| Patents for H04B 3 - Line transmission systems (31,523) |
|---|
| 04/05/1988 | US4736431 Active attenuation system with increased dynamic range |
| 04/05/1988 | US4736414 Method of and device for the digital cancellation of the echo generated in connections with time-varying characteristics |
| 04/05/1988 | US4736392 Demodulator for digital FM signals |
| 04/05/1988 | US4736388 Automatic fall back and restore system for data communication |
| 03/30/1988 | EP0261620A2 Circuit arrangement and bus circuit with a large bandwidth, and a component for a broadband switching network |
| 03/30/1988 | EP0261600A2 Data communication system having level control means |
| 03/30/1988 | EP0261476A1 Method and circuit for the synchronization of a clock generator |
| 03/29/1988 | US4734919 Circuit for serial data communication and power transmission |
| 03/23/1988 | EP0260851A2 Data transmission system with correlation receiver |
| 03/23/1988 | EP0260839A2 Protection arrangements for communications lines |
| 03/23/1988 | EP0260753A1 Delay circuit comprising all-pass networks |
| 03/23/1988 | EP0260752A1 Active symmetrical balance hybrid circuit |
| 03/23/1988 | EP0260678A1 Full duplex modem having two echo cancellers for a near end echo and a far end echo |
| 03/17/1988 | DE3631438A1 Circuit arrangement to compensate for direct-current magnetomotive forces in transformers |
| 03/15/1988 | US4731834 Adaptive filter including signal path compensation |
| 03/15/1988 | US4731816 Ensemble modem structure for imperfect transmission media |
| 03/15/1988 | US4731810 Neighborhood home security system |
| 03/15/1988 | US4731590 Circuits with multiple controlled gain elements |
| 03/15/1988 | US4731550 Circuit having a feed circuit for supplying current to a load resistor |
| 03/15/1988 | CA1234235A1 Full duplex speakerphone for radio and landline telephones |
| 03/10/1988 | WO1988001820A1 Control of the amplification of signals transmitted in a bidirectional and simultaneous way |
| 03/10/1988 | WO1988001812A1 Linear predictive echo canceller integrated with relp vocoder |
| 03/09/1988 | EP0258920A2 Noise reduction in signal transmission system over building power distribution wiring |
| 03/09/1988 | CN87200532U Door bell and dialogue device |
| 03/08/1988 | US4730342 Equalizer circuit for use in communication unit |
| 03/08/1988 | US4730341 Equalizer and equalizing circuit using the same |
| 03/08/1988 | CA1233889A1 Equalizer for frequency independent and dependent transmission loss components with a pilot used for the frequency independent component |
| 03/08/1988 | CA1233888A1 Image suppression mixer of the waveguide type |
| 03/03/1988 | DE3629706A1 Method for coding and transmitting analog information |
| 03/02/1988 | EP0257526A2 Amplitude equalizer |
| 03/01/1988 | US4729126 Method and apparatus for supervising the accessing and testing of communication systems |
| 03/01/1988 | US4729125 On-line serial communication interface to a transmitter from a current loop |
| 03/01/1988 | US4728300 Surface covering allowing an electric receiver to be supplied with power at varying positions on the surface |
| 02/23/1988 | US4727566 Method to test the function of an adaptive echo canceller |
| 02/23/1988 | US4727543 Method and apparatus for adjusting a digital equalizing filter |
| 02/17/1988 | EP0053629B1 Voiceband data set |
| 02/16/1988 | US4726062 Duplex hands-free communications circuit |
| 02/16/1988 | US4726036 Digital adaptive filter for a high throughput digital adaptive processor |
| 02/16/1988 | US4726035 Analog/digital adaptive line enhancer |
| 02/16/1988 | CA1232987A1 Echo cancellor and centre clipper control arrangement |
| 02/11/1988 | WO1988001116A1 Equalizer for transmission systems |
| 02/11/1988 | DE3702316C1 Method and circuit arrangements for adaptive echo cancellation in terminals for duplex transmission |
| 02/03/1988 | EP0255285A2 Word-sliced signal processors |
| 02/03/1988 | EP0254846A1 Data transmission method and apparatus |
| 01/28/1988 | DE3622988A1 Telecontrol system |
| 01/21/1988 | DE3723737A1 Reproduction device for stereophonic signals |
| 01/20/1988 | EP0253583A2 Adaptive digital filter |
| 01/20/1988 | EP0253096A2 Time synchronization method in a data transmission system |
| 01/20/1988 | EP0253062A2 A method for measuring the overall loss in four-wire phone circuits, and apparatus for carrying it out |
