%0 Conference Paper %1 9181025 %A Bürkle, Heiko %A Schmid, Kevin %A Klotz, Tobias %A Krapf, Reiner %A Anders, Jens %B 2020 IEEE International Symposium on Circuits and Systems (ISCAS) %D 2020 %K myown %P 1-5 %R 10.1109/ISCAS45731.2020.9181025 %T A High Voltage CMOS Transceiver for Low-Field NMR with a Maximum Output Current of 1.4 A<inf>pp</inf> %X In this paper, we present a fully integrated transceiver ASIC for low field NMR spectroscopy. The chip integrates a conventional low intermediate frequency (low-IF) receiver together with a high-voltage (HV) H-bridge power amplifier (PA) and a PLL frequency synthesizer. The receiver consists of a low noise amplifier (LNA), a quadrature down-conversion mixer and a baseband amplifier. It achieves a measured input-referred voltage noise density of 1.1 nV/√Hz;. The integrated PLL frequency synthesizer supports operating frequencies between 4 MHz and 100 MHz, covering all relevant Larmor frequencies of benchtop and portable NMR. The on-chip PA can drive up to 1.4 A_pp into a 1Ω resistor and 1.6 A_pp into a 3mm, parallel-tuned NMR coil. When operating with a 3mm NMR coil inside a 1.45T unshimmed NMR magnet, the system achieves a spin sensitivity of 9.2 × 10¹⁵ spins/√Hz and a concentration sensitivity of 1.79 mM/√Hz.

@inproceedings{9181025, abstract = {In this paper, we present a fully integrated transceiver ASIC for low field NMR spectroscopy. The chip integrates a conventional low intermediate frequency (low-IF) receiver together with a high-voltage (HV) H-bridge power amplifier (PA) and a PLL frequency synthesizer. The receiver consists of a low noise amplifier (LNA), a quadrature down-conversion mixer and a baseband amplifier. It achieves a measured input-referred voltage noise density of 1.1 nV/√Hz;. The integrated PLL frequency synthesizer supports operating frequencies between 4 MHz and 100 MHz, covering all relevant Larmor frequencies of benchtop and portable NMR. The on-chip PA can drive up to 1.4 A_pp into a 1Ω resistor and 1.6 A_pp into a 3mm, parallel-tuned NMR coil. When operating with a 3mm NMR coil inside a 1.45T unshimmed NMR magnet, the system achieves a spin sensitivity of 9.2 × 10¹⁵ spins/√Hz and a concentration sensitivity of 1.79 mM/√Hz.}, added-at = {2021-11-05T13:57:29.000+0100}, author = {Bürkle, Heiko and Schmid, Kevin and Klotz, Tobias and Krapf, Reiner and Anders, Jens}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2895c55ef54da15600e5c0d1800ac9e6e/jens.anders}, booktitle = {2020 IEEE International Symposium on Circuits and Systems (ISCAS)}, doi = {10.1109/ISCAS45731.2020.9181025}, interhash = {872ac56c205e2771a52752f7789153b8}, intrahash = {895c55ef54da15600e5c0d1800ac9e6e}, issn = {2158-1525}, keywords = {myown}, month = oct, pages = {1-5}, timestamp = {2021-11-05T12:57:29.000+0100}, title = {A High Voltage CMOS Transceiver for Low-Field NMR with a Maximum Output Current of 1.4 A<inf>pp</inf>}, year = 2020 }