Accordingly, {TAIL ~ the drive signal} applied to fine displacing element 112 can be controlled to lie within {HEAD ~ a predetermined range} such that good linearity is maintained 
Accordingly , { TAIL ~ the drive signal } applied to fine displacing element 112 can be controlled to lie within { HEAD ~ a predetermined range } such that good linearity is maintained
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH