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| Number | Title | Issue Date |
| 7085874 | Synchronous/asynchronous bridge circuit for improved transfer of data between two circuits The bridge circuit comprises a first interface circuit operable to receive data from a data source at a first data rate; a second interface circuit operable to transmit the data to a data receiver at a second data rate; a data coupling circuit comprising: a synchron... | 08/01/2006 |
| 5303261 | High-throughput pipelined communication channel for interruptible data transmission A high-throughput bidirectional data communication channel is formed of a pipelined plurality M of stages, connected to the input/output (I/O) port of each of the pair of devices using the channel, and configured to allow interruptibility of data transmis... | 04/12/1994 |
| 5132987 | Bidirectional communication line buffer apparatus The invention relates to a bidirectional communication line buffer apparatus in which the communication direction of data of a bidirectional data line and the length of the data are judged. A bidirectional buffer circuit receives the results of such judge... | 07/21/1992 |
| 4841551 | High speed data-clock synchronization processor The present invention generates a data clock for data processing circuitry by developing an optimum locally generated clock signal which is selected with each received data message. This is achieved by utilizing a local crystal clock which serves as an in... | 06/20/1989 |
| 4837778 | Circuit arrangement for time-regeneration of broadband digital signals A circuit arrangement for time regeneration of digital signals comprises a correction circuit and a control circuit containing a low-pass filter. For time regeneration of broadband digital signals coded in a DC-free code in broadband digital signal switch... | 06/06/1989 |
| 4680772 | Digital signal repeater including means for controlling a transmitter A digital signal repeater system, including means for controlling the transmitter of the system. The system is substantially immune to fading, interference and noise, and rapidly detects the reception of a digital signal. A first level detector outputs a ... | 07/14/1987 |
| 4670886 | Receiver/driver/repeater interface A repeater circuit for repeating data on a communication channel, the repeater circuit having two receiver/driver circuits arranged in repeating fashion and having a control circuit for maintaining the receiver/driver circuits in a listening mode, for swi... | 06/02/1987 |
| 4628307 | FET switch for high frequency signals A solid state switching network includes three FET switches or devices arranged in a substantially "T" (or inverted "T") configuration. The network is controlled so that in an "OFF" or non-conducting state two of the FET switches are "OFF" and one is on. ... | 12/09/1986 |
| 4626845 | Subscriber validation system A system provides for the validation of users of a trunked radio system. The system includes a controller and at least one microcomputer-controlled repeater module for user identification and validation. Each repeater module includes a tracking filter for... | 12/02/1986 |
| 4553247 | Telemetry system with signal booster for digital data transmission through a transmission line A telemetry system for sensing remote physical events and for transmitting and boosting a digital data signal representing the sensed events on a transmission line, which comprises a master clock and a plurality of sensing stations for sensing local data.... | 11/12/1985 |
| 4468785 | Telemetry system with signal booster for digital data transmission through a transmission line A telemetry system for sensing remote physical events and for transmitting and boosting a digital data signal representing the sensed events on a transmission line, which comprises a master clock and a plurality of sensing stations for sensing local data.... | 08/28/1984 |
| 4374305 | Arrangement for regenerating start-stop signals and dial pulses Described is the regeneration of dial pulses in the signalling system CCITT type B. The dial pulses are regenerated by a combined regeneration process comprising a reduced process with two sampling instants (10 ms, 30 ms) and an inverse process with four ... | 02/15/1983 |
| 4322849 | Data relay system A data relay system transmits addresses from a host device sequentially to each of a plurality of data relays and for transmitting data sequentially through each of the plurality of data relays to the host device. Serial addresses are placed on the data b... | 03/30/1982 |
| 4300018 | Electronic relay arrangement An electronic relay arrangement that is suitable for use as a repeater in systems for single-current as well as double-current telegraphy comprising an input circuit, an output circuit and a transmission circuit interposed between the input and output cir... | 11/10/1981 |
| 4255812 | Signal regenerating apparatus with DC compensation In known signal regenerating apparatus a high frequency signal is continuously applied to the secondary side and inductively coupled back to a resonant circuit on the primary side. The resultant oscillations in the resonant circuit are modulated by the in... | 03/10/1981 |
| 4207528 | Timing-phase control system for duobinary transmission A timing-phase control system provided on the receiving side of a duobinary transmission system is adaptable to high-speed PCM repeater systems using a wide-band transmission medium such as a coaxial cable. The system includes a discriminating and regener... | 06/10/1980 |
