Patent ID: 7858946

Claim:
An energy dispersive X-ray detector appliance comprising: a silicon drift detector with internal field effect transistor I-FET SDD, a compensation circuit for compensating nonlinearities in the I-FET SDD, and a neutralizing circuit adapted to neutralize accumulated charges in said the I-FET SDD comprising means for pulsed reset of the detector appliance, wherein said compensation circuit comprises a first feedback loop which is a charge sensitive amplifier circuit, wherein the current amplifier circuit comprises an inverting amplifier, a feedback loop and a feedback capacitance and wherein an input of the inverting amplifier is connected to an output terminal of the FET of the I-FET SDD, a gate of the FET being connected to the feedback capacitor being connected to the feedback loop, the output of said amplifier output and said feedback loop being connected to the input of the neutralizing circuit.