发明名称 |
LOW-NOISE WIDEBAND PREAMPLIFIER FOR FOURIER TRANSFORM MASS SPECTROMETRY |
摘要 |
An ion cyclotron resonance (ICR) mass spectrometer includes an ICR cell having detection plates generating a detection current signal, detection circuitry generating a digital signal from the detection current signal, and a processor calculating a mass spectrum from the digital signal, wherein the detection circuitry includes a preamplifier having a differential pair of input junction field effect transistors (JFETs) receiving the detection current signal from the ICR cell, a pair of second JFETs in cascode configuration with the input JFETs, and an analog to digital converter generating the digital signal from a differential voltage signal generated by the second JFETs. |
申请公布号 |
WO2008103970(A3) |
申请公布日期 |
2009.06.04 |
申请号 |
WO2008US54815 |
申请日期 |
2008.02.23 |
申请人 |
TRUSTEES OF BOSTON UNIVERSITY;O'CONNOR, PETER, B.;MATHUR, RAMAN |
发明人 |
O'CONNOR, PETER, B.;MATHUR, RAMAN |
分类号 |
H01J49/02;H01J49/38 |
主分类号 |
H01J49/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|