Publications related to Design and Exploration of Low-Power Analog to Information Conversion Based on Compressed Sensing

IcyHeart: Highly integrated ultra-low-power SoC solution for unobtrusive and energy efficient wireless cardiac monitoring

The objective of the IcyHeart project is to investigate and demonstrate a highly integrated and power-efficient microelectronic solution for remote monitoring of a subject’s electrocardiogram (ECG) signals. A complete System-on-a-Chip (SoC) is being develo ...

IEEE Press2012

A Background Calibration Method for DAC Mismatch Correction in Multibit Sigma-Delta Modulators

Pierre-André Farine, Steve Tanner, Shafqat Ali

A topology for the calibration of DAC errors in multi-bit sigma delta modulators is presented. The proposed technique enables the calibration to proceed in the background. In this technique, two DACs are used in a time-interleaved fashion. One DAC is calib ...

2012

Random Sampling ADC for Sparse Spectrum Sensing

Andreas Peter Burg

Scanning large bandwidths (spectrum sensing) pushes today’s analog hardware to its limits since periodic sampling at Nyquist rate with sufficient resolution is often prohibitively complex. In this paper, we consider a scenario where the signal to be acquir ...

2011

Digital Suppression of Spurious PLL Tones in A/D Converters

Ali H. Sayed

In a nonideal PLL circuit, leakage of the reference signal into the control line produces spurious tones. When the distorted PLL signal is used in an analog-to-digital converter (ADC), it injects the spurious tones into the sampled data. These distortions ...

IEEE2011

Subthreshold Current-Mode Delta-Sigma Quantizer with 3-Decade Scalable Sampling Rate and pico-Ampere Range Resolution

Seyed Armin Tajalli, Yusuf Leblebici

A current-mode

\Delta\Sigma

analog-to-digital data converter (ADC) for biomedical readout front-end systems is being presented. The core of this circuit is a current-controlled ring oscillator (CCO) whose oscillation frequency is proportional to the inpu ...

2010

Real-time GNSS software receivers Challenges, status and perspectives

Pierre-André Farine, Cyril Botteron, Marcel Baracchi Frei

The idea of a software receiver is to replace the data processing implemented in hardware with software and to sample the analog input signal as close to the antenna as possible. Thus, the hardware is reduced to the minimum (antenna and analog to digital c ...

2010

Nanowatt Range Folding-Interpolating ADC Using Subthreshold Source-Coupled Circuits

Seyed Armin Tajalli, Yusuf Leblebici

A very low power mixed-signal design methodology based on subthreshold source-coupled circuits is presented, and a nano-Watt range analog-to-digital converter (ADC) circuit based on folding-interpolating topology is proposed as a complete design example. T ...

2010

Parallel architecture for high-speed analog-to-digital conversion

Guillaume Ding

Nowadays digital signal processing systems used for radar applications, communication systems or RF measurement equipments, require very high sample-rates. Sometimes these sample-rates are beyond the possibilities offered by conventional ADCs. To overcome ...

EPFL2009

Model-Based Compressive Sensing for Signal Ensembles

Volkan Cevher

Compressive sensing (CS) is an alternative to Shannon/Nyquist sampling for acquiring sparse or compressible signals. Instead of taking N periodic samples, we measure M < N inner products with random vectors and then recover the signal via a sparsity-seeki ...

2009

Digital Compensation of Cross-Modulation Distortion in Software-Defined Radios

Ali H. Sayed

The wideband RF receiver in a software-defined radio (SDR) system suffers from the nonlinear effects caused by the front-end analog processing. In the presence of strong blocker (interference) signals, such nonlinearities introduce severe cross modulation ...

2009

Design and Exploration of Low-Power Analog to Information Conversion Based on Compressed Sensing

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IcyHeart: Highly integrated ultra-low-power SoC solution for unobtrusive and energy efficient wireless cardiac monitoring

A Background Calibration Method for DAC Mismatch Correction in Multibit Sigma-Delta Modulators

Random Sampling ADC for Sparse Spectrum Sensing

Digital Suppression of Spurious PLL Tones in A/D Converters

Subthreshold Current-Mode Delta-Sigma Quantizer with 3-Decade Scalable Sampling Rate and pico-Ampere Range Resolution

Real-time GNSS software receivers Challenges, status and perspectives

Nanowatt Range Folding-Interpolating ADC Using Subthreshold Source-Coupled Circuits

Parallel architecture for high-speed analog-to-digital conversion

Model-Based Compressive Sensing for Signal Ensembles

Digital Compensation of Cross-Modulation Distortion in Software-Defined Radios

Random Sampling ADC for Sparse Spectrum Sensing

Real-time GNSS software receivers Challenges, status and perspectives

IcyHeart: Highly integrated ultra-low-power SoC solution for unobtrusive and energy efficient wireless cardiac monitoring

Nanowatt Range Folding-Interpolating ADC Using Subthreshold Source-Coupled Circuits

A Background Calibration Method for DAC Mismatch Correction in Multibit Sigma-Delta Modulators

Parallel architecture for high-speed analog-to-digital conversion

Digital Compensation of Cross-Modulation Distortion in Software-Defined Radios

Digital Suppression of Spurious PLL Tones in A/D Converters

Subthreshold Current-Mode Delta-Sigma Quantizer with 3-Decade Scalable Sampling Rate and pico-Ampere Range Resolution

Model-Based Compressive Sensing for Signal Ensembles