Most preferably {TAIL ~ the filter tuning circuit} and {HEAD ~ the oscillator tuning circuit} are formed on a single Integrated circuit 
Most preferably { TAIL ~ the filter tuning circuit } and { HEAD ~ the oscillator tuning circuit } are formed on a single Integrated circuit
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH