CPC H03F 1/30 (2013.01) [G03B 13/36 (2013.01); G05F 3/24 (2013.01); H02P 25/034 (2016.02); H03F 3/45 (2013.01); H03F 2200/453 (2013.01); H03M 1/1009 (2013.01)] | 20 Claims |
1. An apparatus comprising:
a driver configured to, using a drive current, cause adjustment to a position of a lens;
a replica circuit configured to generate a replica current, wherein the replica current corresponds to the drive current;
a comparator configured to produce a comparison signal based on a comparison of the replica current and a threshold current; and
a controller configured to control the drive current based on a state of the comparison signal.
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