The planar lightwave circuit (PLC) on silicon substrate offers a promising on-chip integrated solution to polarization-mode dispersion (PMD) compensation for long haul high speed communications. A novel cascaded PLC based PMD compensator is proposed in this paper and a detailed statistical analysis of PMD generated by cascaded PLC circuits is presented. Using Gisin and Pellaux's approach the distributions of first-order PMD produced by various multiple-stage PLC circuits were obtained by Monte Carlo simulation with respect to the phase shift introduced by heating elements in the circuits. The generated PMD was compared with a standard Maxwell distribution and that of a 12-stage nonlinear crystal based PMD compensator. It was found that a 3-stage cascaded PLC circuit yields a performance close to that of the crystal-based PMD compensator, while with a significant reduction in packaged size and enhancement in stability.