Patent ID: 8791709

Claim:
A MEMS actuator circuit, comprising: a current mirror having a first, a second, and a third mirror contacts, wherein a first current flowing through the first mirror contact is mirrored by a second current flowing through the second mirror contact; a voltage divider having an interior contact and coupled between the second mirror contact and a first potential; an operational amplifier having a first amplifier input coupled to the interior contact, a second amplifier input, and an amplifier output; and a switch having a first switch contact coupled to the first mirror contact, a second switch contact coupled to the amplifier output, and a switch control contact, wherein a MEMS capacitor is coupled between the second mirror contact and the first potential, wherein one plate of the MEMS capacitor is a movable plate and the other plate is a fixed plate, wherein the movable plate is coupled to a lens, wherein a change in the location of the movable plate relative to the fixed plate effects a change in the location of the lens, and wherein the lens has capability of projecting an image onto an image sensing device.