Phase locked loop performance with modified loop filters

929-936The possibility of improving the performance of a phase locked loop (PLL) by modifying the loop filter structure has been investigated in this paper. A conventional PLL having sinusoidal type nonlinearity has been studied with the proposed modified filter which is it parallel combination of a normally used low pass filter and a suitably designed high pass filter. Results of the numerical simulation indicate that by a proper choice of filter design parameters the transient response of the PLL can he enhanced and the noise handling capability of the loop can be improved. The results of MAT-LAB simulation experiment are in agreement with the numerical findings.