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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8189655 | Digital amplifier A digital amplifier amplifies an input signal from a tuner (107) which receives a broadcast wave of a set receiving frequency so as to suppress degradation of the high-band reproduction performance and lowering of the amplification efficiency. The digital amp... | 05/29/2012 |
| 8179957 | Quadrature pulse-width modulation methods and apparatus Switched-mode amplifiers and devices having such amplifiers include quadrature pulse-width modulation that is based on cartesian (as opposed to polar) coordinates. Two sets of pulses that represent respective in-phase and quadrature components of a conventional cart... | 05/15/2012 |
| 8149908 | Method and device for controlling peak power and pulse width of a broadband gaussian pulse high-power RF transmitter A device for generating a modulation signal for an RF pulse transmitter is disclosed. The device includes a detector, a video amplifier, an analog processing device, and a modulation signal generating device. The modulation signal generating device is configured to ... | 04/03/2012 |
| 8144761 | Pulse transmission method, pulse transmission system, transmitter, and receiver A pulse transmission method for transmitting data by using pulse signals, each having a predetermined pulse width; defining a symbol time at least N times the predetermined pulse width, N being at least 2; defining a basic delay time calculated by dividing the prede... | 03/27/2012 |
| 8144760 | Pulse width modulation circuits and methods Noise reducing circuitry may be included in a pulse width modulation circuit. The pulse width modulation circuit may include a comparator adapted to receive an analog signal and a sawtooth signal and to compare such signals to generate a pulse width output. In gener... | 03/27/2012 |
| 8139631 | Method for transmitting data In a method for transmitting data using a predetermined data protocol between a first electronic control unit and a second electronic control unit in a motor vehicle, in which a data protocol is transmitted in the form of a pulse-pause sequence via a single electric... | 03/20/2012 |
| 8116368 | PWM signal generator, PWM signal generating device, and digital amplifier In a full digital amplifier for an audio amplifier or the like, it is possible to suppress the concentration of an electromagnetic noise emission spectrum at a specific frequency. A sampling period variation type digital filter is realized by varying the coefficient... | 02/14/2012 |
| 8098726 | Subranging for a pulse position and pulse width modulation based transmitter Briefly, in accordance with one or more embodiments, in a pulse position and pulse position modulation out-phasing transmitter, the range of the phase angle, theta, may be divided into more than one range to drive a first power amplifier with a first range of theta,... | 01/17/2012 |
| 8068540 | Cartesian modulation system via multi-level pulse width modulation A system and method for Cartesian modulation achieved via generation of a three-level pulse width modulated signal. The system in overview comprises two binary pulse width modulated signal generators receiving signals related to the in-phase and quadrature component... | 11/29/2011 |
| 8064513 | Pulse generator, communication device, and pulse generation method A pulse generator which, by generating a carrier wave having a certain frequency over a predetermined unit duration time, generates a modulated pulse signal, having a pulse width regulated by the unit duration time, which bears information contained in a baseband si... | 11/22/2011 |
| 8059708 | Pulse width digitizing method and pulse width digitizer using thereof A pulse width (PW) digitizer comprises a current pump, a capacitor, a quantizer, a feedback controller, and a digital filter. The current pump provides a current signal in response to a PW signal. The capacitor obtains a voltage signal in response to the current sig... | 11/15/2011 |
| 8054878 | Apparatus and method for amplifying signal power in a communication system A transmitter is provided for amplifying signal power in a communication system. The transmitter includes a single-tone signal generator for generating a single-tone signal; a baseband signal generator for generating a baseband signal; a bias modulator for switching... | 11/08/2011 |
| 8050319 | Signal generating apparatus and related method The signal generating apparatus includes a signal modulating unit, a selection signal generating unit, and a phase adjusting unit. The signal modulating unit is utilized for processing a modulation upon an input signal to generate a modulated signal. The selection s... | 11/01/2011 |
| 8000385 | Multiple devices communicating on a single communication channel with a consecutively sequenced signal The present invention provides apparatuses, methods, and computer readable media for supporting communications for a plurality of transmitter-receiver pairs on a common frequency spectrum. A transmitting device transmits a consecutively sequenced signal sequentially... | 08/16/2011 |
| 7953145 | Pulse width modulation signal generating circuit A PWM signal generating circuit outputs a stable PWM signal for increasing and decreasing a duty ratio at a predetermined rate within a predetermined period without requiring an improvement of a process capacity of a CPU as compared to a conventional PWM signal gene... | 05/31/2011 |
| 7933324 | Power regulator Method and system of power regulating, such as but not limited to attenuating signal power levels. The power regulating being suitable for use in any number of application, environments, and circuits, including but not limited to those associated with a universal ga... | 04/26/2011 |
| 7933325 | Antenna driving apparatus A transmitter portion 14 includes a control circuit 32, a driver circuit 33, and a wave detector circuit 35. The control circuit 32 generates control signals Vp, Vn based on a pulsed transmission signal So. The driver circuit 33... | 04/26/2011 |
| 7907664 | Digital adaptive feedforward harmonic distortion compensation for digitally controlled power stage Systems and method to compress digital video based on human factors expressed as a desirability score are provided. A particular method includes passing a digital input signal through a pulse-width modulator and passing an output of the pulse-width modulator through... | 03/15/2011 |