| 01/20/1988 | EP0253039A1 Method and apparatus for the protection against echos in a modem |
| 01/19/1988 | CA1231757A1 Equipment for locating a signal reflection point in a transmission line |
| 01/12/1988 | US4719530 Lightning protection system for a remote control circuit utilizing an isolation transformer |
| 01/12/1988 | CA1231453A1 Digital signal transmission cable noise analyzer |
| 01/12/1988 | CA1231427A1 Electrical disturbance protective device between a terminal and a telephone line |
| 01/12/1988 | CA1231397A1 Waveform shaping apparatus |
| 01/07/1988 | EP0252038A1 Apparatus for detecting received signals in a telecommunication system |
| 01/07/1988 | EP0251690A2 Circuits with multiple controlled gain elements |
| 01/07/1988 | EP0251568A1 Power line communication interference preventing circuit |
| 01/05/1988 | US4718073 Demodulator for facsimile equipment |
| 12/29/1987 | US4716584 Noise-free terminal station compatible with existing master stations |
| 12/29/1987 | CA1230949A1 Signal multiplexing circuit |
| 12/23/1987 | EP0250048A1 Frequency-domain block-adaptive digital filter |
| 12/22/1987 | US4715064 Adaptive hybrid circuit |
| 12/22/1987 | US4715045 System protocol for composite shift keying communication system |
| 12/22/1987 | US4714912 Single-conductor power line communications system |
| 12/22/1987 | US4714440 Universal adapter and methods of and apparatus for making same |
| 12/16/1987 | EP0249220A1 Circuit arrangement for automatically connecting the remote feeding current paths of a remote feeding loop |
| 12/15/1987 | US4713803 Bidirectional digital transmission system with echo-cancellation |
| 12/10/1987 | DE3610761A1 Method for the analog or digital coding of information for use in angle- and pulse-modulation methods |
| 12/09/1987 | EP0248324A2 Conductor with an adjustable resistance |
| 12/08/1987 | US4712235 Method and apparatus for improved control and time sharing of an echo canceller |
| 12/03/1987 | DE3617949A1 Phase-shift detector |
| 12/02/1987 | EP0247652A1 Data transmission system using code conversion |
| 12/02/1987 | EP0247118A1 Interface circuit. |
| 12/01/1987 | US4710969 CATV testing system |
| 12/01/1987 | CA1229889A1 Maintenance response signalling arrangement for a digital transmission system |
| 11/30/1987 | EP0094431A4 Telemetry system with signal booster for digital data transmission through a transmission line. |
| 11/25/1987 | EP0246658A2 Transmitter/Receiver apparatus |
| 11/25/1987 | EP0246425A1 Apparatus for cancelling echoes in a duplex digital transmission system |
| 11/25/1987 | CN86103381A Numerical multi-frequecy signal pick-up |
| 11/24/1987 | US4709395 Method and apparatus for minimizing errors in the digital processing of electrical signals |
| 11/19/1987 | WO1987007065A1 Arrangement for signal transmission in a measurement circuit |
| 11/17/1987 | US4707841 Digital data receiver for preamble free data transmission |
| 11/17/1987 | US4707840 Line equalizer having pulse-width deviation detector for compensating long-term level variations |
| 11/17/1987 | US4707824 Method and apparatus for cancelling echo |
| 11/17/1987 | US4707672 End equipments for wideband transmission line |
| 11/11/1987 | EP0244807A1 Arrangement for signal transmission in a measuring arrangement |
| 11/10/1987 | US4706188 Method and apparatus for reading samples of a time-dependent signal in a data processing system |
| 11/07/1987 | CN86208121U Repeater well for underground cable communication |
| 11/05/1987 | WO1987006785A1 Apparatus useful in channel equalization adjustment |
| 11/04/1987 | EP0244136A2 Adaptive apparatus for compensating for distortion in an incoming signal comprising quadrature-related carrier signals |
| 11/04/1987 | CN87103095A Echo canceller for coded signals |
| 11/04/1987 | CN87103094A Oversampling echo canceller |
| 11/04/1987 | CN87102420A Distant monitoring and controlling system |
| 10/28/1987 | EP0243033A1 Oversampling echo canceller |
| 10/28/1987 | EP0243032A1 Echo canceller for coded signals |
| 10/27/1987 | US4703306 Appliance system |
| 10/22/1987 | WO1987006409A1 Power line communication apparatus |
| 10/21/1987 | EP0242166A2 Apparatus for transmitting digital signal |
| 10/20/1987 | US4701945 Carrier current transceiver |