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| Number | Title | Issue Date |
| 8179294 | Apparatus and method for the calibration of delta-sigma modulators The application relates to a calibration apparatus and calibration method for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type. The calibration apparatus comprises: a resonator driver capable of causing an oscillating behavior i... | 05/15/2012 |
| 8169351 | Feedback circuits with DC offset cancellation Feedback circuits with DC offset cancellation are described. In an exemplary design, a feedback circuit includes a slow integrator and a summer. The slow integrator receives a first intermediate signal at a particular point in the feedback circuit and provides a sec... | 05/01/2012 |
| 8169352 | Jitter insensitive sigma-delta modulator A sigma-delta modulator for forming a digital output signal representative of a voltage level of an input signal, the sigma delta modulator having a node arranged to receive a current flow that is representative of the voltage level of the input signal and on whose ... | 05/01/2012 |
| 8164500 | Jitter cancellation method for continuous-time sigma-delta modulators A continuous-time delta-sigma analog-to-digital converter (ADC) is disclosed. The ADC includes a loop filter, a loop quantizer, and a clock-jitter tolerant digital-to-analog converter (DAC). The clock-jitter tolerant DAC includes a dual switched-current (SI) DAC, a ... | 04/24/2012 |
| 8159380 | Continuous-time sigma-delta analog-to-digital converter with non-invasive filter(s) for immunity preservation against interferers A continuous-time sigma-delta analog-to-digital converter (CV) comprises i) a signal path (SP) which includes at least one combiner (C1) for combining analog signals to be converted with analog feedback signals, at least one integrator (H1) for integra... | 04/17/2012 |
| 8144042 | Combinatorial circuit with shorter delay when inputs arrive sequentially and delta sigma modulator using the combinatorial circuit A combinatorial circuit with pre-calculation and having shorter delay is described. The combinatorial circuit uses information available from earlier input signals to pre-calculate intermediate signals, which are used to generate output signals when the last input s... | 03/27/2012 |
| 8130127 | Discrete-time delta-sigma modulator with improved anti-aliasing at lower quantization rates A discrete time delta-sigma modulator circuit, which may be used to implement an analog-to-digital converter (ADC) provides improved anti-aliasing performance when lower quantization rates are selected, by maintaining the clocking rate of a first stage in the delta-... | 03/06/2012 |
| 8125362 | Apparatus and associated methods for generating reference signals An integrated circuit (IC) includes a reference circuit. The reference circuit includes at least one controlled current source. The reference circuit further includes a sigma-delta modulator coupled to the at least one controlled current source. ... | 02/28/2012 |
| 8120518 | Digital feedforward sigma-delta modulator in analog-to-digital converter and modulation method thereof A digital feedforward sigma-delta modulator in an analog-to-digital converter and its modulation method are disclosed. The modulator changes a feedforward path from an analog domain to a digital domain and processes it. The modulator integrates an analog input by us... | 02/21/2012 |
| 8111179 | Method and system for reducing signal distortion in a continuously variable slope delta modulation scheme A rearview assembly includes a mounting structure for attaching to a vehicle. The mounting structure includes a housing that has a rearview element disposed inside for providing a driver of the vehicle with a view to the rear of the vehicle. The rearview assembly al... | 02/07/2012 |
| 8111180 | Analog to digital conversion using irregular sampling This disclosure relates to analog to digital conversion using irregular sampling. ... | 02/07/2012 |
| 8102291 | Sigma delta modulator and quantizer and quantization method thereof A quantizer of a sigma-delta modulator includes a pulse width modulator (PWM), a converter and a voltage level tracing device. The PWM receives an input signal, and generates a PWM signal according to one or more sawtooth waves and one or more reference voltages. Th... | 01/24/2012 |
| 8102290 | Sigma-delta modulator The present invention relates to a sigma-delta modulator to convert an analog signal into a digital signal using an analog-to-digital converter slaved in a closed loop. The undecided bits at the output of the analog-to-digital converter are assigned the same values ... | 01/24/2012 |
