Device for processing and digitizing an energy spectrum of an electromagnetic radiation

1. A device for processing and digitizing an energy spectrum of a radiation, comprising:

a charge preamplification circuit of the integrating circuit type, suitable for being connected to a semiconductor detector and delivering a preamplified signal at an output;

a lag line energy measurement circuit connected to the output of the preamplification circuit; and

a sampler connected to the output of the energy measurement circuit,

wherein it further comprises a synchronization circuits comprising:

a current pulse measurement circuit connected to the output of the preamplification circuit and calculating the difference between the output of the preamplification circuit and a differential of the output of the preamplification circuit; and

a discrimination circuit forming a binary logic signal according to the output of the pulse measurement circuit, said logic signal controlling the sampling times of the sampler.

2. The device as claimed in claim 1 , wherein the synchronization circuits further comprises a smoothing circuit for eliminating the pulses of the logic signal, having a duration longer than a predefined threshold duration.

3. The device as claimed in claim 2 , wherein the predefined threshold duration is shorter than or equal to the rise time of the charge preamplification circuit.

4. The device as claimed in claim 1 , wherein the integration time constant of the preamplification circuit is substantially equal to the differentiation time constant of the pulse measurement circuit.

5. The device as claimed in claim 1 , wherein the pulse measurement circuit comprises:

a differentiator stage comprising a high gain amplifier, a capacitance connected to the input of said high gain preamplifier, and a resistance connected between the input and the output of the high gain preamplifier; and

a subtractor stage connected to the outputs of the preamplification circuit and the differentiator stage.