Method and apparatus for analog pulse pile-up rejection
AssigneeBrookhaven Science Associates, LLC
InventorGianluigi De Geronimo
Life of this patent
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Abstract
A method and apparatus for pulse pile-up rejection are disclosed. The apparatus comprises a delay value application constituent configured to receive a threshold-crossing time value, and provide an adjustable value according to a delay value and the threshold-crossing time value; and a comparison constituent configured to receive a peak-occurrence time value and the adjustable value, compare the peak-occurrence time value with the adjustable value, indicate pulse acceptance if the peak-occurrence time value is less than or equal to the adjustable value, and indicate pulse rejection if the peak-occurrence time value is greater than the adjustable value.
Claims11
A circuit for pulse pile-up rejection, comprising:
- a sensor configured to output a signal;
- a charge amplifier configured to receive the signal, amplify the signal and output the amplified signal;
- a filter configured to receive the amplified signal, filter the amplified signal, and output the filtered signal;
- a discriminator configured to receive a threshold, receive the filtered signal, and output a threshold-crossing time value if the filtered signal exceeds the threshold;
- a time-to-amplitude converter configured to receive the threshold-crossing time value, receive a trim value, and output an adjustable value, wherein the adjustable value is provided according to a delay value and the threshold-crossing time value, and the delay value is provided according to the trim value;
- comparison logic configured to receive a peak-occurrence time value of the filtered signal, receive the adjustable value, compare the peak-occurrence time value with the adjustable value, and output a reset signal if the peak-occurrence time value is greater than the adjustable value;
- and
- a peak detector configured to receive the filtered signal, measure a pulse amplitude of the filtered signal, determine the peak-occurrence time value of the filtered signal, output the peak-occurrence time value of the filtered signal, output the pulse amplitude if no reset signal is received, and perform pulse rejection if a reset signal is received.
Dependencies are inferred from the claim text.