Base line restoration circuit

Details Base line restoration circuit Base line restoration circuit

2011-02-08

2011-02-08

Kim, Robert (Department: 2881)

Radiant energy

Ionic separation or analysis

C250S287000

Reexamination Certificate

active

07884317

ABSTRACT:
Circuits for correcting base line shift of the detector coupling circuit of a TOFMS provide gain and impedance characteristics that compensate for the AC coupling effect of the detector. In one circuit, base line correction is achieved by injecting a current equal to that which flows due to the buildup charge in the detectors AC coupling network. In another circuit, the current source drives an integrator which is coupled to the signal path to reduce the detector AC coupling effects. In another circuit, a low noise amplifier utilizes a feedback network that reduces the detector AC coupling effects. In yet another circuit, an operational amplifier is employed to reduce the detector AC coupling effects.

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