Patent ID: 8013590

Claim:
A method of measuring signals related to a sensor device, said method comprising: measuring a nominal reset voltage value of said sensor device; asserting a first knee point voltage to a photodiode of said sensor device, wherein said first knee point voltage resets a voltage on said photodiode to said first knee point voltage when the voltage of said photodiode is below said first knee point voltage; measuring an output voltage associated with said photodiode at an end of an integration period; subsequent to said integration period, asserting a second knee point voltage to said photodiode, wherein said second knee point voltage has a value approximately equal to a value of said first knee point voltage; and measuring a voltage value of said photodiode in response to said asserted second knee point voltage; and reporting said nominal reset voltage value, said output voltage, and said voltage value of said photodiode in response to said second knee point voltage.