Synchronization and Tracking with Synchronous Oscillators

A Synchronous Oscillator (SO) is a synchronization and tracking network which synchronizes, tracks, filters, divides and amplifies in a single process. The SO possesses two bandwidths, which function independently from each other. The resolution bandwidth which determines to a high degree the noise rejection properties of a SO is a function of the regeneration or Q-multiplication process of the circuit whereas, the tracking range is a function of the external signal amplitude. In other tracking networks when the noise rejection properties of the loop is identified, the tracking range is fixed, whereas in a SO the resolution bandwidth and the tracking range can be optimized independently. The SO has also very high input signal sensitivity. SOs can track signals with -45 dB signal-to-noise ratio and maintain several hundred KHz tracking range at this input level.