Bizarre Patents
Pillow with retractable umbrella
A pillow assembly having a supporting assembly and a retractable umbrella assembly that is easily transportable and allows a user to support his/her head while covering their face from sunlight.
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| Number | Title | Issue Date |
| 8144045 | Timing signal generator circuit for use in signal waveform measurement system for measuring multi-channel on-chip signals flowing on VLSI A timing signal generator circuit includes a DA converter converting an input digital value into an analog voltage, and a VT converter converting the analog voltage into a corresponding delay time. The DA converter includes a current source circuit, which supplies a... | 03/27/2012 |
| 8130128 | System and method for generating shaped noise In a particular embodiment, a circuit device is disclosed that includes a data generator adapted to output a random pulse sequence having a particular spectral shape. The data generator includes a feedback loop with a transfer function, the output of which may be al... | 03/06/2012 |
| 8125365 | Method for generating an analog signal generated by PWM signal, and system generating such signal A generation method of an analogue signal generated by a PWM signal whose cyclic ratio and period are parametrizable is discussed. It is thus possible choose the pair formed from the cyclic ratio and the period producing an analogue value that is the closest to the ... | 02/28/2012 |
| 8125366 | Integrating (slope) DAC architecture A current source is used to pre-charge a capacitor to a known value. The capacitor can then be connected to a unity gain buffer to provide a low cost DAC. The DAC can include a self-calibration stage to improve accuracy. The DAC can include two or more circuit branc... | 02/28/2012 |
| 8115663 | Mismatch-immune digital-to-analog converter In an embodiment, a digital-to-analog converter (DAC) includes inputs for receiving first and second signals encoded as a digital signal pair including overlapping low value portions that are substantially equal in duration to overlapping high value portions, within... | 02/14/2012 |
| 7965214 | System and method of changing a PWM power spectrum In a particular embodiment, a circuit device includes a pulse edge control circuit to receive at least one pulse-width modulated (PWM) signal from a PWM source. The pulse edge control circuit is adapted to selectively apply a phase shift operation to the at least on... | 06/21/2011 |
| 7952508 | Noise-shaped scrambler for reduced out-of-band common-mode interference Class-D amplifiers have evolved from using binary pulse-width modulation (PWM) modulators to three-level PWM modulators. Three-level PWM drivers for audio applications offer the benefits of eliminating costly elements at the output of an audio system. However, they ... | 05/31/2011 |
| 7924200 | 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 pulse edge control circuit coupled between the input and the output. Th... | 04/12/2011 |
| 7903015 | Cascaded DAC architecture with pulse width modulation An embodiment of the invention provides one or more cascade circuits that are cascaded together to form a cascaded circuit. The cascaded circuit reduces noise at an analog output of the cascaded circuit. Each of the cascade circuits contains a noise-shaping circuit,... | 03/08/2011 |
| 7821440 | 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 pulse edge control circuit coupled between the input and the output. Th... | 10/26/2010 |
| 7821439 | Programmable CAN bus to analogue signal converter A module (10) connects to a CAN bus in a motor vehicle and converts a CAN message into an analog signal that can be monitored by test equipment. The module also has wireless communication with a PDA (300) via a radio transceiver (28) to allow th... | 10/26/2010 |
| 7791521 | System and method of changing a PWM power spectrum In a particular embodiment, a circuit device includes a pulse edge control circuit to receive at least one pulse-width modulated (PWM) signal from a PWM source. The pulse edge control circuit is adapted to selectively apply a phase shift operation to the at least on... | 09/07/2010 |
| 7764213 | Current-time digital-to-analog converter A high resolution digital-to-analog converter comprises a programmable n-bit current digital-to-analog converter (IDAC), an m-bit programmable counter/timer, an integrator that converts the IDAC constant current charging a capacitor over time into an a precision (hi... | 07/27/2010 |
| 7760120 | Generation method of a variable analogue signal generated by a PWM signal and system generating such a signal The present invention relates to a generation method of a variation form of an analogue signal generated by a PWM signal whose cyclic ratio and period are programmable. A signal can thus be generated whose evolution is linear over time. A succession of generation st... | 07/20/2010 |
| 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 pulse edge control circuit coupled between the input and the output. Th... | 10/06/2009 |
| 7557744 | PWM driver and class D amplifier using same The objective of the invention is to provide a class D amplifier that can reduce aliasing noise. The class D amplifier has D/A converter 10 that operates at the first sampling frequency, and PWM driver 3 that receives the output from D/A converter 1... | 07/07/2009 |
| 7532141 | Pulse width modulation method and digital analogue converter using the same In a pulse width modulation method of the present invention, a digital signal is modulated and a pulse width modulation signal is generated in a pulse width modulator by using a digital signal output unit and the pulse width modulator The pulse width modulation meth... | 05/12/2009 |
| 7453387 | Pulse width modulation in digital power amplifier For PWM (pulse width modulation), a counter generates a count signal by counting a clock signal 2n times for one period of the count signal. A PWM circuit generates a PWM signal from an n-bit pulse code modulation (PCM) data. The PWM signal includes a fir... | 11/18/2008 |
| 7439893 | Delta sigma modulation D/A converting system By using a selector, an output of a delta sigma modulator having a quantizer for quantizing a signal is selectively supplied to one of a first D/A converter having a linear amplifier and a second D/A converter having a digital amplifier. Further, the number of quant... | 10/21/2008 |
| 7432842 | Multi-channel pulse width modulated signal interleave and inversion A multi-channel signal processing system reduces electromagnetic interference (EMI) by staggering pulse edges of one or more pulse-width modulated signals (PWM signals) to prevent pulse edge overlap with at least one of the other PWM signals and inverting at least o... | 10/07/2008 |
