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7624308 |
Failed message error recovery using application specific error queues
The present invention extends to methods, systems, and computer program products for failed message error recovery using application specific error queues. An application message, a reference to a...
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7508873 |
Digital amplifier, pulse width modulator thereof and method for reducing pop noise for the same
A pulse width modulator for use in a digital amplifier, includes a pop noise reducer for reducing pop noise by controlling a width and a phase of a pulse of a PWM signal output from the pulse width...
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7505395 |
Parallel pulse code modulation system and method
The present invention provides a parallel pulse code modulation system enabling the independent control of a plurality of groups of one or more electronic devices. A memory unit receives control...
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7505516 |
Ultra wide band (UWB) synchronisation search
An apparatus with ultra wide band (UWB) applications such as radar, position tracking and communications, for example Ground Penetrating Radar (GPR) and Wireless Personal Area Networking (WPANs)....
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7489621 |
Adaptive puncturing technique for multicarrier systems
Various embodiments are described for adaptive puncturing techniques involving an adaptive bit loading block to select a modulation scheme and a puncturing pattern for each of a plurality of...
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7487266 |
Communication system and method, and distributed control system and method
A communication system performs bidirectional communication through a same communication path every communication cycle period between a master station and a slave station. From the start of the...
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7483365 |
Process for obtaining notches in the transmission of signals over the electricity network
This permits the transmission of signals over the electricity network in such a way that the spectral density of power is adjusted to the regulations in the current rules by means of the...
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7447145 |
Data communication device selecting modulation method with an appropriate threshold value in adaptive modulation
There is provided a digital communication device for performing data communication by selecting an appropriate modulation encoding method. Quality measurement means measures the line quality of...
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7391716 |
Semiconductor integrated circuit and data transmission system
A semiconductor integrated circuit which transmits voice data as ancillary data while maintaining transmission quality without increasing the number of transmission cables in a system for carrying...
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7330662 |
System and method for remote optical digital networking of computing devices
The extended range of optical data communication is enabled through the use of intermediary relay stations spaced fairly far apart. IRDA communicatiOn, as is well known, uses very short duration...
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7286599 |
Method and design of data communications transceiver for ultra wide band (UWB) operation in 3.1 GHz to 10.6 GHz frequency band
An ultra wide band (UWB) communication system includes a channel filter bank to cover the 3.1 to 10.6 GHz band in channels having approximately equal bandwidth. A transmitter and a receiver may...
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7266077 |
Serial digital communication system and method
A serial digital communication system includes a master device and a plurality of slave devices connected serially between the master device's output and input—thereby forming a closed chain....
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7200187 |
Modulator for digital amplifier
A digital modulator for driving a digital amplifier. The digital modulator has a subtractor which receives a digital input signal. A filter amplifier receives the output of the filter amplifier and...
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7184480 |
Digital PWM generator
A digital PWM circuit is provided. One exemplary circuit includes a binary counter, an n-bit DAC and a comparator. The binary counter generates a plurality of binary signals in increasing and/or...
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7079577 |
Wide window decoder circuit for dual phase pulse modulation
A dual phase pulse modulation (DPPM) decoder circuit processes a DPPM signal, which is in the form of a series of high and low pulses whose pulse widths represent successive groups of M data bits,...
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7061979 |
System and method for determining the data rate of a digital data stream
A system and method for determining a minimum pulse width for a digital data stream is described herein. The minimum pulse width is used to infer the data rate for the digital data stream. A...
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7003032 |
Generation of multiple independent high resolution pulse width modulations
A method for generating multiple high-resolution PWM signals in which software interrupts are introduced at predetermined intervals to generate multiple high-resolution PWM signals from a...
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6961305 |
Polarity-alternated pulse width CDMA and method for measuring distance using the same
Disclosed is a method for modulating data for a polarity alternated pulse width code division multiple access (PAPW/CDMA) system and a method for measuring a distance between communicating...
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6959052 |
Receiving apparatus, receiving method, program and information recording medium
A channel evaluator acquires a change predicted value from a known symbol, and a compensator compensates for a first symbol using the change predicted value. A demodulator restores a portion...
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6925115 |
Apparatus and method for safely handling asychronous shutdown of pulsewidth modulated output
An apparatus and method for safely handling asynchronous shutdown of pulsewidth modulated output. A shutdown circuit controls asynchronous shutdown of a pulsewidth modulated stage to ensure that...
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6741646 |
Modulation technique for transmitting a high data rate signal, and an auxiliary data signal, through a band limited channel
A digital data modulator is coupled to a source of a digital data signal having a data bit period, and a source of an auxiliary data signal. An encoder encodes the digital data using a variable...
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6642861 |
Arrangements having ternary-weighted parameter stepping
Ternary weighted arrangements, for example, arrangements (delay circuits, devices, systems) including a variable delay determined on a ternary basis for use in testing set-up and hold times of a...
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6577683 |
Method and device for generating signal constellations in PCM space for high speed data communication
A method and device for generating a constellation of Pulse Code Modulation (PCM) levels to represent digital data in a communication system. The constellation of Pulse Code Modulation levels are...
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6549085 |
Natural sampling method and device for RF pulse-width modulation
A device for implementing a method for generating a pulse width modulated signal based upon a natural sampling technique is disclosed. First, a complex baseband signal is received by the device....
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6532260 |
Pulse transmission device for use in long-distance communication
A device for transmitting a pulse signal via a metallic line to a receiver end at which equalization is applied to the received pulse signal. The device includes a waveform adjustment unit which...
