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7429941 |
Stabilization of sigma-delta converters
This disclosure relates to monitoring the output of one or more amplifying structures and providing an auxiliary input signal under certain conditions.
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7429940 |
Delta-sigma modulator circuit with limiter and method therefor
A delta-sigma modulator circuit with limiter and method provide extended dynamic range in noise-shaped pulse generators. A limiting circuit is provided to adjust the output of the quantizer of the...
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7428692 |
Parallel precoder circuit
A parallel precoder circuit executes a differential encoding operation on an n-row parallel input information series, and outputs an n-row parallel output information series, where 2≦n. Output...
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7425911 |
Signal-to-noise ratio when using fewer bits than the number of output bits of an analog to digital converter
Improving signal-to-noise ratio (SNR) when using fewer bits than the number of output bits of an ADC as digital representation of the strength of the samples of an input signal. In an embodiment,...
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7423567 |
Analog-to-digital converter (ADC) having a reduced number of quantizer output levels
An analog-to-digital converter (ADC) having a reduced number of quantizer output levels provides for reduced complexity and power consumption along with improved linearity. The analog-to-digital...
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7423568 |
Sigma delta modulator
A circuit for converting the capacitive signal change of a differential capacitor into digital signals, the circuit including a sigma delta modulator. The differential capacitor is a component of...
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7423566 |
Sigma-delta modulator using a passive filter
A sigma-delta modulator includes a discrete time circuit that receives a digital feedback signal and an input signal, where the input signal includes information and one or more analog input...
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7423573 |
Architecture combining a continuous-time stage with a switched-capacitor stage for digital-to-analog converters and low-pass filters
A digital to analog converter (DAC) includes a first continuous-time stage that receives an input signal associated with a digital signal and performs continuous-time digital-to-analog conversion...
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7420488 |
Apparatus and method for setting filter coefficient, and recording medium having a program recorded thereon
Echo preventing circuit includes first and second FIR filters. The outputs of the first and second FIR filters are converted into first and second analog signals. An input/output terminal outputs...
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7420493 |
Extended range delta-sigma modulator and delta-sigma power converter
Devices, systems, and methods for providing delta-sigma modulation in conjunction with analog-to-digital or digital-to-analog signal conversion are disclosed. The delta-sigma modulator and...
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7420494 |
Mismatch shaping Δ-Σ analog to digital converter system
A mismatch shaping ΔΣ analog to digital converter system includes a plurality of internal ΔΣ analog to digital submodulators to provide an output; a feedback circuit including a feedback...
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7420485 |
Sigma-delta modulator and method for sigma-delta modulation
A sigma-delta modulator is supplied with a data word and includes a first and at least one further modulation stage, each having at least two adders. The adders in the first modulation stage...
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7420491 |
Analog signal sampling system and method having reduced average input current
A novel sampling system having a sampling device responsive to an analog input signal and a reference signal for providing corresponding charges. A switching circuit is provided to supply the input...
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7417573 |
Sigma-delta circuit and related method with time sharing architecture
A sigma-delta circuit with time sharing architecture includes a coefficient generation element, a sigma-delta processing element, and a storage element. The coefficient generation element is used...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 );...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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