{TAIL ~ The resonant circuit tuning system} also may include a controller for controlling {HEAD ~ a variable value} of at least one of the first and second capacitive elements 
{ TAIL ~ The resonant circuit tuning system } also may include a controller for controlling { HEAD ~ a variable value } of at least one of the first and second capacitive elements
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH