a second switching element coupled to {HEAD ~ the signal processing means} and switching the signal processing means into one of an active state and an inactive state, said {TAIL ~ signal processing means} driven by said smoothed secondary power supply voltage, and 
a second switching element coupled to { HEAD ~ the signal processing means } and switching the signal processing means into one of an active state and an inactive state , said { TAIL ~ signal processing means } driven by said smoothed secondary power supply voltage , and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH