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7619551 |
Audio codec, digital device and voice processing method
An audio codec is provided, comprising an analog to digital converter (ADC) operable to receive an analog input signal for producing a first digital signal, and a first decimator down samples the...
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7619550 |
Delta-sigma AD converter apparatus using delta-sigma modulator circuit provided with reset circuit resetting integrator
In a delta-sigma modulator circuit, an integrator integrates an input signal, and a quantization circuit quantizes the integrated signal with a predetermined quantization number, and outputs a...
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7619549 |
Methods and systems for reducing a sign-bit pulse at a voltage output of a sigma-delta digital-to-analog converter
For a sigma-delta digital-to-analog converter (SD DAC) that includes a voltage output and a low-pass filter having a given order, methods and systems for reducing a sign-bit pulse at the voltage...
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RE40971 |
Direct drive programmable high speed power digital-to-analog converter
A current source is provided according to the present invention. The current source includes N current sources configured in a parallel arrangement, wherein N is at least two. Each of the N current...
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7616143 |
Reconfigurable delta sigma analog-to-digital converter and customized digital filters with embedded flash FPGA and flash memory
An integrated circuit includes at least one analog input. A sample/hold circuit is coupled to the at least one analog input. A reconfigurable delta-sigma ADC is coupled to the sample/hold circuit....
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7616142 |
Sigma-delta modulated analog-to-digital converter having a changeable coefficient
A sigma-delta modulated analog-to-digital converter having an integrator with a first changeable coefficient and/or having an excess loop-delay circuit also having a second changeable coefficient....
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7616141 |
Digital-to-analog converter
Embodiments of a digital-to-analog converter are disclosed.
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7609189 |
Interface for hybrid sigma-delta data converter
A hybrid sigma-delta converter that includes a continuous-time circuit that processes an input signal and generates a first output signal, an interface circuit that receives the first output signal...
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7609188 |
Multi-standard analog-to-digital data conversion
Implementations related to multi-standard digital subscriber line analog-to-digital data conversion are described.
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7609187 |
ΔΣ modulator and ΔΣ analog-digital converter
The present invention provides a ΔΣ modulator of a frequency modulation system that can lessen the requirement of linearity for an oscillator. A ΔΣ modulator comprises an oscillating apparatus...
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7605733 |
Radio frequency ΣΔ-modulator
A radio-frequency ΣΔ-modulator comprises a first mixer in the forward path for down-converting the signals in this forward path with a local oscillator frequency and a second mixer in the...
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7605730 |
Analog-digital converting apparatus and radio communication terminal
An analog-digital converting apparatus includes: an analog-digital converting unit that performs a conversion from an analog input signal into a digital output signal; a buffer unit that temporary...
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7602325 |
Sigma delta analog to digital converter with internal synchronous demodulation
A sigma-delta (ΣΔ) analog to digital converter with internal synchronous demodulation responsive to a sample clock, reference clock and conversion clock including a sample switching circuit...
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7602252 |
Sigma delta modulator, fractional frequency synthesizer and sigma delta modulating method
There is provided a sigma delta modulator that outputs an output signal obtained by performing sigma delta modulation on an input signal, including: a plurality of accumulators that are serially...
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7598897 |
Superconductor analog-to-digital converter
A superconducting Analog-to-Digital Converter (ADC) employing rapid-single-flux-quantum (RSFQ) logic is disclosed. The ADC has only superconductor active components, and is characterized as being...
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7592941 |
Signal processing apparatus and signal processing method
Disclosed herein is a signal processing apparatus including: analog-to-digital conversion means for performing delta sigma modulation of generating a digital signal having a predetermined sampling...
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7590500 |
System for high dynamic range analysis in flow cytometry
A flow cytometer capable of using electronics to analyze a large dynamic range while avoiding and/or correcting traditional limitations of acquisition electronics. The invention allows for...
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7589649 |
Apparatus, method, and system for correction of baseline wander
Apparatuses, methods, and systems for compensating baseline offset in a read channel of an analog storage device. The apparatus generally includes an AC-coupling circuit configured to transfer an...
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7586429 |
Scrambling system for high resolution ditigal-to-analog converter
A scrambling system for a digital-to-analog converter (DAC) includes a DAC that receives a digital input word and a scrambling module that randomly selects at least one of a plurality of current...
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7583215 |
Semiconductor integrated circuit
The A/D converter converting an analog input signal into a digital output signal is constructed with a band pass ΔΣ modulator. The band pass ΔΣ modulator includes: a resonator showing a...
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7583214 |
Dynamic receive beamformer with oversampling for medical diagnostic ultrasound
Receive beamformers for receive beamforming ultrasound information include a plurality of channels. The received signals for each channel are oversampled for conversion to digital form, such as...
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7583213 |
Signal processing system capable of changing signal levels
A signal processing system for changing a level of an input signal to generate an output signal is disclosed. The signal processing system includes a shifter, a sigma-delta modulator, and a level...
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7580491 |
Quarter-rate clock recovery circuit and clock recovering method using the same
A quarter-rate clock recovery circuit includes a clock generator, a phase interpolation unit, a phase detector, and a controller. The clock generator generates first through fourth clocks having a...
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7576673 |
Increasing the dynamic range of pulse width modulation in analog to digital converters
This disclosure relates to adjusting a limit cycle frequency of a pulse width modulation in an analog to digital converter as a function of an input signal level to increase dynamic range.
