Patent ID: 7391169

Claim:
A system for processing analog voltage for cold-cathode fluorescent lamp, the system comprising: a voltage-to-current converter configured to receive an input analog voltage signal and generate a first current signal; a current processing component configured to receive the first current signal and a predetermined current and generate a second current signal; a current-to-voltage converter configured to receive the second current signal and generate an output analog voltage signal; a dimming controller configured to receive the output analog voltage signal and generate a control signal for driving at least a cold-cathode fluorescent lamp; wherein: the voltage-to-current converter, the current processing component, and the current-to-voltage converter are configured to be biased between a first power supply voltage level and a second power supply voltage level; the input analog voltage ranges from the first power supply voltage level to the second power supply voltage level; the output analog voltage signal ranges from a first output voltage level to a second output voltage level; the output analog voltage signal equals a sum of a first predetermined constant and a product of a second predetermined constant and the input analog voltage signal; the first output voltage level corresponds to the first power supply voltage level based on at least information associated with the first predetermined constant and the second predetermined constant; the second output voltage level corresponds to the second power supply voltage level based on at least information associated with the first predetermined constant and the second predetermined constant.