Patent ID: 6374192
Filing Date: 2002-04-16
Classification: G01T

Abstract:
An automatic pole-zero error correction circuit for use in an ionizing radiation spectroscopy system having a preamplifier and a high-pass and low-pass shaping network for generating a shaped pulse, the automatic pole-zero error correction circuit comprising:a) a pole-zero network coupled to the ionizing radiation spectroscopy system along the high-pass shaping network between the preamplifier and low-pass shaping network, b) a gated integrator coupled to the low-pass shaping network for integrating the shaped pulse and a trailing edge of the shaped pulse forming a signal having a slope proportional to the pole-zero error in the ionizing radiation spectroscopy system, c) an analog-to-digital convertor (ADC) coupled to the gated integrator for converting two samples along the slope of the integrated shaped pulse, d) a digital control circuit coupled to the ADC for receiving the two samples converted by the ADC, for comparing the values of the two samples to each other, for generating a control signal in response to the two sample value comparison and for applying the control signal to the pole-zero network, and e) the pole-zero network affecting pole-zero error correction upon the ionizing radiation spectroscopy system in response to receiving the control signals generated and applied by the digital control circuit.