Recent Developments in Synchronization and Tracking with Synchronous Oscillators

The 9ynchronous Osc i l l a to r (SO) i s a network that e x h i b i t s maw C h a r a c t e r i s t i c s u s e f u l i n communica t ions and s igna l p rocess ing systems. A p r i m a r y f e a t u r e o f t h e SO is synchron iza t ion and t r a c k i n g . The performance of SOS as c a r r i e r a n d c l o c k recovery systems i n QPSK modems i s s u p e r i o r t o PLL recovery systems. The m u l t i f a c e t e d nature of t h e SO i s r e s p o n s i b l e for t h i s i m p r o v e d p e r f o r m a n c e . I n i t i a l results have been obtained i n mode l ing the non l inea r behavior of t h i s n e t w o r k . The model p r e d i c t s t h e a m p l i t u d e a n d f r e q u e n c y o f f r e e r u n n i n g o s c i l l a t i o n s as well as t h e tracking r a n g e o f t h e SO. -