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