Department of Chemistry, University of Wisconsin─Madison, 1101 University Ave, Madison, Wisconsin 53706, United States.
J Am Soc Mass Spectrom. 2021 Dec 1;32(12):2821-2826. doi: 10.1021/jasms.1c00247. Epub 2021 Nov 3.
In this work, we present the Wisconsin Oscillator, a small, inexpensive, low-power circuit for powering ion-guiding devices such as multipole ion guides, ion funnels, active ion-mobility devices, and non-mass-selective ion traps. The circuit can be constructed for under $30 and produces two antiphase RF waveforms of up to 250 V in the high kilohertz to low megahertz range while drawing less than 1 W of power. The output amplitude is determined by a 0-6.5 VDC drive voltage, and voltage amplification is achieved using a resonant LC circuit, negating the need for a large RF transformer. The Wisconsin Oscillator automatically oscillates with maximum amplitude at the resonant frequency defined by the onboard capacitors, inductors, and the capacitive load of the ion-guiding device. We show that our circuit can replace larger and more expensive RF power supplies without degradation of the ion signal and expect this circuit to be of use in miniature and portable mass spectrometers as well as in home-built systems utilizing ion-guiding devices.
在这项工作中，我们提出了威斯康星州振荡器，这是一种小型、廉价、低功耗的电路，用于为多极离子阱、离子漏斗、主动离子迁移率器件和非质量选择离子阱等离子引导器件供电。该电路的成本可以控制在 30 美元以下，可产生高达 250 V 的两个反相射频波形，工作频率在高千赫兹到低兆赫兹范围内，功率消耗小于 1 W。输出幅度由 0-6.5 VDC 驱动电压决定，通过谐振 LC 电路实现电压放大，无需使用大型射频变压器。威斯康星州振荡器可自动在由板载电容器、电感器和离子引导器件的电容负载定义的谐振频率下以最大幅度振荡。我们表明，我们的电路可以替代更大和更昂贵的射频电源，而不会降低离子信号，并且预计该电路将在微型和便携式质谱仪以及利用离子引导器件的自制系统中得到应用。
