Title :
Nonlinear Phase Macromodel Based Simulation/Design of PLLs with Superharmonically Locked Dividers
Author :
Srivastava, Shweta ; Lai, Xiaolue ; Roychowdhury, Jaijeet
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN
Abstract :
We present a novel nonlinear phase macromodel based technique for quickly and accurately predicting super harmonic injection locking (SHIL) in injection-locked frequency dividing (ILFD) oscillators and PLLs. Our approach is useful for both hand analysis and fast/accurate simulation. We derive an analytical phase slope and periodicity based criterion for detecting SHIL from macromodel simulations and present an insightful way of understanding SHIL phenomena using phase macromodels. We present detailed examples of the new technique and validate our results against full SPICE-level simulation, obtaining speedups of 150-200times
Keywords :
injection locked oscillators; integrated circuit design; integrated circuit modelling; phase locked loops; PLL; injection-locked frequency dividing oscillators; nonlinear phase macromodel; super harmonic injection locking; superharmonically locked dividers; Analytical models; Circuit simulation; Computational modeling; Frequency conversion; Frequency synthesizers; Injection-locked oscillators; Jitter; Phase locked loops; Polynomials; Predictive models;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320919
