In a first embodiment an active pixel sensor includes a photodiode for capturing photocharge, a reset transistor for resetting the photodiode to a reset potential, and a readout transistor, and in a second embodiment an active pixel sensor includes a photodiode for capturing photocharge, a reset transistor...http://www.google.com.au/patents/US6097022?utm_source=gb-gplus-sharePatent US6097022 - Active pixel sensor with bootstrap amplification
