An embodiment of the invention comprises {HEAD ~ a phase modulation detector} comprising {TAIL ~ a pair} of transformers, each transformer having a primary winding respectively connected to one of the transducers—e.g., via a respective input amplifier 
comprising
An embodiment of the invention comprises { HEAD ~ a phase modulation detector } comprising { TAIL ~ a pair } of transformers , each transformer having a primary winding respectively connected to one of the transducers — e.g. , via a respective input amplifier
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH