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7414557 Method and apparatus for feedback signal generation in sigma-delta analog-to-digital converters  
A method and apparatus taught herein provide a digital-to-analog converter (DAC) for use in a conversion feedback path of a sigma-delta type analog-to-digital converter (ADC). The DAC uses current...
7413342 DRAM temperature measurement system  
A converter comprising a comparator having a first input operable to receive a first signal, a second input operable to receive a second signal, and an output, a switch for sinking a portion of the...
7411534 Analog-to-digital converter (ADC) having integrator dither injection and quantizer output compensation  
An analog-to-digital converter (ADC) having integrator dither injection and quantizer output compensation reduces the probability of unchanging code sequences that occur when the input signal and...
7408494 Continuous-time delta-sigma analog digital converter  
A continuous-time delta-sigma analog digital converter for converting an analog input signal to a digital output signal, comprising an analog filter with at least one integration capacitor, a...
7408492 A/D converter for wideband digital communication  
Circuitry for providing non-uniform analog-to-digital (“A/D”) signal conversion for wideband signals is provided. The circuitry of the invention is optimized for wideband signals because it...
7405687 Continuous-time delta-sigma analog digital converter  
The invention relates to a continuous-time delta-sigma analog digital converter ( 10 ) for converting an analog input signal (IN) to a digital output signal (OUT), comprising an analog filter ( 20...
7405686 Methods and apparatus for implementing and/or using amplifiers and/or for performing various amplification related operations  
Methods and apparatus for implementing and/or using amplifiers and performing various amplification related operations are described. The methods are well suited for use with, but not limited to,...
7405685 Negative contributive offset compensation in a transmit buffer utilizing inverse clocking  
A novel method and apparatus for a negative contributive offset compensation mechanism for a transmit buffer adapted to compensate for the positive offset generated by higher order sigma-delta...
7405682 Delta-sigma analog digital converter with offset compensation  
The invention concerns a time-continuous delta-sigma analog-digital converter for the conversion of an analog input signal into a digital output signal, comprising an analog filter for the...
7405629 Frequency modulator, circuit, and method that uses multiple vector accumulation to achieve fractional-N frequency synthesis  
A frequency synthesizer is provided having a fractional-N control circuit and method. The control circuit can operate as having a modulator that selectively applies any fractional ratio to a...
7403151 Switch control circuit, ΔΣ modulation circuit, and ΔΣ modulation AD converter  
A switch control circuit turns on/off second and third switches, while turning off/on first and fourth switches, in a complementary manner in an integrator constituted by using a switched capacitor...
7403144 Pulse domain encoder and filter circuits  
A pulse circuit to solve a system of differential equations in the pulse domain based on analog or inputs or time-encoded pulse inputs. Intrinsically linear 1-bit digital to analog converters are...
7400284 Low noise data conversion circuits and methods and systems using the same  
A circuit including a first element sampling noise from and discharging noise to a signal line in response to an input signal transitioning on selected edges of a clock signal. A second element...
7398450 Parallel precoder circuit  
A parallel precoder circuit executes an EXOR operation on an n-row parallel input, and outputs an n-row parallel output, where 2≦n. Outputs of EXOR circuits each of which having a largest column...
7397406 A/D Conversion circuit with carrier frequency removing feature  
The present invention is intended to fully remove a carrier-frequency component despite a compact low-cost configuration. An A/D conversion circuit with a carrier frequency removing feature...
7397405 Audio device arrangement structure for a motorcycle, and motorcycle incorporating same  
An audio device arrangement structure for a motorcycle is configured and arranged to provide high-quality sound output. The audio device arrangement structure serves to mount an audio device, which...
7397291 Clock jitter minimization in a continuous time sigma delta analog-to-digital converter  
A digital-to-analog converter adapted for use as a feedback converter in a continuous time sigma delta analog-to-digital converter. The digital-to-analog converter has a discrete time digital...
7394418 Apparatus comprising a sigma-delta modulator and method of generating a quantized signal-delta modulator  
A method of generating a quantized signal in a Sigma-Delta modulator ( 25 ) comprises the steps of feeding a modulator input signal to a quantizer ( 15 ) via at least one integrator ( 12, 13 );...
7391351 Bitstream controlled reference signal generation for a sigma-delta modulator  
When a reference signal is generated for a digital-to-analog converter in the feedback path of a sigma-delta modulator, the reference signal can contain modulated error signals, for example when...
7391350 Adaptive multi-bit delta and sigma-delta modulation  
An adaptive multi-bit delta and sigma-delta modulation and demodulation technique, wherein a one-bit modulator generates a binary output signal from an analog input signal and a multi-bit adapter...
7388533 Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor  
A digital-to-analog converter (DAC) for a sigma-delta modulator is provided. The DAC has a switched capacitor structure using an operational amplifier (OP amp) and performs a function exceeding...
7388530 A/D-converter  
The invention relates to at least one self-oscillating loop (SOL) comprising at least one forward path (FP), at least one feedback path (FBP) wherein said at least one forward path (FP) comprises...
7388438 ΣΔ modulator for PLL circuit  
A ΣΔ modulator for producing a modulation signal for modulating a frequency division ratio of a comparison frequency divider of a PLL circuit. A plurality of integrators connected in series...
7385540 Method for mixing signals with an analog-to-digital converter  
The invention provides a method for mixing signals with an analog-to-digital converter. The analog-to-digital converter receives a plurality of analog signals. First, the plurality of analog...
7385539 All-digital phase locked loop (ADPLL) system  
An all-digital phase locked loop system for generating an oscillator output signal under control of a digital reference input. The system comprises a digitally controlled oscillator, a digital loop...
7385538 Delta sigma modulator with multiple filters  
Methods and devices for an improved delta sigma modulator. The delta sigma modulator has multiple filters with at least one high order filter processing the MSBs of the quantizer fractional output...
7385537 Linear feedback shift register first-order noise generator  
A first-order signal generator ( 135 ). The generator comprises a shift register ( 210 ′) having a number N of bit positions. Each bit position is operable to store a binary value, the shift...
7382300 System-on-chip (SoC) integrated circuit including interleaved delta-sigma analog-to-digital converter (ADC)  
A system-on-chip (SoC) integrated circuit including an interleaved delta-sigma analog to digital converter (ADC) provides for reduced noise in the ADC conversions. The ADC is operated...
7379002 Methods and apparatus for a multi-mode analog-to-digital converter  
A multi-mode analog-to-digital converter includes a delta-sigma analog-to-digital converter circuit configured to receive the analog input and produce a digital bit-stream associated therewith, the...
7379001 Self-oscillating A/D-converter  
The invention relates to at least one self-oscillating loop (SOL) comprising at least one forward path (FP), at least one feedback path (FBP) wherein said at least one forward path (FP) comprises...
7379000 Floating gate digital-to-analog converter  
The present invention provides a DAC constructed from a series of floating gate devices which are programmable to a series of predetermined values. Addressing one or more of the programmed floating...
7378997 Method of reducing inter-symbol interference, a sigma-delta converter for performing this method and a storage medium conveying information generated by this method  
A method and arrangement of reducing inter-symbol interference occurring at the digital to analog conversion of a one bit digital signal is provided. During the generation of the one-bit digital...
7375666 Feedback topology delta-sigma modulator having an AC-coupled feedback path  
A feedback topology delta-sigma modulator having an AC-coupled feedback path reduces signal level in the loop filter, easing linearity requirements and reduces capacitor size requirements for the...
7375659 Multi-rate network transmission circuit  
A network transmitter and an associated transmitting method are disclosed. The network transmitter includes a signal converter and a signal driver. The former can convert an input signal into a...
7372385 A/D converter, signal processor, and receiving device  
An A/D converter which converts an analog current signal into a digital signal, includes: a filter removing a noise component from the analog current signal to output an analog voltage signal; a...
7372384 High-speed, high-resolution, low-power analog-to-digital converter  
An ADC and method comprises a hybrid-type sigma-delta modulator comprising a digital delta-stage and an analog sigma-stage, wherein the analog sigma-stage comprises an analog low-pass filter...
7372383 Method for calibrating a digital/analog converter and digital/analog converter  
A digital/analog converter comprises a converter array comprised of a plurality of converter cells and a device for self-calibration of the converter cells. The device for self-calibration...
7369071 Analog and digital signal mixer  
A mixer receiving a first analog signal and a first digital signal, corresponding to a succession, at a first frequency, of first messages each comprising a first number of bits, and providing a...
7369001 Frequency synthesizer having variable frequency resolution, and fractional-N frequency synthesizing method using sigma-delta modulation of frequency control pulses  
A fractional-N frequency synthesizer supporting multi-band operation, having variable frequency resolution obtained by sigma-delta modulating a multi-bit frequency resolution control signal having...
7365669 Low-delay signal processing based on highly oversampled digital processing  
A low-delay signal processing system and method are provided which includes a delta-sigma analog-to-digital converter, an oversampling processor, and a delta-sigma digital-to-analog converter. The...
7365668 Continuous-time delta-sigma analog digital converter having operational amplifiers  
The invention concerns a continuous-time delta-sigma analog-digital converter for the conversion of an analog input signal into a digital output signal, comprising an analog filter which filters...
7365667 Delta-sigma analog-to-digital converter (ADC) having an intermittent power-down state between conversion cycles  
A delta-sigma analog to digital converter (ADC) having an intermittent power down state between conversion cycles provides for power consumption savings when the converter is in a lower sample rate...
7362252 Bandwidth tunable sigma-delta ADC modulator  
A high order continuous-time Sigma-Delta Modulator (ΣΔM) is used for its high carrier-to-noise ratio (CNR) performance and low power consumption. The modulator is designed to allow zero-IF,...
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...
7362250 Dynamic dither for sigma-delta converters  
A sigma-delta converter having dynamic dithering that reduces or removes idle-channel tones and increase linearity of the converter. The dither is differentiated in multiple orders before being...
7362247 Digital correction of nonlinearity errors of multibit delta-sigma digital to analog converters  
Digital correction of multibit ADAC nonlinearities for error feedback DACs is provided. The integral nonlinearity (INL) error of the multibit ADAC is estimated (on line or off line) by a...
7359522 Coding of stereo signals  
A method of encoding a multi-channel signal having first and second signal components includes determining a set of filter parameters a prediction filter such that the prediction filter provides an...
7358885 Mixing DAC architectures for a radio frequency receiver  
A receiver ( 300 ) includes a mixing digital-to-analog converter (DAC) ( 118 A), a direct digital frequency synthesizer (DDFS) ( 132 ) and a dynamic element matching (DEM) circuit ( 304 ). A DAC of...
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...
7358881 Quantizer overload prevention for feed-back type delta-sigma modulators  
A digital signal processing system includes a delta sigma modulator that maintains a low pass output during quantizer overload prevention conditions. In at least one embodiment, the delta sigma...
Matches 1 - 50 out of 1779 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >