Read out circuit is a critical component needed for infrared and visible light imaging system. Advances in image sensors
and microelectronics have led to the development of digital read out fabricated using deep sub micro integrated circuit
techniques. An brief review is given of the image sensor developing. Major adaptation circuit are review including
source follower, direct injection, and capacitance trans impedance amplifier. On chip analog signal processing and
analog to digital conversion techniques are also discussed. Noise shaping modulation is a promising technique to build a
low power, ultra small area, high precision pixel level AD convertor.
Proc. SPIE. 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments
KEYWORDS: Infrared detectors, Signal to noise ratio, Infrared imaging, Optical amplifiers, Sensors, Field programmable gate arrays, Data acquisition, Infrared radiation, Analog electronics, Signal detection
The implementation of a high resolution infrared image data acquisition system is introduced. An adapter is designed to
provide a working environment needed by the detector and perform the functions of signal level shifting. The analog
image signal is converted to digital data by high precision pipeline ADC. The acquired image data is reordered and then
sent to the host computer via a PCI adapter. The image data reorder function is implemented based on asynchronous
static RAM. The design detail about the noise and dynamic performance of the amplifier was present.