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7576672 |
Adaptive Dynamic Range Control
Apparatus and method for processing signals. A sigma-delta modulator is used. An adaptive dynamic range controller is configured to adaptively adjust the dynamic range of a signal output from the...
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7576671 |
Mismatch-shaping dynamic element matching systems and methods for multi-bit sigma-delta data converters
A sigma delta modulator (SDM) data converter system is provided. The SDM data converter system comprises a signal path, a feedback signal path, and a multi-bit quantizer disposed in a feedforward...
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7576670 |
Sigma-delta analog-digital converter for an xDSL multistandard input stage
The invention relates to a sigma-delta analogue/digital converter for an xDSL multi-standard input stage for converting an xDSL signal into a digital output signal, where the sigma-delta...
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7576605 |
Low power output stage
Power consumption of an output stage such as a class-D output stage may depend on the amplitude and the activity of the signal being output. Here, control signals may be generated to independently...
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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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7570186 |
A/D converters based on sigma delta modulators and iterative methods
A system and method is provided to improve the performance of the sigma delta analog to digital converter (ADC). An input signal analog signal received though an input device is passed to a sigma...
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7570182 |
Adaptive spectral noise shaping to improve time to digital converter quantization resolution using dithering
A novel and useful apparatus for and method of improving the quantization resolution of a time to digital converter in a digital PLL using noise shaping. The TDC quantization noise shaping scheme...
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7567194 |
Delta sigma modulator and delta sigma A/D converter
With a delta sigma modulator of this invention, a plurality of clocks required to control a switching circuit can be easily generated and correlation among phases of the plurality of clocks can be...
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7567193 |
Continuous time delta-sigma modulator and electronic circuit including the same
An electronic circuit includes a digital-to-analog converter (DAC), and an active integrator. The DAC converts a digital output of the electronic circuit to an analog signal and feeds back the...
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7567192 |
Sigma-delta modulator
A sigma-delta modulator for forming a digital output signal representative of the magnitude of an analog input signal, the modulator comprising a modulation unit comprising: a summation unit for...
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7564389 |
Discrete-time, single-amplifier, second-order, delta-sigma analog-to-digital converter and method of operation thereof
A discrete-time, single-amplifier, second-order, delta-sigma analog-to-digital converter (DT-SADS ADC) and a method of operating the same. The DT-SADS ADC combines switched-capacitor input sampling...
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7564388 |
Power efficient equalizer design
A method of reading data is provided. The method includes receiving an analog signal, converting the analog signal to a one bit wide digital signal at a first sampling frequency, and downsampling...
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7561635 |
Variable coder apparatus for resonant power conversion and method
A noise-shaping coder with variable or reconfigurable characteristics is disclosed. In one exemplary embodiment, an improved apparatus for signal modulation is disclosed. The apparatus generally...
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7561088 |
Multi-loop data weighted averaging in a delta-sigma DAC
Methods and apparatuses enable generating an analog representation of an M-bit digital input. A DAC system receives the M-bit data word and generates a control signal to control the output elements...
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7561086 |
Electronic circuit for the analog-to-digital conversion of an analog input signal
Electronic circuit for the analog-to-digital conversion of the alternative current (AC) component of an analog input signal. The electronic circuit has a coupling device with an input and an output...
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7557742 |
Pipelined/cyclic architectures for analog-digital signal conversion
Methods and apparatus for the conversion of analog signals into digital signals using second order or higher sigma-delta modulators in pipelined or cyclic architectures.
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7557741 |
Overload detection unit with signal strength indicator to indicate an overload condition
A device is for digitally processing an input signal that is susceptible to variations in signal strength. The signal ( 48 ) is analog to digital converted into a bitstream signal ( 47 ), the...
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7554474 |
Feedforward sigma-delta ad converter with an optimized built-in filter function
The present invention relates to a receiver apparatus, analog-to-digital converter apparatus, and method of converting an analog input signal into a digital output signal, wherein an additional...
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7554473 |
Control system using a nonlinear delta-sigma modulator with nonlinear process modeling
A control system includes a nonlinear delta-sigma modulator, and the nonlinear delta-sigma modulator includes a nonlinear process model that models a nonlinear process in a signal processing...
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7554472 |
Sigma-delta modulator
A sigma-delta modulator arrangement is disclosed that has a mechanism for breaking down a data word of the input signal into subwords with a different significance. The disclosed sigma-delta...
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7548180 |
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...
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7548179 |
MASH sigma delta modulator
A Multi-stage noise shaping Sigma Delta Modulator (MSDM) and method of processing data using the MSDM are disclosed. The MSDM is capable of operating at high radio frequencies and is characterized...
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7548178 |
Method and apparatus for ADC size and performance optimization
A sigma delta analog-to-digital converter (ADC) to convert an analog converter input signal to a digital converter output signal. Multiple integrator stages, including at least a first and a final...
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7545303 |
Sigma-delta difference-of-squares RMS-to-DC converter with forward and feedback paths signal squaring
A sigma-delta difference-of-squares RMS-to-DC converter and method for performing such a conversion in which a square of an analog feedback signal is combined differentially with a square of an...
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7545301 |
Multi-bit delta-sigma modulator
A delta-sigma modulator having a first integrator for integrating an input signal; an analog-to-digital converter for converting the integrated signal into a digital signal; a delay circuit for...
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7541964 |
Analogue/digital converter microelectronic device for equalising charges
The disclosure relates to a microelectronic image sensor device comprising: at least one detector formed by at least one photo-detector element, at least one integration capacitor associated to the...
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