Fig. 8: Signal processing chain for imaging experiment. | Communications Engineering

Fig. 8: Signal processing chain for imaging experiment.

From: An energy-resolving photon-counting X-ray detector for computed tomography combining silicon-photomultiplier arrays and scintillation crystals

Fig. 8

One channel is composed of a preamplifier, shaping amplifier, and discriminator with DAC (digital-to-analog converter) -based threshold control using an FPGA (field programmable gate array) as shown in (a). The converted digital signal is fed to the FPGA based ToT (time over threshold) data acquisition system named as PETnet (positron emission tomography net) to count the number of pulses and record them. b shows the parameters of the preamplifier and shaping amplifier used in the experiment.

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