Jitter decomposition in ring oscillators

It is important to separate random jitter from deterministic jitter to quantify their contributions to the total jitter. This paper identifies the limitations of the existing methodologies for jitter decomposition, and develops a new and efficient approach using time lag correlation functions to decompose different jitter components. The theory of the approach is developed and it is applied to a ring oscillator simulated in a 0.6-mum AMI CMOS process. Results show good agreement between the theory and Hspice simulation