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Class 375/288 - Transmission line


Subclass of Class 375 - Pulse or digital communications
Definition: Subject matter including one or more insulated conductors
No. of patents: 138
Last issue date: 04/10/2012


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NumberTitleIssue Date
8155236Methods and apparatus for clock and data recovery using transmission lines
A data receiver circuit includes a transmission line to generate the appropriate timing for clock and data recovery. The transmission line receives a reference signal, and propagates the reference signal through at least two segments of predetermined lengths. The tr...
04/10/2012
8102936Methods and apparatus for clock and data recovery using transmission lines
A data receiver circuit includes a transmission line to generate the appropriate timing for clock and data recovery. The transmission line receives a reference signal, and propagates the reference signal through at least two segments of predetermined lengths. The tr...
01/24/2012
8081705Digital video physical layer using a multi-level data code
Digital video data is transmitted from a video source (61) to a video sink (62) as a group of three multilevel symbols (611, 612, and 613) per pixel color with each associated symbol being sent at a rate of three times the pixel clock (
12/20/2011
8064535Three phase and polarity encoded serial interface
A high speed serial interface is provided. In one aspect, the high speed serial interface uses three phase modulation for jointly encoding data and clock information. Accordingly, the need for de-skewing circuitry at the receiving end of the interface is eliminated,...
11/22/2011
7986745Encoder apparatus and decoder apparatus
An encoding apparatus that converts input digital data and an input clock into three-bit six-state transition encode outputs and outputs them is disclosed. The encoding apparatus has a first state transition control section, second state transition control section, ...
07/26/2011
7912143Biphase multiple level communications
A novel data transmission method and apparatus is disclosed for communicating digital data using existing telephone wiring. According to the present invention, the digital data is represented by the time interval between two consecutive biphasic pulses. Biphasic pul...
03/22/2011
7826551Input and output driver circuits for differential signal transfer, and differential signal transfer apparatus and methods
In one aspect, a differential signal transfer method is provided which includes converting 2M−1 original signals into 2M−1 differential signal pairs, where M is an integer of 2 or more, and wherein each pair consists of a first differential...
11/02/2010
7822143Systems and method for transfering digital data and transfering parallel digital data in a serial data stream including clock information
The present invention provides a data transfer system including a data transmitter and a data receiver. The data transmitter converts a plurality of bits of transmission parallel data into serial data and generates a multi-level logic signal representing a plurality...
10/26/2010
7697628Data signal transmission devices and methods for ternary-line differential signaling
An apparatus for transmitting data signals includes a logic unit configured to generate an encoded clock signal in response to a clock signal and a first data signal, and a demultiplexer configured to receive the encoded signal, the first data signal, and a second d...
04/13/2010
7609778Methods, apparatus, and systems for reducing interference on nearby conductors
In a method of data transmission according to one embodiment of the invention, data transitions on adjacent conductors are separated in time. In a method of data transmission according to another embodiment of the invention, signals on adjacent conductive paths pass...
10/27/2009
7508881Current mode differential transmission method and system for transmitting three units of data using four signal lines
Provided are a current mode differential transmission method and system for differentially transmitting three units of data using four signal lines. The method includes: dividing the four signal lines 1a, 1b, 2a and 2...
03/24/2009
7434134System and method for trellis decoding in a multi-pair transceiver system
A method and a system for decoding information signals encoded in accordance with a multi-state encoding scheme and transmitted over a multi-dimensional transmission channel by computing a distance of a received word from a codeword. One-dimensional (1D) input signa...
10/07/2008
7408993Digital communication extender system and method
An extender circuit for handling a communication signal transmitted over a transmission line includes a voltage clamp and a current booster circuit. The voltage clamp is connected to a receive end of the transmission line and is operable to clamp a reflection signal...
08/05/2008
7359259Method for transmission and reception of a data signal on a line pair, as well as a transmission and reception circuit for this purpose
Apparatuses and methods for transmitting and receiving a data signal on a line pair having a first transmission line and a second transmission line are provided. In one embodiment, a data signal which represents the data to be transmitted by means of a sequence of f...
04/15/2008
7355532voltage level coding system and method
We describe a voltage level coding system and method. The voltage level coding system includes a level encoder having an input to receive data segments coded using a first code and an output to supply second data codes indicating one of 2N plus at least o...
04/08/2008
7356311Wireless audio signal and control signal device and method thereof
A signal transmission arrangement includes a signal transmitter and a signal receiver wirelessly communicating with the signal transmitter. The signal transmitter includes a hybrid signal device to hybridize the audio signal with the control signal to form a consoli...
04/08/2008
7339502Method and device for transmitting data over a plurality of transmission lines
In the case of a method and a device for transmitting data units by way of a transmission medium that comprises at least three adjacent transmission lines, first of all a plurality of codes is supplied. Each code has a number of code sections that corresponds to the...
03/04/2008
7333516Interface for synchronous data transfer between domains clocked at different frequencies
The present invention provides an interface and method for synchronous data transfer between domains clocked at different frequencies. The interface includes a first latch for receiving data from a first domain clocked at one frequency when the first latch is select...
02/19/2008
7333553Tunable duobinary transmitter
An apparatus and method for tunably delaying a signal and using that delayed signal in a duobinary transmitter is described. The transmitted duobinary signal is representative of the binary signal, and is formed by, among other things, introducing into a copy of the...
