Nonlinear dynamics of a class of digital tan-lock loops with non-ideal phase detector
The unequal propagation time in two arms of tan-lock phase detector is modeled as fractional delay. Dynamics of digital tan-lock loop (DTL) with fractional delay is examined analytically and numerically. Fractional delay of proper magnitude broadens stable zone and frequency acquisition range of the loop. Inclusion of deliberate fractional delay may be an useful technique of high performance DTL design.
digital tan-lock loop fractional delay frequency acquisition range stability analysis