As a new material for nuclear radiation detector in room temperature

CZT has wide application range.So

it’s important to design an effective readout circuit for CZT pixel nuclear radiation detector.CMOS technology is adopted to design a high resolution

low power consumption readout circuit for CZT pixel nuclear radiation detector.This readout circuit consists of charge sensing pre-amplifier

shaping filter network

amplified stage.The operational amplifier adopts PMOS input folded cascade structure and the filtering network uses simple RC—CR structure.The result simulated in the GPDK 0.18 μm CMOS technology show that the sensitivity of this circuit is 0.3 mV/keV

detected energy range is 20

2

00 keV

the power consumption for each channel is 1 mW.