WAVEFORM GENERATOR ELECTRONICS BASED ON TUNED LC CIRCUITS

摘要

Disclosed is an apparatus for generating a periodically varying electrical signal for creating a periodically varying electrical field between electrod es of an ion mobility spectrometer. The apparatus includes an output port. A first tuned circuit is provided for being electrically coupled to an externa l power source and for, in isolation, providing a first periodically varying electrical signal having a first frequency. The first tuned circuit is coupl ed to the output port for providing an output electrical signal having a component at the first frequency thereto. A second tuned circuit is provided for being electrically coupled to an external power source and for providing a second periodically varying electrical signal having a second frequency different from the first frequency. The second tuned circuit is coupled to t he first tuned circuit for varying the output electrical signal about the first periodically varying electrical signal.