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7599316 |
Bi-directional bridge circuit having high common mode rejection and high input sensitivity
A bidirectional communications interface is provided that connects a transmitter and a receiver, or a transceiver, to a transmission line. Under an embodiment, the bidirectional interface generates...
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7327802 |
Method and apparatus for canceling the transmitted signal in a homodyne duplex transceiver
An apparatus comprises a transmitter, a receiver, an antenna and a signal cancellation circuit. The transmitter is configured to send a transmitter signal associated with a frequency. The receiver...
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7111181 |
Apparatus for discovering a powerability condition of a computer network
The invention is directed to techniques for discovering a powerability condition of a computer network such as the existence of a remotely powerable device attached to a connecting medium of the...
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7103013 |
Bidirectional bridge circuit having high common mode rejection and high input sensitivity
A bidirectional communications interface is provided that connects a transmitter and a receiver, or a transceiver, to a transmission line. Under an embodiment, the bidirectional interface generates...
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6970516 |
Programmable polarity for high speed differential interfaces
A system generally having a first circuit, a second circuit, and a pair of non-crossing conductive paths. The first circuit may be configured to convert between (i) a serial signal on a first...
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6728240 |
Serial-link circuit including capacitive offset adjustment of a high-speed receiver
A serial link circuit includes a transmitter which multiplexes the circuit's input signals together and uses a single processing circuit to generate a multiplexed output to be transmitted. The...
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6704277 |
Testing for digital signaling
In an electronic system having logic agents that communicate with each other through one or more signal lines, a method for testing high speed digital signaling on the signal lines is disclosed....
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6639423 |
Current mode driver with variable termination
A simultaneous bidirectional port circuit includes a current mode output driver for driving an output node and a current mode return driver for driving a differential receiver. Variable impedance...
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6631962 |
System for ink short protection
A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first...
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6584079 |
Apparatus and method of implementing a home network by filtering ISDN-based signals within the customer premises
An arrangement for implementing a network in an ISDN-BASED customer premises having a 4-wire ISDN S0 bus. The ISDN-BASED customer premises includes a Network Termination Basic Access (NTBA) that...
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6507580 |
Method of controlling a calling in distributed node exchange network, distributed node exchange and distributed node exchange network
The present invention provides a method of controlling a call between nodes in a distributed node exchange network having interconnections of plural exchanges, wherein a distributed node has a...
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6463092 |
System and method for sending and receiving data signals over a clock signal line
The system preferably includes a unique transmitter that sends both clock and data signals over the same transmission line. The receiver uses the same transmission line to send data signals back to...
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6426970 |
Bi-directional signal coupler method and apparatus
A bi-directional signal coupler is incorporated into a transmission/reception communication system and is used for the transmission and reception of signals over a single transmission medium. The...
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6407684 |
Method and device for estimating the frequency of a digital signal
A frequency estimator for estimating the frequency of a digital input signal (x(k)) includes a phase detection device ( 2 ) for determining the phase (φ(k)) of the input signal (x(k)), a...
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6304106 |
CMOS bi-directional current mode differential link with precompensation
A Complementary Metal Oxide Semiconductor (CMOS) current mode differential link with precompensation is provided. The Complementary Metal Oxide Semiconductor (CMOS) bi-directional current mode...
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6172992 |
Measuring device for the interface of a transmission link with full-duplex transmission in two-wire common band operation
A measuring device for the interface of a transmission link with full-duplex transmission in two-wire common band operation includes a device for simulating the interface that allows the signal in...
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6064657 |
Method and system for transmitting data using a modem with a directional control mechanism
The present invention pertains to a system for transmitting data. The system comprises a network on which free topology transmission of data occurs. The system comprises a first node. The system...
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6034995 |
System for the transmission of data via a differential bus
The transmission of data via a differential bus by means of balanced signals is not only reliable, but also offers the advantage that in the event of various single faults, i.e. faults concerning...
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5952914 |
Power line communication systems
Two duplex channels are provided using only three lines, two power lines and one neutral line. The transmitter/receiver of each duplex channel includes adaptive filters to cancel cross-coupling...
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5936946 |
Measuring device for the interface of a transmission path with full-duplex transmission in the common carrier duplex process
A measuring device for the interface of a transmission path with full-duplex transmission in the common carrier duplex process. A highly integrated interface unit is connected to the interface via...
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5812596 |
Repeater for use in a control network
A repeater for use in a control network includes isolating transformers at its root input/output and at a plurality of branch input/outputs. There is a line receiver and a line driver circuit...
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5784407 |
Method and device for monitoring an abnormality in digitally transmitted audio signals
An analogue audio signal input to a transmission unit 1 is band limited into a frequency band lower than that of a main signal pass with a low-pass filter 21 and then converted into a digital value...
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5719856 |
Transmitter/receiver interface apparatus and method for a bi-directional transmission path
A transmitter/receiver interface (12) for use with a bi-directional transmission path (18) couples a transmitter (14) and a receiver (16) to the bi-directional transmission path (18). The...
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5666354 |
CMOS bi-directional differential link
A full-duplex, differential, bi-directional communications link for simultaneously transmitting differential data between electronic devices is provided. Each transceiver coupled to the...
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5663984 |
High performance bus driving/receiving circuits, systems and methods
Circuitry 200 is provided for transmitting data between a first endpoint and a second endpoint and includes an information line 201 and a dummy line 205. Information transmission circuitry 202,...
