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8548030 Relay apparatus  
A relay apparatus, comprises a reception section that receives real-time data, a monitoring section that periodically detects quality of a transmission path to be used for transmitting the...
8509288 Spatial multiplexing gain for a distributed cooperative communications system using randomized coding  
Multiple cooperative relays operate in a highly mobile environment and form a virtual antenna array. Multiple independent streams of data can be simultaneously, transmitted in parallel to the...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
3904824 Automatic gain control for encoded data  
Automatic gain control is provided for a transmission system wherein the data is transmitted in frames including one or more flag bits. Circuitry is included for selecting one of the flag bits and...
3818360 REGENERATIVE REPEATER OUTPUT STAGE FOR BIPOLAR CODED MESSAGE SIGNALS  
An output stage for a bipolar coded signal amplifier, having two pairs of input terminals receiving signals of the same polarity, and one pair of output terminals delivering bipolar signals. It...
3760111 PULSE REGENERATIVE REPEATER FOR A MULTILEVEL PULSE COMMUNICATION SYSTEM  
Disclosed herein is a pulse regeneration repeater system which includes means for extracting from a train of multi-level code pulses the clock signal defining the bit interval. Received code...
3757051 REGENERATIVE REPEATER FOR PCM SIGNALS TRANSMITTED IN THE ALTERNATE POLARITY MODE  
A regenerative repeater for alternate polarity PCM signals is disclosed that does not require an equalizer or amplifier. The PCM signals are directly detected by (1) determining whether the slope...
3745249 REGENERATIVE TRANSMISSION SYSTEM FOR DIGITAL SIGNALS  
A repeater for binary signals, inserted in a transmission path, includes in its input circuit a narrow-band filter with a pass band whose midfrequency substantially equals half the basic pulse...
3710022 SAMPLING AND RETIMING CIRCUIT FOR PCM REPEATERS  
In a system for the transmission of information coded in terms of the presence and polarity of pulses in a signal pulse train, a circuit for reconstituting degraded pulses comprising a source of...
3699273 ECHO SUPPRESSION GATE FOR DIGITAL CODE WORDS INCLUDING NOISE INSERTION  
Apparatus for suppressing echoes in digital speech transmission systems includes a serial-to-parallel converter, a buffer store and a parallel-to-serial converter. Digital code words propagating...
3681529 COMMUNICATIONS APPARATUS FOR TRANSMITTING AND RECEIVING SYNCHRONOUS AND ASYNCHRONOUS DATA  
Bipolar pulses received over a communications line are restored to a bilevel signal condition. A sync signal is also developed from the received bipolar pulses. Local terminal means are provided...
3671875 DIGITALLY OPERATED SIGNAL REGENERATOR AND TIMING CIRCUIT  
A digitally operated signal timing circuit employs a single synchronous up-down counter with overriding set and reset in combination with a group of flip-flops and logic gates. In effecting the...
3671886 METHOD AND APPARATUS FOR AUTOMATIC GAIN CONTROL  
Disclosed herein is automatic gain control circuitry for a transmission line of a PCM regenerative repeater, wherein such circuitry uses multistage variable equalizing networks. Each network has a...
3659055 PULSE SIGNAL REPEATER  
A pulse signal filter for repeating high-low input level dial pulses wherein an output flip-flop is settable into one of two stable states to apply to an output circuit a high or a low signal...
3651265 BIPOLAR REPEATER  
The invention relates to a bipolar repeater to be used in any system in which the transmission of information takes place by means of pulses in bipolar or pseudo-ternary form. The sensitivity of...
3647966 APPARATUS FOR CONNECTING TRANSMISSION CHANNELS  
Apparatus for connecting telegraph channels by control from a central control member having access to respective sections to be connected, including a transmitter and a receiver connected in...
3646451 TIMING EXTRACTION CIRCUIT USING A RECIRCULATING DELAY GENERATOR  
A timing circuit generates the timing signal used in the regeneration of pulse code modulation signals by taking a previously regenerated signal and inserting pulses where they are missing from...
3643026 RETRANSMITTING APPARATUS FOR CONVERTING INTERRUPTED TELEGRAPHIC MODULATED SIGNALS INTO TELEGRAPHIC SIGNALS WITHOUT INTERRUPTIONS  
A telegraphy retransmitter receives bipolar modulated signals interrupted by telegraphic modulation equipment and retransmits the bipolar modulated signals without the interruptions. The...
3626095 REGENERATING REPEATING SYSTEM FOR START-STOP TELEGRAPH SIGNALS  
Disclosed herein is a regenerative repeating system for start-stop serial telegraph signals of a plurality of channels by the use of a time-divisional serial-parallel signal converter and a...
3609239 FAIL-SAFE PULSE REPEATER  
The invention relates to a fail-safe signal repeater for receiving and repeating a signal from and to an electrically continuous rail. The signal repeater includes an input circuit electrically...

Matches 1 - 50 out of 274 1 2 3 4 5 6 >