Transresistance amplifier for a charged particle detector

Details Transresistance amplifier for a charged particle detector Transresistance amplifier for a charged particle detector

2003-05-15

2008-01-08

Wells, Nikita (Department: 2881)

Amplifiers

Having light-controlled or activated device

C330S06100R

Reexamination Certificate

active

07317350

ABSTRACT:
Disclosed is a transresistance amplifier for a charged particle detector, comprising a variable input resistance, which may be a phototransistor (IC3), a voltage amplification stage (IC1) and control means (IC3), operable to vary the variable input resistance. The variable input resistance includes a first light-dependent resistance and the control means includes a first variable intensity light source that is optically coupled to the first light-dependent resistance. Also disclosed is a charged particle detector that includes such a transresistance amplifier and an electron microscope that includes such a charged particle detector.

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