| 8102292 | Analog-to-digital converter (ADC) having a successive-approximation register digital to-analog converter (SARDAC) An analog-to-digital converter (ADC) having a successive-approximation register digital-to-analog converter (SARDAC) is described. ... | 01/24/2012 |
| 8094051 | Sigma-delta-based analog-to-digital converter An analog to digital converting device is proposed for generating a digital output signal of an RF analog input signal. The device comprises a first analog to digital converter stage, a mixer, a second analog to digital converter stage and a digital filter. The firs... | 01/10/2012 |
| 8089382 | Sampling/quantization converters Provided are, among other things, systems, methods and techniques for converting a continuous-time, continuously variable signal into a sampled and quantized signal. According to one representative embodiment, an apparatus includes multiple quantization-noise-shapin... | 01/03/2012 |
| 8081098 | Integrator, delta-sigma modulator, analog-to-digital converter and applications thereof In one embodiment, the modulator in an analog-to-digital converter includes a first reset switch and second reset switch, each controlled by a reset signal. The first reset switch is connected in a first reset feedback path between an input and an output of an integ... | 12/20/2011 |
| 8077066 | ΔΣ modulator Disclosed herein is a ΔΣ modulator including: at least one integrator; a quantizer for quantizing a signal output by the integrator and outputting the quantized signal as a digital signal; and a compensation section configured to compensate the ΔΣ modulator for ... | 12/13/2011 |
| 8072362 | Modulator with loop-delay compensation A modulator is constructed with a loop-delay compensation. A delta-sigma modulator generates a quantization code, and a digital compensation filter receives the quantization code and outputs a digital code. The digital compensation filter then feeds the digital code... | 12/06/2011 |
| 8072363 | System and method for bandpass sigma-delta modulation Various embodiments of this disclosure may describe a bandpass sigma-delta modulator (BP ΣΔM) comprising an electromechanical filter, a quantizer coupled to the electromechanical filter, and a feedback circuit coupled between the quantizer and the electromechanica... | 12/06/2011 |
| 8063806 | Apparatus comprising frequency selective circuit and method Various embodiments are disclosed relating to techniques of filtering and down-converting a received signal. In accordance with an example embodiment of the present invention, an analog signal may be received and amplified in a transconductance amplifier. The amplif... | 11/22/2011 |
| 8049651 | ΔΣ modulation circuit and system A ΔΣ modulation circuit that includes a first integrator and second integrator coupled in series, a quantizer coupled to an output of the second integrator, a delay device disposed in a feedback path from an output of the quantizer to an input of the first and sec... | 11/01/2011 |
| 8044836 | Continuous time sigma-delta A/D converter and electrical system comprising the A/D converter A continuous time sigma-delta analog-to-digital converter comprising: a summator of an input analog signal and a feedback signal; a feed-forward integrator path connected to the summator and configured to provide a digital signal; a feedback digital-to-analog conver... | 10/25/2011 |
| 8040265 | Down-converter and up-converter for time-encoded signals The disclosed invention provides apparatus and methods that can convert frequencies of time-encoded signals. In one aspect, a down-converter circuit includes low-pass filters, a switch, a time encoder, and an output low-pass filter. In another aspect, an up-converte... | 10/18/2011 |
| 8040266 | Programmable sigma-delta analog-to-digital converter A system includes an analog-to-digital modulator to convert at least one analog input signal into at least one digital output signal. The system also includes a processing device to set an operational order and a quantization level of the analog-to-digital modulator... | 10/18/2011 |
| 8031095 | Signal conversion using finite impulse response feedback Disclosed are techniques for reducing noise and providing conversion signals in electronic components, including pulse width modulation (PWM) oversampling converters, by performing signal conversion having finite impulse response (FIR) feedback. Implementations may ... | 10/04/2011 |
| 8031096 | High resolution delta-sigma digital-to-analog converter A circuit for a delta-sigma digital-to-analog converter (DAC) includes a first stage with a delta-sigma noise-shaping loop. The first stage is capable of receiving an input signal, includes a first quantizer that has a first quantization error, and provides a first ... | 10/04/2011 |
