Patent ID: 6347288
Filing Date: 2002-02-12
Classification: H03H

Abstract:
An automatic pole-zero adjustment circuit for an ionizing radiation spectroscopy system, said automatic pole-zero adjustment circuit comprising:a detector unit including a radiation detector in electrical communication with a preamplifier responsive to random analog pulses, said preamplifier producing a preamplifier output having a characteristic time constant; a high pass filter in electrical communication with said preamplifier, said high pass filter producing a filtered signal; a time constant identifier in electrical communication with said detector unit, said time constant identifier producing an identified time constant based upon said characteristic time constant; a correction generator in electrical communication with said time constant identifier, said correction generator generating a correction calculated to compensate for undershoot in said preamplifier output, said correction derived from said identified time constant; and a pole-zero adjustment network in electrical communication with said correction generator, said pole-zero adjustment network applying said correction such that said filtered signal is pole-zero canceled.