A low jitter direct digital frequency synthesized frequency shift keyed modulator has a tapped delay line to provide {TAIL ~ polyphase sampling} of {HEAD ~ an asynchronous data input signal} 
A low jitter direct digital frequency synthesized frequency shift keyed modulator has a tapped delay line to provide { TAIL ~ polyphase sampling } of { HEAD ~ an asynchronous data input signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD