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7626519 |
Pulse-width modulation of pulse-code modulated signals at selectable or dynamically varying sample rates
Digital audio circuitry including modulation circuitry ( 35; 135 ) for generating a pulse-width modulated (PWM) signal from processed pulse-code modulated (PCM) audio signals. The modulation...
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7627032 |
Digital pulse width modulator
A DPWM ( 1 ) has a delay lock loop ( 4 ) which receives an input clock signal and provides an out-of-phase delayed clock at the output of each of eight delay cells ( 35 ). A multiplexer ( 5 )...
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7620095 |
RF modem utilizing saw device with pulse shaping and programmable frequency synthesizer
A bidirectional direct sequence spread spectrum half-duplex RF modem. that can be applied to transmit and receive numerous types of analog and digital pulse modulation. The modem incorporates a SAW...
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7613255 |
Method for estimating communication conditions affecting an UWB wireless link
The present invention relates to a method for transmitting data by means of at least one pulse sequence carried by a radio signal, in the course of which a power value representative of an amount...
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7598895 |
System and method of altering a PWM carrier power spectrum
In a particular embodiment, a circuit device includes an input to receive a pulse-width modulated (PWM) signal and an output to send a modulated PWM signal. The circuit device further includes a...
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7590087 |
Methods for wireless data transmission between a base station and one or more transponders
A method and device for wireless data transmission between a base station and one or more transponders, in which electromagnetic carrier waves are emitted by the base station and symbols are...
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7590177 |
Method and system for receiving pulse width keyed signals
Provided is a method to process a pulse width coded signal. The method includes digitizing a received pulse width coded signal and transforming the digitized signal to at least one of power domain...
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7587002 |
Wireless transmitting and receiving device and method
A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas, wherein a signal...
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7580532 |
Multi-channel pulse width modulation apparatus
Disclosed are multi-channel PWM (Pulse Width Modulation) apparatuses and methods for modulating PCM-based multi-channel audio signals read from an optical medium into PWM-based multi-channel audio...
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7570713 |
System and method for anticipatory receiver switching based on signal quality estimation
A system and method of switching from a first receiver receiving a constant bit rate signal to a second receiver receiving the constant bit rate signal, where the constant bit rate signal received...
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7570576 |
Detection and mitigation of temporary (bursts) impairments in channels using SCDMA
Systems and methods are disclosed for detecting and mitigating temporary high-level impairments, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic...
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7570693 |
Low noise digital to pulse width modulated converter with audio applications
The present invention relates to digital-to-analog conversion. In particular, it has application to conversion of pulse code modulated signals, such as used in CDs and DVDs, to a pulse width...
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7561808 |
System and method of using variable pulses for symbology
A method and system for storing and transmitting data using variable pulse symbology over a fiber optic or ultra wide band system. Data is stored in memory, accessed and transformed into an...
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7551669 |
System for multiplexing independent signals
A system for multiplexing multiple independent signals includes a transmitter, interconnecting medium, and a receiver. The transmitter encodes a waveform with first and second pieces of information...
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7535957 |
Transmitter circuit, receiver circuit, clock data recovery phase locked loop circuit, data transfer method and data transfer system
[Problems] To realize a reliable and stable transfer of digital data that does not require a reference clock and a handshake operation. [Means for Solving the Problem] The present invention...
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7532082 |
Synchronization circuit for synchronizing PWM modulators
A synchronization circuit for synchronizing at least two self-oscillating PWM modulators, each outputting a respective pulse-width-modulated output signal comprising signal pulses with signal pulse...
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7518349 |
Current multiplier/divider-configured feed-forward compensation for buck-mode converter controller with programmed switching frequency
A current multiplier/divider-configured, feed-forward compensation circuit for a pulse width modulator (PWM) controller for a buck-mode DC-DC converter is operative to achieve constant loop gain...
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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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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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7495428 |
Pulse generator, timing generator, and pulse width adjusting method
The present invention provides, a pulse generator, which is configured so as to generate pulses with a predetermined pulse width, comprises: multiple pulsers each of which is configured so as to...
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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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7483483 |
Ultra-wideband communication apparatus and methods
Apparatus and methods of ultra-wideband communication are provided. In one embodiment, a communication frame is generated and includes a synchronization section, and at least two data sections and...
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7479840 |
Digital pulse width controlled oscillation modulator
A pulse width modulator ( 10 ) for converting a digital signal into a PWM signal, comprising a plurality of integrators ( 11 ) with integrator gains ( 12 ) arranged in series, a comparator ( 17 )...
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7480331 |
Method and device for pulse width modulation
A method and a device are proposed for the conversion of a quantized signal into a pulse width modulated signal, wherein dependent on a signal value of the quantized signal in each case a pulse...
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7480330 |
Method and apparatus to perform modulation using integer timing relationships between intra symbol modulation components
A method and apparatus to improve modulation efficiency for chip to chip interconnects. Modulation objects that are integer multiples of a fundamental time unit (FTU) are used to populate a symbol...
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7457617 |
CMOS wireless transceiver with programmable characteristics
A monolithic radio integrated circuit includes a substrate, a set of one or more analog subcircuits on the substrate, a programmable bias current supply on the substrate coupled to the set to...
