Method and system for yield enhancement

A method for calibrating a circuit performance, comprising:

• assigning a level to at least one circuit parameter of a circuit;
• measuring a value of the at least one circuit parameter during operation of the circuit;
• generating a control signal that corresponds to the value of the at least one measured circuit parameter weighted according to the assigned level;
• and
• adjusting a feedback relationship of a feedback loop of the circuit in a close loop feedback system according to the control signal so as to change the circuit performance.

A system for calibrating a circuit performance, comprising:

• a circuit that is configured to have an adjustable parameter that adjusts the circuit performance;
• a feedback loop circuit that is configured to have a feedback relationship of an adjustment of the adjustable parameter and a measured circuit parameter;
• and
• a yield enhancement unit that is configured to assign a level to at least one circuit parameter, measure a value of the at least one circuit parameter during operation of the circuit, generate a control signal that corresponds to the measured at least one circuit parameter weighted according to the assigned level, and adjust the feedback relationship according to the control signal to change the circuit performance.

An IC chip having an on-chip system for calibrating a circuit performance, comprising:

• a circuit that is configured to have an adjustable parameter that adjusts the circuit performance;
• a feedback loop circuit that is configured to have a feedback relationship of an adjustment of the adjustable parameter and a measured circuit parameter;
• and
• a yield enhancement unit that is configured to assign a level to at least one circuit parameter, measure a value of the at least one circuit parameter during operation of the circuit, generate a control signal that corresponds to the measured at least one circuit parameter weighted according to the assigned level, and adjust the feedback relationship according to the control signal to change the circuit performance.