A portable NMR platform with arbitrary phase control and temperature compensation

Qing Yang; Jianyu Zhao; Frederik Dreyer; Daniel Krüger; Jens Anders

doi:10.5194/mr-3-77-2022

A portable NMR platform with arbitrary phase control and temperature compensation

Magn Reson (Gott). 2022 May 16;3(1):77-90. doi: 10.5194/mr-3-77-2022. eCollection 2022.

Authors

Qing Yang¹, Jianyu Zhao¹, Frederik Dreyer¹, Daniel Krüger^{1

2}, Jens Anders^{1

3}

Affiliations

¹ Institute of Smart Sensors, University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany.
² John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States.
³ Center for Integrated Quantum Science and Technology (IQST), Stuttgart, Germany.

Abstract

In this paper, we present a custom-designed nuclear magnetic resonance (NMR) platform based on a broadband complementary metal-oxide-semiconductor (CMOS) NMR-on-a-chip transceiver and a synchronous reference signal generator, which features arbitrary phase control of the excitation pulse in combination with phase-coherent detection at a non-zero intermediate frequency (IF). Moreover, the presented direct digital synthesis (DDS)-based frequency generator enables a digital temperature compensation scheme similar to classical field locking without the need for additional hardware. NMR spectroscopy and relaxometry measurements verify the functionality of the proposed frequency reference and temperature compensation scheme as well as the overall state-of-the-art performance of the presented system.