Quantum mechanics

Phase (matter)

Engineering

Psychoanalysis

Materials science

Nuclear magnetic resonance

Power (physics)

Computer science

Frequency synthesizer

Radiology

Phase noise

Physics

Direct digital synthesizer

Psychology

Electronic engineering

Relaxometry

Transceiver

Generator (circuit theory)

Medicine

Compensation (psychology)

CMOS

Optoelectronics

Magnetic resonance imaging

Phase-locked loop

Spin echo

Magnetic Resonance

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.

A portable NMR platform with arbitrary phase control and temperature compensation