Patent ID: 8878816

Claim:
A sensor element, comprising: an amplifier having a first amplifier end, a second amplifier end and a control end, the first amplifier end connected to a first voltage source, the second amplifier end operatively connected to a voltage output for providing an output voltage, wherein the second amplifier end is configured for connection to a current source; and a photosensing element having a first element end operatively connected to the first voltage source, and a second element end operatively connected to the control end of the amplifier, wherein the voltage output is operatively connected to a resetting element, the resetting element connected to a reset voltage source providing a predetermined reset voltage for resetting the output voltage at the second amplifier end to the predetermined reset voltage, wherein the amplifier is operable in a first period and a second period, and the first voltage source comprises a first voltage level in the first period and a different second voltage level in the second period.