Work

A Transceiver for NMR Field Probes Integrated in a Low-Power CMOS Process

Year: 2025

Type: conference-paper

Abstract: This paper presents a CMOS transceiver for field monitoring in magnetic resonance imaging (MRI) scanners. The integrated circuit (IC) is optimized for usage in magnetic field strengths of 3T and 7T. The transceiver integrates a transmitter capable of exciting a nuclear magnetic resonance (NMR) field probe up to a peak-to-peak voltage of 143V thanks to a resonant tank. This NMR-on-a-chip also implements a low-IF quadrature receiver. The receiver, including transimpedance amplifiers (TIA) and measurement output buffers, consumes only 14.1mW. The measured signals acquired in a full-body scanner result in an input-referred noise of ${\text{390pV/}}\sqrt {{\text{Hz}}} $ owing to a resonant network passively amplifying the probe signal to the low-noise amplifier (LNA) input. The overall transceiver is integrated into a 65nm CMOS process covering a total area of 1.5mm2.

Source: IEEE International Symposium on Circuits and Systems proceedings

DOI: 10.1109/iscas56072.2025.11043572

Authors: Guillaume Mocquard, Oskar Bjorkqvist, Klaas P. Pruessmann, Thomas Burger

Institutions: ETH Zurich, Integrated Systems Laboratory, University of Zurich, Institute for Biomedical Engineering

Language: English

Topic: Radio Frequency Integrated Circuit Design

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: National Science Foundation

OpenAlex ID: W4411726244

FWCI: 2.325

Cites: 16

Cited by: 1

Related to: 10