Patent ID: 7850083

Claim:
A method, comprising: receiving, by an electro-optical system, a first analog signal representative of a measured parameter from an electro-optical device of the electro-optical system, wherein the first analog signal is generated by the electro-optical device in response to receipt, by the electro-optical device, of a second analog signal representative of a set parameter; digitizing, by the electro-optical system, the first analog signal to generate a digital feedback value; subtracting, by the electro-optical system, the digital feedback value from a digital set point value to determine a digital error value; determining, by the electro-optical system, a digital cumulative error sum from the digital error value; determining, by the electro-optical system, a digital control value as a function of the cumulative error sum; converting, by the electro-optical system, the digital control value to a third analog signal; and driving, by the electro-optical system, the electro-optical device with the third analog signal, wherein the third analog signal is configured to compensate for the digital error value.