| Patents for H04B 3 - Line transmission systems (31,523) |
|---|
| 06/12/1990 | CA1270312A1 Appliance system |
| 06/07/1990 | DE3908284C1 Test device for checking the cancelling function of a digital echo canceller |
| 06/06/1990 | EP0371700A2 Digital automatic gain control |
| 06/06/1990 | EP0371662A2 Remote testing of metallic loops with a trans hybrid signal |
| 06/06/1990 | EP0371567A2 Echo canceller |
| 06/05/1990 | US4931980 Digital computing device for a data transmission installation using code 2B 1Q or the like |
| 06/05/1990 | US4931791 Shorted-coaxial-cable detector for local-area networks |
| 06/02/1990 | CA2004476A1 Adaptive rate control for echo cancelling modem |
| 05/31/1990 | WO1990006023A1 Modulation device |
| 05/30/1990 | EP0370921A1 Apparatus for technical control of a building using a two-wire data and power transmission line |
| 05/30/1990 | EP0370772A2 Digital signal reproducing apparatus |
| 05/22/1990 | US4928308 Echo canceller circuit |
| 05/22/1990 | US4928287 Automatic equalizer |
| 05/22/1990 | CA1269426A1 Power line communication interference preventing circuit |
| 05/17/1990 | WO1990005415A1 Method and apparatus for decoding a quadrature modulated signal |
| 05/17/1990 | DE3936712A1 Analog-digitale, opto-elektromagnetische zaehlvorrichtung fuer fluessigkeiten Analog-to-digital opto-electro-magnetic counter for liquids |
| 05/16/1990 | EP0368307A2 Demodulator with composite transversal equalizer and eye detection clock synchronizer |
| 05/16/1990 | EP0368189A2 Reduction of signal processing requirements in a 2B1Q-code echo canceller or equalizer |
| 05/16/1990 | EP0368013A1 Circuit for an adaptive comb filter for separating the luminance and chrominance signals of a composite PAL or NTSC video signal |
| 05/16/1990 | CN1042281A Automatic balancing circuit for longitudinal transmission system |
| 05/15/1990 | US4926499 Carrier phase controller for a receiver of phase modulated signals |
| 05/15/1990 | US4926472 Reduction of signal processing requirements in a 2B1Q-code echo canceller or equalizer |
| 05/15/1990 | US4926158 Powered communication link |
| 05/03/1990 | WO1990004906A1 Adaptive pal or nstc comb filter |
| 05/02/1990 | EP0366584A2 Full-duplex digital speakerphone |
| 05/02/1990 | EP0365696A1 Transmission system |
| 05/01/1990 | US4922530 Adaptive filter with coefficient averaging and method |
| 05/01/1990 | US4922368 Method and apparatus for detecting and discriminating faults in transmission circuits |
| 04/25/1990 | EP0365350A2 Transmission of data via power lines |
| 04/25/1990 | EP0364618A1 Multiple signal transmission device |
| 04/24/1990 | US4920530 Adaptive time-discrete filter for forming a cancelling signal from synchronous data symbols |
| 04/19/1990 | WO1990004306A1 Signal transmission |
| 04/18/1990 | EP0364383A2 Half-duplex speakerphone |
| 04/18/1990 | EP0363551A1 Adaptive equalization for recording systems using partial-response signaling |
| 04/18/1990 | EP0363500A1 Circuit arrangement for the correction of digital signals received in an analogous form |
| 04/18/1990 | CN1007690B Method for increasing capable of telephone line circuit |
| 04/17/1990 | US4918727 Double talk detector for echo canceller and method |
| 04/17/1990 | US4918685 Transceiver arrangement for full-duplex data transmission comprising an echo canceller and provisions for testing the arrangement |
| 04/17/1990 | US4918422 Method and apparatus for extracting inbound information generated line-to-line in a multi-phase electric distribution system |
| 04/17/1990 | US4918402 Delay circuit having at least one all-pass network |
| 04/11/1990 | CN2056001U Closed sound-control vibration energy telephone for disaster relief |
| 04/10/1990 | CA1267727A1 Interface circuit |
| 04/04/1990 | EP0360904A1 Circuit arrangement for the correction of digital signals received in an analogous form |
| 04/03/1990 | US4914692 Automatic speech recognition using echo cancellation |
| 04/03/1990 | US4914418 Outbound detector system and method |
| 03/27/1990 | US4912758 Full-duplex digital speakerphone |
| 03/27/1990 | US4912667 Transmission arrangement for digital signals |
| 03/21/1990 | EP0358757A1 Measurement of the variation in time of a periodic signal |
| 03/20/1990 | US4910791 Monitoring and control of data communications |
| 03/20/1990 | US4910768 Automatic balancing circuit for longitudinal transmission system |
| 03/20/1990 | US4910628 Terminal unit in information transmission system |
