A New Method of Fixed Pattern Noise Suppression for CMD Imager

Abstract

This paper describes a new method of FPN suppression that does not use memories on CMD imagers. This method does not require any changes in the conventional device structure. As part of this suppression method, we have employed a new drive method, which we also developed. In this drive method, the pixels are reset sequentially one by one. FPN can be reduced by removing dark signal, which is read out just after resetting, from output signal. We have shown that this method causes no deterioration in terms of photoelectric conversion and image lag, as compared with the conventional method. By this method, We achieved a FPN suppression ratio of 15.8 dB and suppressed FPN to-40.2 dBp-p in comparison with the saturation signal.