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6526094 |
PWM Circuit
A PWM (Pulse Width Modulation) circuit of the present invention includes a reference pulse sequence generating section for outputting a reference pulse sequence, an up-down counter, a trigger...
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6473457 |
Method and apparatus for producing a pulse width modulated signal
A method and apparatus to produce a pulse width modulated (PWM) signal from pulse code modulated (PCM) data. In one embodiment, a crossing point of an analog signal with the ramp portion of a...
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6452960 |
Audio data transmission apparatus and method, audio data recording apparatus, and audio data recording medium
An audio data transmission and recording system and a recording medium according to the system. Gaps in the audio data are used to control the addition of spectrum-diffused data to the audio data....
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6421382 |
Pulse width modulation signal generator
A PWM signal generator allowing a desired combination of cycle and duty to be reliably generated from cycle and duty set values received from a CPU is disclosed. A cycle comparator compares a...
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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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6359525 |
Modulation technique for transmitting multiple high data rate signals through a band limited channel
A digital data modulator includes a source of a plurality of digital data signals having a common data bit period. A plurality of encoders each encode a corresponding one of the plurality of...
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6294980 |
Transponder with a frequency detector for protection of security-related data during contactless inductive communication, and an integrated circuit therefor
A transponder (1) for the contactless communication with a base station (2) comprises an antenna resonant circuit (10) for receiving a modulated HF signal (5), signal processing means (13) for...
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6169765 |
Apparatus and method for output signal pulse width error correction in a communications receiver
An output signal pulse width error correction circuit and method wherein errors in a data signal conforming to a communications protocol having a prescribed duty cycle are corrected by monitoring a...
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6064646 |
Data communication apparatus and method
In a first controller that runs a first control algorithm and a first interrupt service, wherein the first control algorithm includes a first series of commands repeatedly executed in sequence,...
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6038255 |
Receiver for pulse width modulated transmissions
In a receiver, a system and method are disclosed for providing improved detection of data from a transmitted sequence of pulse width modulated (PWM) pulses. The disclosed system includes a pulse...
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6018513 |
Communication control apparatus
A communication control apparatus, provided with an echo back comparison detecting unit (30) detecting something abnormal of communication data from itself or an abnormal state generated at a data...
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5940021 |
Apparatus and method for measuring a characteristic pulse width for a data channel in a data handling device
An apparatus and method for measuring a characteristic pulse width of a data channel for a data handling device, with particular application to an HDD having an automatic gain control amplifier for...
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5933453 |
Delta-sigma pulse width modulator control circuit
A delta sigma pulse width modulator control circuit uses a delta sigma modulator as a first stage to create a sequence of pulses representing an input control signal. A pulse width modulator...
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5926111 |
Pulsed width modulated remote signalling and location identification system for summoning a service industry worker
A system for summoning a service industry worker using pulsed width modulation for remote signalling having a number of signalling switches, each connected to a transmitter. When a switch is...
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5875244 |
Transmission apparatus for relaying different types of trunk signals
A transmission apparatus for relaying different types of trunk signals, including a central processing unit including a reception counter processor which is inserted between a pair of exchanges and...
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5870380 |
Method and apparatus for reception of signals from several transmitters wherein each transmitter is characterized by their output pulse train
The disclosure relates to a method of reception of signals from at least two transmitters (RCi), wherein for each transmitter the data ("0", "1") are represented by the time interval (T0i, T1i)...
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5859669 |
System for encoding an image control signal onto a pixel clock signal
A system for encoding control data onto a clock signal includes at least one clock cycle in the clock signal; a first transition in the at least one clock cycle, the first transition is from a...
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5818814 |
Method and apparatus for synchronizing and controlling remote receiver
A user headset is provided that is operable to contain an audio device (50) and a receiver (52). The receiver (52) is operable to receive both audio information on multiple channels and also data....
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5802187 |
Two-channel programmable sound generator with volume control
Disclosed is a programmable sound generator for generating digital outputs of tone and noise signals used for producing computer sound effects. The programmable sound generator includes at least...
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5740199 |
High speed wire-or communication system and method therefor
A communication system (5) provides an improved wired-OR connection for use in the bidirectional communication of information between two devices. A first device is a master host device (10) which...
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5623518 |
Method and circuit arrangement for transmitting binary data trains
A method and apparatus for transmitting binary data trains of 0 and 1 data bits, or combinations of these data bits over a communications network. The data bits are converted into pulses whose...
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5579299 |
Communications network, a dual mode data transfer system therefor
A link apparatus in a node of a multinode, collision-resolution, multiplexing communications system connected between a microcontroller (MCU) that receives measurand data from an input device such...
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5566207 |
Digital FM synthesizer for record circuitry
A digital synthesizer for record circuitry of, e.g., a VCR, is supplied with digital samples representing a video signal. A calculator stage, responsive to the digital samples calculates a sequence...
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5495469 |
Communications network, state machine therefor
A link apparatus in a node of a mulitinode, collision--resolution, multiplexing communications system connected between a microcontroller (MCU) and a integrated driver and receiver (IDR) of the...
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5485487 |
Reconfigurable counter and pulse width modulator (PWM) using same
A pulse width modulator (20) includes a reconfigurable counter (30) whose width is determined by mode control bits. In one embodiment, a decoder (24) decodes the mode control bits to provide...
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