| 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 with the first digital input signal is modified based on the pulse w... | 06/24/2008 |
| 7382301 | Method and apparatus for converting PWM signal to analog output voltage A circuit for converting a duty cycle of a pulse width modulated signal to an analog value comprising a clock signal generator for generating a clock signal, a window generation circuit for generating a window signal synchronized with the pulse width modulated signa... | 06/03/2008 |
| 7379003 | Multi-channel display driver circuit incorporating modified D/A converters A multi-channel display driver circuit incorporating modified D/A converters has a plurality of digital comparators connected to a number generator. Each digital comparator has an output, a digital data input and a reference input. The reference inputs of all digita... | 05/27/2008 |
| 7368984 | Switching class A-B amplifier A circuit configuration and a method enables less-expensive bipolar switching devices to be employed in high-accuracy class D amplifiers. A constant-bias current is provided between the switching devices of a class D amplifier, and, through feedback or appropriate a... | 05/06/2008 |
| 7362251 | Method and system for digital to analog conversion for power amplifier driver amplitude modulation Aspects of a method and system for digital to analog conversion for power amplifier driver amplitude modulation are presented. Various aspects of the system may include circuitry that enables oversampling, within a single integrated circuit device, of each of a plur... | 04/22/2008 |
| 7358884 | Methods and systems for implementing a Digital-to-Analog Converter A self-contained DAC that is especially suitable for use as an IP core, particularly for SOC (System on Chip) implementation. Techniques are applied to employ certain circuits (such as arithmetic element 302) to perform multiple functions in the DAC, thereby ... | 04/15/2008 |
| 7333400 | Regulated low power control system for electrostatic actuators The invention concerns a control system for a servomechanism comprising a control member that can move between first and second positions defining a variable electric quantity respectively between a minimum quantity and a maximum quantity, characterized in that the ... | 02/19/2008 |
| 7327296 | Signal processing system with modified delta sigma modulator quantizer output signals to spread harmonic frequencies of pulse width modulator output signals The signal processing system includes a pulse width modulator (PWM) that receives input signals from a delta sigma modulator. The PWM generates an output signal having successive frames of PWM patterns. Modifying loop filter data, such as a loop filter output signal... | 02/05/2008 |
| 7327300 | System and method for generating a pulse width modulated signal having variable duty cycle resolution A system and method generate a pulse width modulated signal having variable duty cycle resolution. A hardware uses minimal hardware to improve the PWM duty cycle resolution up to 0, such that highest possible resolution of a waveform can be obtained, including a sin... | 02/05/2008 |
| 7321328 | Single bit DAC with tristate driver A method for producing an analog output from a digital input is described. A digital pulse train is received having an average value which is proportional to a digital conversion value. The digital pulse train is driven at a periodic interval to produce a modulated ... | 01/22/2008 |
| 7317758 | PCM-to-PWM converter The invention relates to a method and a device for converting a digital, pulse-coded signal (PCM) to a pulse-width-modulated signal (PWM), wherein the digital signal PCM, f(t) is multiplied by at least one derivative (f′(t), f″(t), . . . , f(n) (t)) o... | 01/08/2008 |
| 7307565 | Signal processing system with delta-sigma modulation and FIR filter post processing to reduce near out of band noise A signal processing system matches, within a band of near out-of-band frequencies, the frequency response trends of a delta sigma modulator noise transfer function (NTF) and frequency response trends of a low pass finite impulse response (FIR) filter to provide nois... | 12/11/2007 |
| 7301520 | Image display device and driver circuit therefor There is provided an image display device operating in response to the input of digital picture signals, in which the occupied area of a signal line driver circuit thereof is reduced, and the parasitic capacitance and resistance of input transmission lines of the di... | 11/27/2007 |
| 7301488 | Digital PWM controller for preventing limit cycle oscillations An apparatus and method for minimizing limit cycle oscillations within a switched power supply includes providing a programmable dither signal as an input to the digital control loop connected between an output and a control input of the switched power supply. The d... | 11/27/2007 |
| 7298309 | Digital-to-analog converter (DAC) using multiple PWMs and method thereof A digital-to-analog converter (DAC) for generating an analog output voltage according to a digital input value includes a plurality of pulse width modulation (PWM) units and a voltage generating unit. The digital input value includes a plurality of bit segments. The... | 11/20/2007 |
| 7294981 | Method of determining the position of the shaft of a drive motor for a roller blind The method of determining the position of the shaft of a direct current motor including an armature powered via brushes and a bar commutator and designed to drive a roller blind includes the following phases: detecting and counting... | 11/13/2007 |
| 7292171 | Method and device for the version of digital signals with heterogeneous formats and application thereof to the digital amplification of audio signals The invention relates to a method and device for the conversion of digital signals comprising a phase involving modulation with the aid of a vector lattice encoder. The inventive method comprises iterative steps which are performed on N output candidates, consisting... | 11/06/2007 |
| 7283012 | Tri-state pulse density modulator A tri-state pulse density modulator includes a first switch device coupled to a high voltage, and a second switch device coupled to a low voltage. An adder receives a pulse density modulation (PDM) input signal and a latched input signal to generate an output sum si... | 10/16/2007 |
| 7283011 | Method for performing dual phase pulse modulation A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2 | 10/16/2007 |
| 7283078 | Digital-to-analog converter A converter of a digital signal into a pulse-width modulated signal, comprising a first conversion unit receiving, at a first frequency, successive digital signals each having one of a first determined number of values, and providing first intermediary signals, at t... | 10/16/2007 |