| 4175213 | Regenerator having automatic gain control referenced to a data-pattern-dependent pulse stream A roving reference automatic gain control (AGC) arrangement is used in a regenerator of a pulse code modulation (PCM) transmission system. An adjustable gain circuit receives a sequence of data pulses and produces a data-pattern-dependent input signal. A ... | 11/20/1979 |
| 4123625 | Digital regenerator having improving noise immunity A digital repeater for the regeneration of partial-response signals having improved noise immunity which basically comprises an equalizer followed by a regenerator. A band limiting filter disposed between the equalizer and regenerator transforms the parti... | 10/31/1978 |
| 4122358 | Supervisory system for a data transmission system In a data-transmission route involving parallel (e.g. 8Mb/s) data-transmission systems each using a separate line pair, a common line pair, linking all terminal and repeater stations, is used for supervisory and control purposes (signals up to say 25 KHz)... | 10/24/1978 |
| 4101734 | Binary to multistate bus driver, receiver and method A binary to multistate line driver and remote receiver includes a line driver comprising first and second injection logic encoder circuits. The circuits have current injectors and are connected to receive respective first and second binary signals to prov... | 07/18/1978 |
| 4088850 | Remote supply system for a cable transmission line with repeaters subjected to the influence of external electric fields The invention relates in particular to remote supply with AC of repeaters a transmission line with symmetrical pairs. It provides a remote supply system in which the AC remote supply passes through a loop formed by two pairs of the line and in which each... | 05/09/1978 |
| 4078157 | Method and apparatus for regenerating a modified duobinary signal In PCM transmission, it is well known to transmit 24 voice-grade channels at a bit rate of 1.544 Megabits per second (Mb/s). The number of channels which may be transmitted in about the same bandwidth is doubled by the use of correlative level coding, suc... | 03/07/1978 |
| 4078159 | Modified duobinary repeatered span line An end-office repeater accepts a high-speed bipolar signal, converts the bipolar signal into a unipolar signal, scrambles the unipolar signal, and encodes the scrambled unipolar signal into a modified duobinary signal for transmission over a cable pair. B... | 03/07/1978 |
| 4029907 | Asynchronous digital repeater An asynchronous, regenerative, digital repeater for use in bipolar digital signalling systems includes an amplifier for receiving and amplifying incoming signals, a first monostable multivibrator for producing regenerated pulses responsively to the output... | 06/14/1977 |
| 4011406 | PCM regenerator A PCM regenerator including an amplitude decision device, a time decision device which includes an input transformer with its secondary connected to a pair of transistors which form a push-pull circuit and wherein the output of directly consecutive pulses... | 03/08/1977 |
| 4007329 | Data communications system with improved asynchronous retiming circuit A data communication system for asynchronously transmitting intermittently generated digitally encoded data between a data processor and a plurality of data terminals associated therewith is disclosed wherein the allowable communications line distance bet... | 02/08/1977 |
| 4004091 | Bidirectional line driver A bidirectional line driver circuit for transmitting logic signals on a highly capacitive, or low impedance transmission line makes use of a tandem connection of switching means for providing a low impedance connection from the output of the driver circui... | 01/18/1977 |
| 4000364 | Regulated pulsed current telegraph adapter A regulated current pulse is generated for use in transferring digital data from low level voltage devices to those requiring substantially high current such as teletypewriters. By utilizing low voltage components, the current pulse level is continuously ... | 12/28/1976 |
| 3992581 | Phase locked loop NRZ data repeater A phase locked loop repeater for reshaping a non-return to zero (NRZ) data stream. A transition detector receives the input data stream from a coaxial cable in a degraded condition in terms of amplitude and phase distortion and produces reference pulses w... | 11/16/1976 |
| 3983324 | Full duplex driver/receiver The present disclosure describes semiconductor devices and circuits for sending and receiving data at high speed between computer modules with excellent noise immunity and low drive power. The semiconductor circuits are arranged to send data single-ended ... | 09/28/1976 |
| 3980973 | Line device for transmission lines having coaxial cables for the transmission of digital or analog signals A line device for transmission lines having coaxial cables for the transmission of signals, in particular digital signals or analog signals, employs an input equalizer in the form of a line section connected in parallel or in series to the transmission pa... | 09/14/1976 |
| 3976835 | Supervisory systems for telecommunication line transmission system A repeater for a digital data-transmission system using a disparity-displaying digital code comprises a digital regenerator and error-detecting means therefor and in which supervisory control means incorporated in the repeater is operative upon reception ... | 08/24/1976 |
