Details
![Duygu Kostak Headshot](https://confcats-catavault.s3.amazonaws.com/CATAVault/ieeecass/master/files/styles/cc_user_photo/s3/user-pictures/duygukostak.jpeg?h=8cd37c8a&itok=KIu5t8wG)
- Affiliation
-
AffiliationÉcole Polytechnique Fédérale de Lausanne
- Country
The discrete time analysis of the phase detector linear range extension in the first and the second order sub-sampling phase-locked loop (SSPLL) is presented. The aim is to understand how much the stability and the pull-in range are affected by the linear range of the sub-sampled phase detector. To change the linear range, sinusoidal, triangular and sawtooth signals are used as the voltage-controlled oscillator (VCO) output signals. The discrete time domain equations of the first and the second order loops are built and solved to determine the stability conditions. The pull-in ranges are examined numerically. The simulations are done in MATLAB, and it is shown that the linear range extension results in an extended pull-in range in both cases, but the initial condition of the loop filter affects the extended pull-in range for the second order loop.