System and method for analog voltage processing in wide range for cold-cathode fluorescent lamp

A system for processing analog voltage, the system comprising:

• a voltage-to-current converter configured to receive an input analog voltage signal and generate a first current signal, the voltage-to-current converter including a first transistor, the first transistor including a first source and a first drain and being associated with a first current flowing between the first source and the first drain;
• a first current mirror configured to receive a predetermined current and generate a second current, the second current being proportional to the predetermined current, the first current being equal to a sum of the second current and the first current signal;
• a second current mirror configured to receive the first current and generate a third current, the third current being proportional to the first current;
• a third current mirror configured to receive the predetermined current and generate a fourth current, the fourth current being proportional to the predetermined current;
• a current-to-voltage converter configured to receive the third current and the fourth current and generate an output analog voltage signal.

A system for processing analog voltage, the system comprising:

• a voltage-to-current converter configured to receive an input analog voltage signal and generate a first current signal, the voltage-to-current converter including a first transistor, the first transistor including a first source and a first drain and being associated with a first current flowing between the first source and the first drain;
• a first current mirror configured to receive a predetermined current and generate a second current, the second current being proportional to the predetermined current, the first current being equal to a sum of the second current and the first current signal;
• a second current mirror configured to receive the first current and generate a third current, the third current being proportional to the first current;
• a current-to-voltage converter configured to receive the third current and generate an output analog voltage signal.

A method for processing analog voltage for cold-cathode fluorescent lamp, the method comprising:

• receiving an input analog voltage signal;
• converting the input analog voltage signal into a first current signal;
• receiving the first current signal and a predetermined current;
• processing information associated with the first current signal and the predetermined current;
• generating a second current signal based on at least information associated with the first current signal and the predetermined current;
• receiving the second current signal;
• converting the second current signal to an output analog voltage signal;
• receiving the output analog voltage signal;
• generating a dimming control signal for driving at least a cold-cathode fluorescent lamp;
• wherein:
• the converting the input analog voltage signal into a first current signal, the processing information associated with the first current signal and the predetermined current, and the converting the second current signal to an output analog voltage signal are performed by using 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.

A method for processing analog voltage, the method comprising:

• receiving an input analog voltage signal;
• converting the input analog voltage signal to a first current signal;
• receiving a predetermined current;
• generating a first current based on at least information associated with the predetermined current, the first current being proportional to the predetermined current;
• processing information associated with the first current and the first current signal;
• generating a second current equal to a sum of the first current and the first current signal;
• receiving the second current;
• generating a third current based on at least information associated with the second current, the third current being proportional to the second current;
• generating a fourth current based on at least information associated with the predetermined current, the fourth current being proportional to the predetermined current;
• receiving the third current and the fourth current;
• generating a fifth current equal to a sum of the third current and the fourth current;
• converting the fifth current to an output analog voltage signal.

A method for processing analog voltage, the method comprising:

• receiving an input analog voltage signal;
• converting the input analog voltage signal to a first current signal;
• receiving a predetermined current;
• generating a first current based on at least information associated with the predetermined current, the first current being proportional to the predetermined current;
• processing information associated with the first current and the first current signal;
• generating a second current equal to a sum of the first current and the first current signal;
• receiving the second current;
• generating a third current based on at least information associated with the second current, the third current being proportional to the second current;
• receiving the third current;
• converting the third current to an output analog voltage signal.