Design and development of a charge-sensitive preamplifier for nuclear pulse processing

M. Nazrul Islam*, T. Fujiwara, S. Kenji, H. Takahashi, Kh. Asaduzzaman, Md. Shahzamal, Md. N. Haque Mia, M. S. Alam, Mahmudul Hasan, Mahbubul Hoq

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Researchers attempt to describe a charge-sensitive preamplifier for fast pulse processing. The charge sensitive preamplifier uses a capacitor in place of the feedback resistor. The input capacitance of this circuit is Cm = ACf where A is the open-loop gain of the op-amp. If the op-amp gain is high enough that C << Cin, the external capacitance can be neglected. The charge Q is stored onto the feedback capacitor f, producing an output pulse of height V = -Q/Cf independent of the detector and stray capacitances. Since, there is a high voltage on the detector electrode, the amplifier input is connected to the cathode of the GM detector through a ground full-up resistor.

Original languageEnglish
Pages (from-to)33-35
Number of pages3
JournalInternational Journal of Systems Signal Control and Engineering Application
Issue number2
Publication statusPublished - 2014
Externally publishedYes


  • Radiation
  • detector
  • op-amp
  • preamplifier and charge-sensitive preamplifier
  • resistor
  • Detector
  • Op-amp
  • Preamplifier and charge-sensitive preamplifier
  • Resistor


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