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.
|Number of pages||3|
|Journal||International Journal of Systems Signal Control and Engineering Application|
|Publication status||Published - 2014|
- preamplifier and charge-sensitive preamplifier
- Preamplifier and charge-sensitive preamplifier