Grisi Marco, Gualco Gabriele, Boero Giovanni
Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland.
Rev Sci Instrum. 2015 Apr;86(4):044703. doi: 10.1063/1.4916206.
In this article, we present an integrated broadband complementary metal-oxide semiconductor single-chip transceiver suitable for the realization of multi-nuclear pulsed nuclear magnetic resonance (NMR) probes. The realized single-chip transceiver can be interfaced with on-chip integrated microcoils or external LC resonators operating in the range from 1 MHz to 1 GHz. The dimension of the chip is about 1 mm(2). It consists of a radio-frequency (RF) power amplifier, a low-noise RF preamplifier, a frequency mixer, an audio-frequency amplifier, and fully integrated transmit-receive switches. As specific example, we show its use for multi-nuclear NMR spectroscopy. With an integrated coil of about 150 μm external diameter, a (1)H spin sensitivity of about 1.5 × 10(13) spins/Hz(1/2) is achieved at 7 T.
在本文中，我们展示了一种集成宽带互补金属氧化物半导体单芯片收发器，适用于实现多核脉冲核磁共振（NMR）探头。所实现的单芯片收发器可与片上集成微线圈或工作在1 MHz至1 GHz范围内的外部LC谐振器相连接。芯片尺寸约为1平方毫米。它由一个射频（RF）功率放大器、一个低噪声RF前置放大器、一个混频器、一个音频放大器以及完全集成的收发开关组成。作为具体示例，我们展示了其在多核NMR光谱学中的应用。使用外径约为150μm的集成线圈，在7 T时实现了约1.5×10¹³自旋/Hz¹/²的¹H自旋灵敏度。
