Design and optimization of phase frequency detector through Taguchi and ANOVA statistical techniques for fast settling low power frequency synthesizer

In this work, a novel phase frequency detector (PFD) architecture using pass transistor logic is proposed. The circuit does not have a reset path, resulting in the elimination of blind zone and dead zone. The phi-V characteristics of the PFD were found to have better linearity across the range of -pi to pi due to the absence of blind and dead zones. The Taguchi and ANOVA statistical techniques were used to optimize the PFD. The optimized PFD exhibited a phase noise of -142.24 dBc/Hz, consumed 5.64 mu W of power and had a maximum operating frequency of 5.25 GHz, and a delay of 10.65 ps. Using this PFD, a GHz-range synthesizer was designed, and its performance characteristics were obtained from circuit simulations using CADENCE Virtuoso. The synthesizer had a power consumption of 4.25 mW at a supply of 1.8 V, achieved a lock time of 2.95 mu s, and could generate frequencies ranging from 0.1 GHz to 4.75 GHz while occupying a chip area of 0.013 mm(2). Moreover, the work introduced a new figure of merit, FoM. The synthesizer has potential applications in various devices such as radio receivers, televisions, mobile phones, satellite receivers, and GPS systems.