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5579336 |
Bidirectional transreceiver for high speed data system
A transceiver circuit for use in a high speed data transmission network is disclosed that provides for simultaneous bidirectional transmission of data over coaxial or twisted pair media for...
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5541535 |
CMOS simultaneous transmission bidirectional driver/receiver
A CMOS driver/receiver pair is provided which includes a non-inverting buffer in the input path to a differential receiver circuit. The non-inverting buffer allows a plurality of different...
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5502716 |
Arrangement for discriminating signals on a duplex line without interrupting duplex traffic
In prior-art telecommunication systems a two-wire line carrying digital duplex traffic is tapped by inserting, at a line interruption, two mutually coupled hybrid circuits which convert the...
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5436887 |
Digital full-duplex transceiver
The present invention provides a digital full-duplex line driver which allows digital information to be transmitted across a single bus simultaneously in both directions. The present invention...
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5347543 |
Device for differential-mode information transmission between at least two elements of a motor vehicle
This device in which the elements are linked by two information transmission lines (2, 3) and each of which includes information sending and reception circuits (4, 5), linked to a protocol handler...
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5243623 |
Switchable multi-mode transceiver interface device
A transceiver interface device in accordance with the present invention includes features which allow the transceiver to be switched for operation in either a differential or a single-ended mode....
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5216667 |
Simultaneous bidirectional transceiver
A digital data transceiver comprises a conventional push-pull driver and a novel receiver. The transceiver can drive data to and simultaneously receive data from a transceiver of like kind via the...
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5202905 |
Moden signal detecting system for adaptive differential PCM CODEC
A modem signal detecting system for an adaptive differential code modulation system, which is intended for detecting a modem training signal, comprises a comparison and decision circuit which...
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5182745 |
Data transmission method and arrangement
For the transmission of data in the form of difference signals between subscribers connected to a bus, bus couplers are provided which permit switching between transmit and receive operation. The...
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4929941 |
Device for transmitting items of information for an automobile vehicle and a method of using said device
This device for the differential transmission of items of information between at least two elements (1, 2) of an automobile vehicle, each of which elements comprises transmitting means (13, 16) and...
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4813066 |
Battery feed circuit for a telephone system
An arrangement is disclosed for delivering DC power (battery), voice, and ta signals from a telephone controller to a telephone station over first and second wire-pairs. Minimum interference...
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4740952 |
Device for the simultaneous transmission of two data signals over the same electrical line in opposite directions
This device comprises, at a first end (1) of the line, at least one controlled voltage source (SV2) and a current receiver (RI2) capable of detecting the current (I) flowing in the line (L) and, at...
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4698800 |
Bi-directional transceiver circuit
A simultaneous bi-directional transceiver is described. The transceiver comprises two circuits which are disposed at opposite ends of an interchip cable. In response to the application of digital...
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4638473 |
Two wire bidirectional digital transmission system
A two-wire bidirectional transmission system for transmitting electrical signals simultaneously in opposite directions between terminals over a pair of wires wherein the transmitter at one terminal...
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4621170 |
Means of transmitting signals along a line while also providing a direct voltage source
A transmission configuration between a main station and a local station consists of a line which permits supplying of direct voltage power for stations from a source within the main station. A...
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4604740 |
Digital transceiver for full-duplex transmission of binary signals over a common line
A transceiver inserted between a source of binary signals and a one-wire line, dialoguing with a similar transceiver in series with another source at the opposite end of the line, comprises two...
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4598396 |
Duplex transmission mechanism for digital telephones
A duplex digital transmitter system is disclosed which permits simultaneous digital signal exchange over a two-wire loop. Two sets are provided at the ends of the loop, each having a three-port...
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4560843 |
Electronic external line repeater
An electronic external line repeater connects a two-wire side to two four-wire sides. The repeater contains two optocouplers (FT1-D1, FT2-D2). A self-compensating negative feedback circuit is...
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4549049 |
Arrangement for testing a device provided with an echo canceller
The test arrangement is intended to test, for example, a modem whose transmitter and receiver are coupled to the transmission line by means of a hybrid junction and comprises an echo canceller. The...
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4525845 |
Balanced circuit for connecting receiver and transmitter to transmission line
A dataset apparatus is powered by voltages extracted from electrical signals passing between the data terminal apparatus and the dataset by circuits comprising a capacitor and diode combination....
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4520475 |
Duplex communication transceiver with modulation cancellation
A duplex FM communication transceiver 10 is disclosed in which a modulated transmit carrier signal is utilized as the receiver first mixer (32) injection signal. The receiver portion of the...
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4519066 |
Duplexer with sum and difference signal outputs
A duplexer is provided in which a transmit input signal is fed in parallel through two autotransformers to a pair of portal loops for establishing an interrogation field. Significantly lower...
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4516236 |
Full-duplex transmission of bit streams serially and in bit-synchronism on a bus between two terminals.
Each of two terminals transmits a bit stream to a two-wire line in the form of a unipolar pulsed signal, the terminals transmitting pulses of opposite polarity with the bits synchronized, so that...
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4480327 |
Single channel duplex communication system
A single channel duplex transmitter/receiver utilizing digital frequency shift keying (FSK) signals. An analogue-to-digital converter frequency modulates the output of a local oscillator whose...
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4450582 |
Method and apparatus for increasing the capacity of a satellite transponder by reuse of bandwidth
A method and apparatus for increasing the capacity of present and future satellite communication systems transmits signals from correspondent pairs of earth stations simultaneously in channels that...
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