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Palm size chip NMR probe

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Palm size chip NMR.jpg

Introduction

Nuclear magnetic resonance (NMR) is the method of choice for high accuracy and high resolution measurements of high magnetic fields (i.e., larger than 0.1 T).High field NMR magnetometers are commonly used to measure the magnetic field value, spatial homogeneity, and temporal evolution in magnets for magnetic resonance imaging (MRI), for physics experiments, and for calibration of sensors based on other physical principles.

Commercial NMR magnetometers generally consist of a main electronic unit and a set of probes capable of variable frequency operation. In the design of NMR probes, the search for discrete electronic components with no or as little as possible ferromagnetic parts in their package is a practical problem to which manufacturers have to dedicate considerable attention. Additionally, the overall size of the assembly of the discrete components is a limiting factor for compact probes to be used in small spaces or when arrays of probes are required.

The use of CMOS transceivers to implement NMR probes for high field magnetometry is trade-off free in terms of performance, and it offers technology-related practical advantages. One practical advantage is the reduced size of the overall electronics needed and the consequent replacement of numerous components in proximity of the probe head. Due to the small size of the single-chip integrated transceiver and to its low power consumption, the introduced field and temperature-related distortions are reduced and thus expected to be advantageous also for eventual high accuracy measurements. A second advantage concerns the costs in the long term, reduced by both materials costs and man power needed to implement each probe. Finally, the use of single-chip transceivers is certainly expected to ease the implementation of arrays of probes.

Project Description

The goal of this project is first to learn the basic knowledge and complete the design of blocks in NMR probe such as radio-frequency (RF) transmit amplifier, low noise RF receive amplifier and intermediate frequency amplifier, and finally complete the system level design of palm size chip NMR probe.

Status: Available

Semester or master project by 1 or 2 master students
Contact: Prof. Taekwang Jang <tjang@ethz.ch>

Prerequisites

  • Analog circuit design
  • RF circuit design

Character

  • 20% Theory
  • 30% Simulation
  • 50% Circuit design

Professor

Taekwang Jang

Reference

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