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Jens Anders

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K-band single-chip electron spin resonance detector

Jens Anders

We report on the design, fabrication, and characterization of an integrated detector for electron spin resonance spectroscopy operating at 27 GHz. The microsystem, consisting of an LC-oscillator and a frequency division module, is integrated onto a single ...

2012

Integrated active tracking detector for MRI-guided interventions

Giovanni Boero, Jens Anders, Paul Sangiorgio

We present a fully integrated detector suitable for active tracking of interventional devices in MR-guided interventions. The single-chip microsystem consists of a detection coil, a tuning capacitor, an intermediate frequency downconversion receiver, and a ...

2012

A fully integrated IQ-receiver for NMR microscopy

Giovanni Boero, Jens Anders, Paul Sangiorgio

We present a fully integrated CMOS receiver for micro-magnetic resonance imaging together with a custom-made micro-gradient system. The receiver is designed for an operating frequency of 300 MHz. The chip consists of an on-chip detection coil and tuning ca ...

2011

Fully-integrated CMOS Probes for Magnetic Resonance Applications

Jens Anders

Techniques based on spin resonance effects are amongst the most powerful analytical methods in both modern chemistry and medicine. Recent years have seen a trend toward scaled-down detection coils, exploiting the fact that a reduction of the detector size ...

EPFL2011

An Integrated CMOS Receiver Chip for NMR-Applications

Giovanni Boero, Jens Anders, Paul Sangiorgio

We present the first CMOS-only receiver chip for NMR-applications at 300 MHz. The system consists of an on-chip reception coil, a tuning-capacitor, a downconversion-mixer and a low-frequency gain-stage as well as biasing and offset-compensation circuitry. ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

A single-chip array of NMR receivers

Giovanni Boero, Jens Anders, Paul Sangiorgio

We present the first single-chip array of integrated NMR receivers for parallel spectroscopy and imaging. The array, optimized for operation at 300 MHz, is composed of eight separate channels, with each channel consisting of a detection coil, a tuning capa ...

2009

Mixed-Logic Dynamical System Modeling of Sigma Delta-Modulators and its Application to Stability Analysis

Jens Anders

In this paper, a novel model for single-bit internal quantizer Sigma Delta-modulators is presented. It is shown that this model can be used for an exact stability prediction of these systems. Furthermore, it is explained how the necessary computations can ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

A 2.5 mW 80 dB DR 36 dB SNDR 22 MS/s Logarithmic Pipeline ADC

Jens Anders

A switched-capacitor logarithmic pipeline analog-to-digital converter (ADC) that does not require squaring or any other complex analog function is presented. This approach is attractive where a high dynamic range (DR), but not a high peak SNDR, is required ...

2009

A Low-Noise CMOS Receiver Frontend for NMR-based Surgical Guidance

Giovanni Boero, Jens Anders

In this paper a novel architecture for an integrated NMR receiver front-end for surgical guidance applications is described. While the chip consumes only 9 mA supply current from a 3.3 V power supply it has a measured input referred noise density of 0.7 nV ...

Springer, 233 Spring Street, New York, Ny 10013, United States2009

A Low-Noise CMOS Receiver Frontend for MRI

Giovanni Boero, Jens Anders

In this paper a novel architecture for an integrated receiver front-end for micro magnetic resonance imaging (micro-MRI) applications is described. While the chip consumes only 9mA supply current (4mA in the LNA and 5mA in the output buffer) from a 33V pow ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008