02/19/2008
7328299Interface for compressed data transfer between host system and parallel data processing system
An apparatus and method for interfacing a host system having a system data bus, clock signals, and control signals to a parallel data bus is described. Setting configuration bits allows the interface apparatus to be programmed to operate as a transmitter or a receiv...
02/05/2008
7277491Data access arrangement using a high frequency transformer for electrical isolation
An electrical isolation barrier for use in a Data Access Arrangement uses a high frequency (HF) transformer 24 to provide isolation. An input signal, which may be analog or digital, is connected to a modulator. The analog output of the modulator is connected to the ...
10/02/2007
7269212Low-latency equalization in multi-level, multi-line communication systems
Low-latency equalization mechanisms for multi-PAM communication systems are disclosed that reduce delay and complexity in signal correction mechanisms. The equalization mechanisms tap into input signals for a multi-PAM signal driver, and compensate for attenuation a...
09/11/2007
7254198Receiver system having analog pre-filter and digital equalizer
A receiver system suitable for a local area network contains an analog pre-filter (207 or 619), an analog-to-digital converter (210), a digital equalizer (212), and a decoder (605). A symbol-information-carrying input analog signal...
08/07/2007
7248635Method and apparatus for communicating computer data from one point to another over a communications medium
The present invention is directed toward a communications channel comprising a link level protocol, a driver, a receiver, and a canceller/equalizer. The link level protocol provides logic for DC-free signal encoding and recovery as well as supporting many features i...
07/24/2007
7221711Multilevel data encoding and modulation technique
The multilevel data encoding and modulation technique uses a pair of complementary logic sets. In its most basic form, the sets are binary sets each containing a line level for a logical one and a line level for a logical zero for a total of four logic levels. The e...
05/22/2007
7199728Communication system with low power, DC-balanced serial link
A data communication system comprises a transmission line between first and second integrated circuits. An encoder on the first integrated circuit encodes an input data stream to produce a sequence of codewords, wherein codewords in the sequence are members of a set...
04/03/2007
7180957Technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system
A technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting f...
02/20/2007
7180958Technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system
A technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting f...
02/20/2007
7180959Technique for utilizing spare bandwidth resulting from the use of a code in a multi-level signaling system
A technique for utilizing spare bandwidth resulting from the use of a code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting from the use of a cod...
02/20/2007
7167523Spacial derivative bus encoder and decoder
A method and apparatus for providing efficient and accurate electronic data transmission of information on a data bus in the presence of noise. Data signals are received on a plurality of input lines by a spacial derivative encoder. The spacial derivative encoder en...
01/23/2007
7162672Multilevel signal interface testing with binary test apparatus by emulation of multilevel signals
Error detection mechanisms for devices that have multilevel signal interfaces test multilevel signals of an interface with a binary test apparatus. The error detection mechanisms include converting between multilevel signals of the interface and binary signals of th...
01/09/2007
7155469Method of correcting physical impairments of a programmable filter
In some embodiments of the present invention, a known input signal is fed to a programmable filter. The output of the filter is compared to a calculated desired output for the same or similar input, and the difference between the outputs may be used to define correc...
12/26/2006
7149242Communications system for improving transmission rates and transmission distances of data signals across communications links
A communications system includes a transmitter device, a receiver system, and a communications link. The communications link couples the transmitter device and the receiver system. The receiver system includes a receiver device and a processor. The transmitter devic...
12/12/2006
7142612Method and apparatus for multi-level signaling
A system transmits data on a multi-conductor signal path, which produces a current flow based on the value of the data transmitted. The system reduces changes in current flow between successive data transmissions by encoding data values represented by sets of N bits...
11/28/2006
7139344Method and apparatus for effecting synchronous pulse generation for use in variable speed serial communications
A method for effecting synchronous pulse generation for use in variable speed serial communications is provided. The method includes the steps of obtaining a communication link speed; generating a difference signal representing a signal level difference between at l...
11/21/2006
7136421Circuit for compensating a degraded signal and associated method
A signal compensation circuit and associated method dynamically compensate for signal baseline wandering in a transmission line. The compensation circuit has a detection circuit and a correction circuit. The detection circuit first compares a transmission signal wit...
11/14/2006
7133425Communication system
A method and apparatus is disclosed for facilitating high-speed data communication. In one embodiment a receiver is configured to include error correction coding in an interleaved environment to increase data transmission rates. In one embodiment the signal mapping ...
11/07/2006
7133648Bidirectional multi-gigabit transceiver
Method and apparatus for a bidirectional transceiver cell is described. Each bidirectional transceiver cell has a transmitter and a receiver, where the transmitter and the receiver share a phase-locked loop. The bidirectional transceiver cell is configured to act as...
11/07/2006
7126408Method and apparatus for receiving high-speed signals with low latency
An apparatus and method for receiving high-speed signals having a wide common-mode range with low input-to-output latency. In one embodiment, the receiver includes an integrator to accumulate charge in accordance with an input signal during an integration time inter...
10/24/2006
7113550Technique for improving the quality of digital signals in a multi-level signaling system
A technique for improving the quality of digital signals in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for improving the quality of transmitted digital signals in a multi-level signa...
09/26/2006
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