| 8031094 | Touch controller with improved analog front end A controller for a touch sensor includes a transimpedance amplifier, and a feedback resistor coupled to an input of the transimpedance amplifier and to an output of the transimpedance amplifier. At least one multiplexor may be coupled to the input of the transimpeda... | 10/04/2011 |
| 8018363 | Nonlinear mapping in digital-to-analog and analog-to-digital converters In a high-fidelity digital modulator, a mapper is provided to minimize quantization noise, jitter, and cross-talk between multiple digital-to-analog or analog-to-digital converters. The mapper receives a quantized level from a quantizer and maps the quantized level ... | 09/13/2011 |
| 8018364 | Control apparatus for a load supply device A control apparatus for a supply device of a load, the supply device is of switching type and connected between a supply voltage and a reference voltage, the apparatus including a sigma-delta device having an input terminal at which is present a first digital signal... | 09/13/2011 |
| 8018365 | Continuous-time delta-sigma ADC with compact structure A continuous-time delta-sigma Analog to Digital Converter (ADC) with a compact structure comprises a loop filter, a summing circuit, a quantizer, and a current Digital to Analog Converter (DAC). The loop filter is utilized for receiving and noise-shaping an analog i... | 09/13/2011 |
| 8009072 | Predictive analog-to-digital converter and methods thereof Predictive Analog-to-Digital Converter system in one embodiment includes a sampling section producing a sampled analog input signal with a first summer section combining the sampled analog input signal and an analog prediction signal to produce an analog prediction ... | 08/30/2011 |
| 8004437 | Bandpass delta-sigma modulator A bandpass delta-sigma modulator is formed to include a bandpass filtering circuit that bandpass filters an input signal. An analog-to-digital converter (ADC) receives output of the bandpass filtering circuit and generates an output quantization code. A digital filt... | 08/23/2011 |
| 7999711 | Transmitter digital-to-analog converter with noise shaping A noise-shaping module including a first addition module configured to receive a digital input signal and a filtered output signal. A truncation module is configured to remove selected bits from the digital input signal and output a truncated output signal. The trun... | 08/16/2011 |
| 7999709 | Continuous-time image-reject filter with discrete-time feedback Apparatus are provided for converting a discrete-time analog signal to a continuous-time analog signal. A module comprises a digital-to-analog converter and a filtering arrangement coupled between the digital-to-analog converter and an output node. The digital-to-an... | 08/16/2011 |
| 7999710 | Multistage chopper stabilized delta-sigma ADC with reduced offset A relatively low frequency chopping operation is applied to a delta-sigma ADC to reduce DC offsets resulting from non-ideal component operation. Sequential chopping takes place outside a closed loop and may include an inverted polarity feedback for a part of the cho... | 08/16/2011 |
| 7982646 | Method and apparatus for matched quantum accurate feedback DACs A second order superconductor delta-sigma analog-to-digital modulator having an input for receiving an analog signal, a first integrator coupled to the input, a second integrator cascaded with the first integrator, and a quantum comparator digitizing output from the... | 07/19/2011 |
| 7982647 | Delta-sigma A/D converter An object of the present invention is to provide a highly accurate delta sigma A/D converter. Disclosed is a delta sigma A/D converter including: a first integration circuit to generate a first signal on the basis of an input signal and a first feedback signal from ... | 07/19/2011 |
| 7982648 | Dynamic element matching digital/analog conversion system and sigma-delta modulator using the same A dynamic element matching sigma-delta modulator includes an adder to receive an analog input signal and a feedback signal to generate an error signal; a loop filter to generate a filtered signal according to the error signal; a quantizer to change the filtered sign... | 07/19/2011 |
| 7973689 | Bandpass multi-bit sigma-delta analog to digital conversion Examples of a system and method for sigma-delta analog-to-digital conversion of an electrical input signal are disclosed. A bandpass-filtered signal based on an electrical input signal and an analog feedback signal may be provided. A multi-bit digital representation... | 07/05/2011 |