| 7889787 | Ultrasound transmit beamformer integrated circuit and method The invention provides a novel method of transmit beamforming, which allows compact analog implementation of complex digital algorithms without compromising their features. It is aimed to support envelope shaping, apodization, and phase rotation per channel and per ... | 02/15/2011 |
| 7869499 | Variable-frequency circuit with a compensation mechanism The present invention discloses a variable-frequency circuit with a compensation mechanism, which comprises: a load sensing/decision unit, a frequency-division unit and a level modulation unit. The present invention applies to a power supply having a frequency-divis... | 01/11/2011 |
| 7848406 | 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) selects one of the delay cell outputs at any one time.... | 12/07/2010 |
| 7822115 | Systems for generating a pulse width modulated signal Systems in accordance with the presently claimed invention use input data to create an output pulse that is a fraction of the width of an input pulse. In some embodiments, the invention accepts input data and an input signal that has pulses of a specific frequency. ... | 10/26/2010 |
| 7809056 | Spread spectrum device and related random clock generator for a switching amplifier A random clock generator for a spread spectrum modulating device includes a random number generator for generating a plurality of random number signals according to a first square wave signal and a control signal, a reference wave generator coupled to the random num... | 10/05/2010 |
| 7778324 | System for dynamic time offsetting in interleaved power amplifiers A system for controlling the delay applied to one branch of a pulse width modulation amplifier. The delay typically incorporated whether input signal level is low and diminished when the input signal level increases. The system may be implemented using a switch, a l... | 08/17/2010 |
| 7764734 | Digital pulse width modulation with variable period and error distribution Digital pulse width modulation with variable period and error distribution that improves the tradeoff between resolution and clock speed in pulse width modulation circuits so that a higher resolution can be achieved with a lower clock speed. A preferred method inclu... | 07/27/2010 |
| 7751471 | Pulse width modulation regulator system with automatically switching pulse skipping mode A pulse width modulation (PWM) Regulator System with automatically switching pulse skipping mode (PSM) is disclosed. The PWM regulator system comprises a PWM regulator, a PSM switching module and a pulse generator. The PWM regulator converts the input voltage by PWM... | 07/06/2010 |
| 7746926 | Pulse width modulation regulator system with automatically switching pulse skipping mode A pulse width modulation (PWM) Regulator System with automatically switching pulse skipping mode (PSM) is disclosed. The PWM regulator system comprises a PWM regulator, a PSM switching module and a pulse generator. The PWM regulator converts the input voltage by PWM... | 06/29/2010 |
| 7706439 | Signal transmitting and receiving method over wireless network and a reader A signal transmitting and receiving method in a wireless network use a reader creates a pulse width list relating to pulse widths of transmission signals; transmits signals in sequence according to the created pulse width list; and receives a reply signal with respe... | 04/27/2010 |
| 7706438 | Circuits and methods for reducing noise and distortion in pulse width modulation systems A pulse width modulation system including a pulse width modulation stage for generating a pulse width modulated signal in response to an input signal and an other pulse width modulation stage for generating an other pulse width modulated signal in response to an oth... | 04/27/2010 |
| 7684482 | Single wire communication circuits and methods Embodiments of the present invention include systems and methods of control using a single wire. The systems and methods presented allow sending or receiving commands and data through a single wire. In one embodiment, commands and data are received by the control sy... | 03/23/2010 |
| 7668239 | System and method for transmit timing precompensation for a serial transmission communication channel An improved method and apparatus for transmitting digital signals in a communications channel by compensating for distortions due to attenuation of high frequency components suffered by the digital signals. In a preferred embodiment, the digital signals are pulses a... | 02/23/2010 |
| 7656946 | Pulse width modulation amplifier The invention provides a pulse width modulation amplifier that includes a correction circuit, an envelope detector, a level detector, a PWM carrier generator, an interpolation arithmetic circuit, and a PWM circuit. The envelope detector detects an envelope of digita... | 02/02/2010 |
| 7649935 | Digital adaptive feedforward harmonic distortion compensation for digitally controlled power stage A digital timing read back and an adaptive feedforward compensation algorithm to reduce harmonic distortion is disclosed. More specifically, the approach generates harmonic components digitally with the same magnitude but at an opposite phase to the output harmonic ... | 01/19/2010 |
| 7646808 | Allowing immediate update of pulse width modulation values A pulse width modulation (PWM) generator having asynchronous updating of its PWM duty cycle and/or period values allows immediate correction for the new PWM duty cycle and/or period values instead of waiting until the end of a PWM period to accept the new duty cycle... | 01/12/2010 |
| 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) selects one of the delay cell outputs at any one time.... | 12/01/2009 |
| 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 and absolute value domain. The converting produces a converted signal... | 09/15/2009 |
| 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 for transmission across the interconnecting medium. The receiver det... | 06/23/2009 |
| 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 provides a digital data transfer method for alternately and periodica... | 05/19/2009 |
| 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 modulator, wherein the pop noise reducer contains: a PWM pulse regis... | 03/24/2009 |
| 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). An apparatus synchronises a receiver to a received UWB signal having a... | 03/17/2009 |
