A Wideband CMOS NMR Spectrometer for Multinuclear Molecular Fingerprinting.

We report a wideband (1-100MHz) CMOS spectrometer capable of multinuclear nuclear magnetic resonance (NMR) spectroscopy and demonstrate it by performing 119, and 2H NMR spectroscopy with high spectral resolution down to 0.07 ppm. This is made possible by developing a wideband, digitally assisted CMOS RF transceiver, where a delay-locked loop (DLL) with a broad locking range is the most critical functional block for enabling operation across the full experimental bandwidth. This portable multinuclear NMR system can enhance the capability of online molecular fingerprinting.