Methods and apparatus for driver calibration

A system, comprising:

• an actuator;
• and
• a control circuit configured to control the actuator and including:
• a current comparator circuit including:
• a first node having a first voltage, and
• a second node having a second voltage,
• a driver including:
• a first terminal responsive to the second voltage, and
• a second terminal connected to a reference voltage, and
• a replica circuit including:
• a third terminal connected to the first node,
• a fourth terminal connected to the second terminal of the driver, and
• a fifth terminal connected to the first terminal of the driver.

An imaging system, comprising:

• a lens;
• an actuator configured to adjust a position of the lens;
• a current comparator circuit including:
• a first node having a first voltage, and
• a second node having a second voltage;
• a driver configured to control the actuator and including:
• a first terminal responsive to the second voltage, and
• a second terminal connected to a reference voltage;
• and
• a replica circuit including:
• a third terminal connected to the first node,
• a fourth terminal connected to the second terminal of the driver, and
• a fifth terminal connected to the first terminal of the driver.