A1 Information code conversion method for line transmission and transmission system using such a method |
| 02/24/1981 | US4253187 Method and apparatus for sequencing two digital signals |
| 02/24/1981 | US4253186 Method and device for detecting a pseudo-random sequence of two symbols in a data receiver employing double sideband-quadrature carrier modulation |
| 02/24/1981 | US4253185 Method of transmitting binary information using 3 signals per time slot |
| 02/17/1981 | US4251886 Transmission system for the transmission of data pulses |
| 02/17/1981 | US4251836 System for broadcasting facsimile signals |
| 02/17/1981 | CA1096047A1 Apparatus and method for digitally generating a modified duobinary signal |
| 02/11/1981 | EP0023783A1 Data recovery circuit |
| 02/11/1981 | EP0023558A1 Method for the transmission of digital message signals on a two-wire transmission line in full duplex operation |
| 02/10/1981 | US4250458 Baseband DC offset detector and control circuit for DC coupled digital demodulator |
| 02/03/1981 | US4249266 Fiber optics communication system |
| 02/03/1981 | US4249254 Arrangement for restituting selection signals |
| 02/03/1981 | CA1095166A1 Device for transmitting digital information |
| 01/28/1981 | EP0023056A1 Arrangement having a non-recursive filter |
| 01/27/1981 | US4247941 Simulator for bit and byte synchronized data network |
| 01/27/1981 | US4247940 Equalizer for complex data signals |
| 01/27/1981 | US4247935 Arrangement for converting start-stop signals into an isochronous signal |
| 01/27/1981 | US4247934 Testing system for data transmission paths |
| 01/21/1981 | EP0022723A1 Method and apparatus for digital data extraction in presence of noise and distorsion |
| 01/21/1981 | EP0022558A1 Circuit arrangement for amplitude control in an automatic adaptive time domain equalization of the side lobes of an at least three level base band signal |
| 01/20/1981 | US4246642 Leaky digital integrator |
| 01/14/1981 | EP0022147A1 Circuit arrangement for automatic bit rate recognition of a transition encoded information signal |
| 01/13/1981 | US4245263 Write precompensation and write encoding for FM and MFM recording |
| 01/13/1981 | CA1093698A1 Arrangement for simultaneous two-way data transmission over two-wire circuits |
| 01/13/1981 | CA1093644A1 Data receiver with synchronizing sequence detection circuit |
| 01/07/1981 | EP0021943A1 Microwave digital data transmission system |
| 01/07/1981 | EP0021410A1 Circuitry for an electronic direct-current telegraphy transmitter |
| 01/07/1981 | EP0021053A1 Communication equipment |
| 01/07/1981 | EP0020827A1 An arrangement for monitoring the performance of a digital transmission system |
| 01/06/1981 | US4244052 Receiver word alignment for digital transmission systems using a redundant ternary line code |
| 01/06/1981 | US4244051 Data communication method and apparatus therefor |
| 01/06/1981 | US4243976 Ternary to binary converter |
| 01/06/1981 | US4243956 Automatic equalizer for a synchronous digital transmission signal |
| 01/06/1981 | CA1093178A1 Arrangement for distribution of clock signals |
| 12/30/1980 | US4242755 Circuit arrangement for decoding digital signals |
| 12/24/1980 | WO1980002900A1 Converter included in a phase modulator |
| 12/23/1980 | US4241455 Data receiving and processing circuit |
| 12/23/1980 | US4241330 Multiple-processor digital communication system |
| 12/23/1980 | US4241311 Digital majority noise filter for bi-level data reception |
| 12/23/1980 | CA1092245A1 Synchronisation device "frame" |
| 12/23/1980 | CA1092241A1 Encoding by transition of binary data |
| 12/16/1980 | US4240035 Digital demodulator on a semiconductor base |
| 12/16/1980 | US4239934 Means and an apparatus for synchronizing an orthogonal diphase code receiver |
| 12/16/1980 | CA1152182B Dc-free encoding for data transmission system |
| 12/16/1980 | CA1091784A1 Regulation of the phase of a timing signal in a data transmission system |
| 12/16/1980 | CA1091778A1 Digital signal performance monitor |
| 12/11/1980 | WO1980002784A1 Digital data communication system |
| 12/10/1980 | EP0019920A1 Digital data communication system |
| 12/10/1980 | EP0019821A2 Method and device for transmitting a binary sequence |
| 12/02/1980 | US4237554 Coefficient tap leakage for fractionally-spaced equalizers |
| 12/02/1980 | US4237496 Device for coding/decoding data for a medium |
| 12/02/1980 | CA1152181B Decoding apparatus and method for d.c. free data transmission system |
| 11/26/1980 | EP0019194A1 Digital telecommunication system with at least one four-wire line section |
| 11/25/1980 | US4236256 Asynchronous data receiver |
| 11/25/1980 | US4236253 Monostable multivibrator for use in pulse count demodulator or the like |
| 11/25/1980 | US4236087 Programmable bus driver isolation |
| 11/25/1980 | CA1090476A1 Apparatus for word synchronization in an optical communication system |
| 11/18/1980 | US4234897 DC Free encoding for data transmission |
| 11/18/1980 | CA1089994A1 Offset compensating circuit |
| 11/18/1980 | CA1089993A1 Apparatus and method for generating a data code with a spectral null |
| 11/18/1980 | CA1089933A1 Digital encoder for door operator |