Image sensors are electronic devices with inherent uncertainties, inefficiencies, inaccuracies and mis-chargesall of which can result in unwanted artifacts called noise. While there are numerous noise sources on a sensor, the most significant is dark current noise. The primary sources of dark current noise are impurities in the initial silicon wafer or damage to the silicon crystal lattice. Heat build-up (and all digital cameras produce heat with prolonged use) can also lead to dark noise. One way to reduce dark current noise is Accumulation Mode Clocking, or MultiPinned Phase technology, which uses a voltage variation to move “holes” (positive charges) to the surface of the silicon, attracting roaming electrons and quelling noise generation. This white paper describes MPP technology and its use in digital cameras.