High-performance glitch-free digital frequency synthesiser

Based on modulo- N arithmetic, a new architecture for high-performance digital frequency synthesisers is devised. A set of square waves with the same frequency but different phases is passed through a Gray-encoded multiplexer to generate pulses with a highest frequency. The multiplexer output is used as the reference input for the modulo- N counter. The architecture is realised using the TSMC 0.18 m cell-based process, and its performance is summarised and compared to that of the flying-adder synthesiser.

[1]  Liming Xiu,et al.  A "flying-adder" architecture of frequency and phase synthesis with scalability , 2002, IEEE Trans. Very Large Scale Integr. Syst..

[2]  Liming Xiu,et al.  A "Flying-Adder" frequency synthesis architecture of reducing VCO stages , 2005, IEEE Transactions on Very Large Scale Integration (VLSI) Systems.

[3]  Venceslav F. Kroupa,et al.  Direct digital frequency synthesizers , 1998 .

[4]  Liming Xiu,et al.  An architecture of high-performance frequency and phase synthesis , 2000, IEEE Journal of Solid-State Circuits.

[5]  V.F. Kroupa.  Phase and amplitude disturbances in direct digital frequency synthesizers , 1999, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.