M. Nazrul Islam, T. Fujiwara, S. Kenji, H. Takahashi, Kh. Kh. Asaduzzaman, Md. Shahzamal, Md.N. Haque Mia, M.S. Alam, Mahmudul Hasan and Mahbubul Hoq
Page: 33-35 | Received 21 Sep 2022, Published online: 21 Sep 2022
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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 Cin = ACf, where A is the open-loop gain of the op-amp. If the op-amp gain is high enough that Ci<<Cin, the external capacitance can be neglected. The charge Q is stored onto the feedback capacitor Cf, 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.
M. Nazrul Islam, T. Fujiwara, S. Kenji, H. Takahashi, Kh. Kh. Asaduzzaman, Md. Shahzamal, Md.N. Haque Mia, M.S. Alam, Mahmudul Hasan and Mahbubul Hoq. Design and Development of a Charge-Sensitive Preamplifier for Nuclear Pulse
Processing.
DOI: https://doi.org/10.36478/ijssceapp.2014.33.35
URL: https://www.makhillpublications.co/view-article/1997-5422/ijssceapp.2014.33.35