Publications related to Low-power and low-voltage delta-sigma analog-to-digital converters for digital radio in standard CMOS technology

A 16-channel 220 µW neural recording IC with embedded delta compression

Alexandre Schmid, Yusuf Leblebici, Vahid Majidzadeh Bafar

A 16-channel neural action potential recording IC suitable for large-scale integration with multi-electrode arrays (MEAs) is presented. A closed-loop gain of 60 dB in the action potential band is achieved by cascading differential gain-stages utilizing a n ...

2011

Clock jitter estimation in noise

Ali H. Sayed

Clock timing jitter refers to random perturbations in the sampling time in analog-to-digital converters (ADCs). The perturbations are caused by circuit imperfections in the sampling clock. This paper analyzes the effect of sampling clock jitter on the acqu ...

IEEE2011

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

Reducing spurious PLL tones in spectrum sensing architectures

Ali H. Sayed

In a non-ideal 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 creates spurious tones in the sampled data as well. In spectrum sen ...

IEEE2011

Transmission of 640 Gb/s RZ-OOK Channel over 100 km SSMF by Wavelength-Transparent Conjugation

Camille Sophie Brès

We report the first demonstration of 640-Gb/s return-to-zero ON-OFF keying channel transmission over a 100-km standard single-mode fiber link employing midspan phase conjugation. A frequency-degenerate conjugate field spanning more than 20 nm is created in ...

2011

Performances of Microwave-Band Analog Signal Transmission Using Wafer-Fused Long Wavelength VCSELs

Elyahou Kapon, Grigore Suruceanu, Vladimir Iakovlev

The modulation characteristics of wafer-fused long-wavelength vertical-cavity surface-emitting lasers (VCSELs) for multichannel microwave-band analog signal transmission were investigated within a large-signal behavioral model based on a commercial microwa ...

2011

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

Growth of intersubband GaN/AlGaN heterostructures

Nicolas Grandjean, Antonino Francesco Castiglia, Sylvain Nicolay, Denis Martin

GaN/AlN multiple quantum wells (MQWs), designed for intersubband (ISB) absorption in the telecommunication range, are grown by molecular beam epitaxy. We demonstrate that the use of both AlN template and optimized growth temperature allows to reach ISB tra ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2010

Echo-time independent signal modulations for strongly coupled systems in triple echo localization schemes: An extension of S-PRESS editing

Rolf Gruetter, Giulio Gambarota

The double spin-echo point resolved spectroscopy sequence (PRESS) is a widely used method and standard in clinical MR spectroscopy. Existence of important J-modulations at constant echo times, depending on the temporal delays between the rf-pulses, have be ...

2010

Reduction of the effects of spurious PLL tones on A/D converters

Ali H. Sayed

In a non-ideal 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 creates spurious tones in the sampled data as well. This paper anal ...

IEEE2010

Low-power and low-voltage delta-sigma analog-to-digital converters for digital radio in standard CMOS technology

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A 16-channel 220 µW neural recording IC with embedded delta compression

Clock jitter estimation in noise

Random Sampling ADC for Sparse Spectrum Sensing

Reducing spurious PLL tones in spectrum sensing architectures

Transmission of 640 Gb/s RZ-OOK Channel over 100 km SSMF by Wavelength-Transparent Conjugation

Performances of Microwave-Band Analog Signal Transmission Using Wafer-Fused Long Wavelength VCSELs

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

Growth of intersubband GaN/AlGaN heterostructures

Echo-time independent signal modulations for strongly coupled systems in triple echo localization schemes: An extension of S-PRESS editing

Reduction of the effects of spurious PLL tones on A/D converters

Random Sampling ADC for Sparse Spectrum Sensing

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

Performances of Microwave-Band Analog Signal Transmission Using Wafer-Fused Long Wavelength VCSELs

Clock jitter estimation in noise

Transmission of 640 Gb/s RZ-OOK Channel over 100 km SSMF by Wavelength-Transparent Conjugation

Reducing spurious PLL tones in spectrum sensing architectures

Growth of intersubband GaN/AlGaN heterostructures

A 16-channel 220 µW neural recording IC with embedded delta compression

Echo-time independent signal modulations for strongly coupled systems in triple echo localization schemes: An extension of S-PRESS editing

Reduction of the effects of spurious PLL tones on A/D converters