Power generator for spectrometry

Details Power generator for spectrometry Power generator for spectrometry

2007-05-09

2010-12-14

Evans, F. L (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

C315S111510

Reexamination Certificate

active

07852471

ABSTRACT:
An RF power generator (10) for an induction coil (26) for exciting an inductively coupled plasma in a torch (27) for spectrometry. The generator (10) comprises a switching circuit (12) for alternately switching ON and OFF solid state switching devices (20) via gate drive voltages (22) for supplying RF power into a resonant load circuit (16) comprising the induction coil (26) and parallel connected capacitance (25). The gate drive circuits (24) for each solid state switching device (20) each include a portion (30) that is mutually inductively coupled with leads of the induction coil (26) to provide the gate drive voltages (22). The circuit allows for reduced componentry and therefore a relatively inexpensive RF power generator for exciting and sustaining an inductively coupled plasma for spectrometry.

REFERENCES:
patent: 3939422 (1976-02-01), Deise
patent: 6175198 (2001-01-01), Nerone
patent: 2006/0017388 (2006-01-01), Stevenson
patent: 1505250 (2004-06-01), None

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