This paper presents a single-chip high-voltage transceiver ASIC for low-field NMR spectroscopy. The chip integrates an adjustable high-voltage (HV) H-bridge power amplifier (PA) with a PLL frequency synthesizer and a quadrature low intermediate frequency (low-IF) receiver, achieving a measured input-referred voltage noise density of 1.1 nV / ✓Hz. The operating frequency of the chip is from 0.1 MHz to 200 MHz, supporting all relevant Larmor frequencies for low-field mobile and portable NMR. The PA consists of four isolated 50 V NMOS transistors, isolated gate drivers with a digitally adjustable deadtime control, high-frequency level shifters, and a TX-control logic that supports bootstrapping of the integrated high-side drivers. The output current can be defined by an adjustable voltage supply from 0 V to 50 V, delivering a maximum current of 2.0 App into a non-tuned 3 mm NMR coil and up to 8.3 App into a parallel tuned NMR coil. Inside a custom-designed 1.1 T portable NMR magnet, the system achieves a spin sensitivity of 1.1 × 10<sup>16</sup>spins/ ✓Hz and a concentration sensitivity of 1mM/✓Hz.
%0 Conference Paper
%1 9567823
%A Bürkle, Heiko
%A Klotz, Tobias
%A Krapf, Reiner
%A Anders, Jens
%B ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference (ESSCIRC)
%D 2021
%K myown
%P 327-330
%R 10.1109/ESSCIRC53450.2021.9567823
%T A 0.1 MHz to 200 MHz high-voltage CMOS transceiver for portable NMR systems with a maximum output current of 2.0 A<inf>pp</inf>
%X This paper presents a single-chip high-voltage transceiver ASIC for low-field NMR spectroscopy. The chip integrates an adjustable high-voltage (HV) H-bridge power amplifier (PA) with a PLL frequency synthesizer and a quadrature low intermediate frequency (low-IF) receiver, achieving a measured input-referred voltage noise density of 1.1 nV / ✓Hz. The operating frequency of the chip is from 0.1 MHz to 200 MHz, supporting all relevant Larmor frequencies for low-field mobile and portable NMR. The PA consists of four isolated 50 V NMOS transistors, isolated gate drivers with a digitally adjustable deadtime control, high-frequency level shifters, and a TX-control logic that supports bootstrapping of the integrated high-side drivers. The output current can be defined by an adjustable voltage supply from 0 V to 50 V, delivering a maximum current of 2.0 App into a non-tuned 3 mm NMR coil and up to 8.3 App into a parallel tuned NMR coil. Inside a custom-designed 1.1 T portable NMR magnet, the system achieves a spin sensitivity of 1.1 × 10<sup>16</sup>spins/ ✓Hz and a concentration sensitivity of 1mM/✓Hz.
@inproceedings{9567823,
abstract = {This paper presents a single-chip high-voltage transceiver ASIC for low-field NMR spectroscopy. The chip integrates an adjustable high-voltage (HV) H-bridge power amplifier (PA) with a PLL frequency synthesizer and a quadrature low intermediate frequency (low-IF) receiver, achieving a measured input-referred voltage noise density of 1.1 nV / ✓Hz. The operating frequency of the chip is from 0.1 MHz to 200 MHz, supporting all relevant Larmor frequencies for low-field mobile and portable NMR. The PA consists of four isolated 50 V NMOS transistors, isolated gate drivers with a digitally adjustable deadtime control, high-frequency level shifters, and a TX-control logic that supports bootstrapping of the integrated high-side drivers. The output current can be defined by an adjustable voltage supply from 0 V to 50 V, delivering a maximum current of 2.0 App into a non-tuned 3 mm NMR coil and up to 8.3 App into a parallel tuned NMR coil. Inside a custom-designed 1.1 T portable NMR magnet, the system achieves a spin sensitivity of 1.1 × 10<sup>16</sup>spins/ ✓Hz and a concentration sensitivity of 1mM/✓Hz.},
added-at = {2021-11-03T15:31:46.000+0100},
author = {Bürkle, Heiko and Klotz, Tobias and Krapf, Reiner and Anders, Jens},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/26d7da38e5bc715ac14052defcec6cf62/jens.anders},
booktitle = {ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference (ESSCIRC)},
doi = {10.1109/ESSCIRC53450.2021.9567823},
interhash = {3033c66d590e65ac3272875cd325e510},
intrahash = {6d7da38e5bc715ac14052defcec6cf62},
keywords = {myown},
month = {Sep.},
pages = {327-330},
timestamp = {2021-11-03T14:31:46.000+0100},
title = {A 0.1 MHz to 200 MHz high-voltage CMOS transceiver for portable NMR systems with a maximum output current of 2.0 A<inf>pp</inf>},
year = 2021
}
