Study Of High Frequency Readout IC For Short-wave Irfpa And Real-time Image Processing SoC

High-frequency analog chain of512×256staring short wavelength(SW) inferred detectorreadout-integrated circuit(ROIC), focusing on coupling of weak signal, high-frame output and noisedepression is implemented in this paper. The complete analog signal chain contains a novel inputstage of capacitor feedback transimpedance amplifier(CTIA) preamplifier, a CDS (correlateddouble sampling) module，an amplifier of charge and complementary output stage. An input stageof the readout integrated circuit(ROIC), outputting weak signal of short wavelength(SW) inferredfocal plane arrays(IRFPAs), is optimized in this paper. A novel input stage is implemented by acapacitor feedback transimpedance amplifier（CTIA） of cascode stage with current-source load.The novel CTIA not only functions as common CTIA, but also overcomes the defects such as largearea and high power dissipation. The simulation and verification is accomplished both before andafter completing the layout. The circuit structure is analyzed according to CMOS low-temperaturemodel. The novel CTIA ROIC chip fabricated with CSMC-6S05DPTM0.5μm process technologywas measured and proved to be consistent as design and simulation with output signal voltage rangeof2.3v, circuit unit power is less than1.0μW.The simulation and verification is carried out bothbefore and after completing the layout. The circuit’s analog chain structure is analyzed according tolow-temperature model. The result shows that the output dynamic range is over2.3V and the framerate is above250Hz with output of8channels.This paper presents a real-time processing system designed for infrared FPA. The real-timeprocessing is a key technology in the infrared image processing system.In this paper, thepre-processing and segmentation approaches are combined in order to achieve a good result frominfrared images which have large noise, complex background and ambiguous target. This design is areal-time IR image processing system based on Xilinx’s VIRTEX-5, fully using of VIRTEX-5FPGA’s high performing, the FPGA embedded Xilinx’s MicroBlaze processor core, andhigh-performance pre-processing function modules.