{TAIL ~ An embodiment} of the invention comprises {HEAD ~ 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 
{ TAIL ~ An embodiment } of the invention comprises { HEAD ~ 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
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