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7453298 |
PWM controller and method therefor
In one embodiment, a PWM controller is configured to form a control signal that has reduced noise. The control signal is used to adjust a frequency of a clock signal of the PWM controller.
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7451026 |
Control unit for controlling and/or regulating at least one vehicle function
A control unit for controlling and/or regulating at least one vehicle function, including at least one computing element and one transceiver for connecting the control unit to at least one data...
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7433403 |
Pulse width modulation method for a power converter
A pulse width modulation method has the steps of operating a second instruction signal so that each of the differences between two or three arbitrary instruction signals in three first instruction...
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7433404 |
Apparatus for higher resolution pulse width modulation duty cycle
A pulse width modulation (PWM) generator featuring very high speed and high resolution capability and the ability to generate standard complementary PWM, push-pull PWM, variable offset PWM,...
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7430252 |
Apparatus and method for WGIO phase modulation
An apparatus and method for WGIO phase modulation are described. In one embodiment, the method includes the receipt of a high-speed data stream, encoded according to an 8 b /10 b code. Once...
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7426123 |
Finite state machine digital pulse width modulator for a digitally controlled power supply
A method is disclosed for generating pulse width modulated pulse control signals for controlling switches in a switching power supply. First, a count value is determined of a master clock within a...
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7425853 |
Systems and methods for pulse width modulating asymmetric signal levels
Systems and methods for pulse width modulating waveforms to represent asymmetric signal levels using pulses that are symmetric within their respective switching periods. One embodiment comprises a...
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7420824 |
Method of designing an RPWM inverter with unwanted harmonic elimination
A method of designing a random pulse width modulation (RPWM) inverter with unwanted harmonic elimination, which first uses a Fourier analysis and a numerical analysis to eliminate the unwanted...
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7418297 |
Frame length modulation and pulse position modulation system
A system includes a transceiver circuit to transceive at least a first analog signal and a digital signal. The system also includes a controller circuit, coupled to the transceiver circuit, to...
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7394311 |
Apparatus and method for reduced sample rate class S RF power amplifier
A Class S RF power amplifier for use in a radio frequency (RF) transmitter. The Class S power amplifier comprises a delta-sigma modulator that receives an analog modulated RF carrier and generates...
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7394875 |
Beaulieu series approach to optimal UMTS RACH preamble detection estimation
A method for preamble detection in mobile unit to base unit wireless telephony sets a preamble detection threshold based upon a Beaulieu series computation dependent upon preamble correlation data....
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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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7392044 |
Wireless appliance communication with detection and capture algorithm
A communication arrangement for a household appliance device. The arrangement includes a first communication part including a transmitter for transmitting a wireless signal, and a second...
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7391346 |
Switching amplifier system and method
A switching amplifier system and method is disclosed. In a particular embodiment, a pulse width modulation frame size is determined based on a sample rate of a digital input signal. Data associated...
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7391280 |
Circuit and method for pulse width modulation
A circuit and a method for performing pulse width modulation are provided. A pulse density modulator (PDM) is applied to receive the least N bits of the input data and to generate a pulse density...
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7388911 |
In-band-on-channel broadcast system for digital data
An FM broadcast transmitter transmits a broadcast signal having a carrier at a broadcast frequency and sidebands, able to be transmitted at full power, within a transmission bandwidth around the...
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7386045 |
Dynamic differentiated link adaptation for ultra-wideband communication system
Optimum usage of time diversity and significantly higher data rates are achieved by utilizing an adaptive Ultra-wideband impulse radio (UWB IR) transmission scheme based upon information about the...
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7382829 |
Constitution of a receiver in an ultra-wideband wireless communications system
This invention has as its object to implement the constitution of a receiver that receives signals sent by performing multi-valued pulse modulation and performs iterative decoding. The constitution...
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7379016 |
Carrier phase detection system for radar sensors
A pulse detection system for expanded time radar, laser and TDR sensors detects specific cycles within bursts of cycles. A sensor transmits and receives short bursts of RF cycles. A transmit pulse...
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7376182 |
Digital processor with pulse width modulation module having dynamically adjustable phase offset capability, high speed operation and simultaneous update of multiple pulse width modulation duty cycle registers
A pulse width modulation (PWM) generator featuring very high speed and high resolution capability and the ability to generate standard complementary PWM, push-pull PWM, variable offset PWM,...
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7376208 |
Reception method for packetized information with automatic repeat request
A decoding method is carried out in a receiver configured to accept format information relating to sequences of input data, to use format information in the decoding of each input sequence, and to...
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7372902 |
Pulse with modulation signal generating circuit
A PWM signal generating circuit outputs a stable PWM signal for increasing and deceasing a duty ratio at a predetermined rate within a predetermined period without requiring an improvement of a...
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7369609 |
Duty factor encoded data and clock transmission
A method, apparatus, article of manufacture, and a memory structure for transcieving data and a clock on a single data stream. The method comprises the steps of receiving an encoded data stream,...
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7352807 |
Apparatus and method for generating pulse based on time delay and wave transform and transmitter of multi-frequency band communication system using the same
Disclosed is an apparatus and method for generating pulse based on time delay and wave transform and transmitter of multi-frequency band communication system using the same. The apparatus includes:...
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