PLL system with a broad band of initial mismatches

Abstract

The article suggests an unconventional option of construction of the phase-locked loop systems (PLL systems) with electronically tunable filters (ETF) in the control loop in the form of multielement chain triple-pole structure on the nonlinear elements and also homogeneous distributed RC-structures (long lines). It makes possible to increase considerably a PLL capture range without decrease of the system performance. The simulation data and the methodology of ETF calculation for the required frequency range with transfer functions are submitted.