Patent ID: 9606547
Date: 2017-03-28
CPC Classifications: G05D,H02P

Claim:
1. An apparatus for controlling an actuator in a camera module, the apparatus comprising: a position controller configured to produce a control voltage to move a lens of the camera module; a hall sensor configured to detect an amount of change in magnetic lines of force generated by a magnet to output a hall voltage; a voice coil motor configured to move the lens according to a current applied thereto; and a current controller comprising at least one operational amplifier (OP Amp) and a current booster, the current controller being configured to: wherein the at least one OP Amp is input with the hall voltage in a first terminal and input with the interference voltage in a second terminal to generate the interference-eliminated hall voltage, and wherein the current booster applies the current to the voice coil motor, based on the moving voltage.