DIGITAL PHASE LOCKED LOOP WITH BROAD LOCK RANGE USING CHAOS CONTROL TECHNIQUE

摘要

The main objective of this paper is to broaden the lock range of the Zero Crossing Digital Phase Locked Loop (ZCDPLL. The stable behaviour of the loop is extended to a larger control parameter by incorporating a feedback stabilization to control the chaotic behaviour of ZCDPLL. The tendency of ZCDPLL to diverge is measured and fed back as a form of linear stabilization. Using this technique the loop lock range is extended. The lock range extension has been confirmed through the use of bifurcation diagram and Lyapunov exponent.