| 03/20/1990 | US4910467 Method and apparatus for decoding a quadrature modulated signal |
| 03/20/1990 | US4910464 Proximity detector |
| 03/20/1990 | CA1266896A1 Transmit line buildout circuits |
| 03/20/1990 | CA1266893A1 Frequency-domain block-adaptive digital filter |
| 03/14/1990 | CN2054597U Double constant-current source feeding device with automatic balance output |
| 03/13/1990 | US4908838 Correlation detecting circuit operable in a low frequency |
| 03/08/1990 | WO1990002380A1 Selective active cancellation system for repetitive phenomena |
| 03/07/1990 | CN1007115B Waveform shaping circuit |
| 03/07/1990 | CN1007108B Centre control receiver |
| 03/06/1990 | US4907291 Transmitter/receiver apparatus |
| 02/28/1990 | EP0355532A2 Arrangement for transmitting data and supply voltage via a bus |
| 02/27/1990 | US4905254 Arrangement for combating intersymbol interference and noise |
| 02/22/1990 | WO1990001837A1 Automatic balancing circuit for longitudinal transmission system |
| 02/21/1990 | CN2053411U Additional unit for transmission circuit of automatic telephone |
| 02/21/1990 | CN1039869A Modal transmission method and apparatus for multi-conductor wireline cables |
| 02/20/1990 | US4903247 Digital echo canceller |
| 02/20/1990 | US4903006 Power line communication system |
| 02/20/1990 | EP0335948A4 Decoupling network and communication system. |
| 02/20/1990 | CA1266104A1 Arrangement for compensating for non-linear distortion in an input signal to be digitized and an echo cancelling system comprising such an arrangement |
| 02/13/1990 | US4901003 Telecommunications wiring test apparatus and method including two color display indicating correct wiring |
| 02/13/1990 | CA1265854A1 Adaptive filter for producing an echo cancellation signal in a transceiver system for duplex digital communication through one single pair of conductors |
| 02/13/1990 | CA1265847A1 Adaptive time-discrete filter for forming a cancelling signal from synchronous data symbols |
| 02/07/1990 | EP0353891A2 Synchronising fractional tap equalisation with received signals |
| 02/07/1990 | EP0353808A1 Current compensating circuit |
| 02/07/1990 | CN1039513A Method for increasing the communication capacity of the phone line |
| 02/06/1990 | US4899367 Multi-level quadrature amplitude modulator system with fading compensation means |
| 02/06/1990 | US4899366 Tap rotation n fractionally spaced equalizer to compensate for drift due to fixed sample rate |
| 02/06/1990 | US4899365 Circuit for connection to a signal channel |
| 02/06/1990 | CA1265594A1 Echo cancellers for bidirectional digital transmission systems |
| 01/31/1990 | EP0352869A2 Modal transmission method and apparatus for multi-conductor wireline cables |
| 01/30/1990 | US4897832 Digital speech interpolation system and speech detector |
| 01/23/1990 | US4896334 Method and apparatus for timing recovery |
| 01/23/1990 | US4896318 Method for cancelling echo in a transmitter and an apparatus therefor |
| 01/23/1990 | US4896277 Method of mapping refrigerated containers in a power line carrier based monitoring system |
| 01/23/1990 | US4894952 Movable door |
| 01/23/1990 | CA1264824A1 Waveform shaping circuit |
| 01/18/1990 | DE3823058A1 Device for monitoring and/or controlling operating stations of communications systems |
| 01/17/1990 | EP0350999A2 Device to equalize and demodulate binary continuous phase modulated data signals with modulation index 0.5 |
| 01/16/1990 | US4894864 Interface circuit |
| 01/16/1990 | US4894820 Double-talk detection in an echo canceller |
| 01/03/1990 | EP0348810A2 Method for addressing processor units and circuit arrangement for carrying out the method |
| 01/03/1990 | EP0348809A2 Method for addressing processor units and circuit arrangement for carrying out the method |
| 01/02/1990 | US4891837 Voice control circuit for a communication terminal |
| 01/02/1990 | US4891801 Terminal for the transmission of data over a bidirectional analog channel with echo cancellation controlled by the reception rate |
| 01/02/1990 | US4891704 System for asymmetrical signal transmission |
| 12/28/1989 | WO1989012934A1 An initial training apparatus for use in a transmitter and receiver apparatus |
| 12/27/1989 | EP0348100A2 Phase jitter compensation arrangement using an adaptive IIR filter |
| 12/27/1989 | EP0348095A2 Non-interfering method for measuring propagation delay of telecommunications network and apparatus for accomplishing same |
| 12/26/1989 | US4890170 Waveform equalization circuit for a magnetic reproducing device |