Front-end electronic circuitry for a photon counting application

A front-end electronic circuitry for a photon counting application, comprising:

• an output node to provide an output signal,
• an input node to receive a input signal,
• a charge sensitive amplifier comprising an amplifier circuit having an input side being coupled to the input node and an output side to provide a charge sensitive amplifier output signal, and a capacitor being arranged in a feedback path between the input side and the output side of the amplifier circuit,
• a controllable switch being arranged in parallel to the capacitor,
• a delay circuit to provide a delay circuit output signal, the delay circuit output signal being a time-delayed representation of the charge sensitive amplifier output signal,
• an output signal generation circuit being coupled to the output node to provide the output signal,
• wherein the output signal generation circuit is configured to generate the output signal by subtracting the delay circuit output signal from the charge sensitive amplifier output signal.