Analysis of low signal level characteristics for high-sensitivity CCD charge detector

Low signal level characteristics for a highly sensitive floating surface amplifier (FSA) have been analyzed using a two-dimensional device simulator. The linearity, within 5% variance of charge/voltage conversion ratio from 0.5 to 4000 signal electrons, has been confirmed with this simulation. This result shows that it is possible to make the charge/voltage conversion ratio under 10 signal electrons linear for an actual amplifier. Furthermore, it is shown to be possible to improve the charge/voltage conversion ratio by a factor of 2 over that of the fabricated device.<
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