Abstract
Transport of excess carriers in a photo-conductor allows photo-carriers to be sampled remote from their point of generation. In paper I the separation of a photo-conductor into a generation and sampling volume is described in terms of equivalent signal processing associated with the sampling volume. Device geometry for time-delayed integration, multiplexing and edge enhancement are discussed. The Green's function for excess carriers in an infinite solid is used to give a physical description of signal and noise and their modification by transport. Diffusion is identified as a cause of image degradation; noise correlation is shown to limit the processing advantage described. In paper II a more detailed analysis is outlined to include the effects due to finite length and give a discussion of coherent and incoherent sampling.
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