A New Blind Zone Free PFD in Fractional-N PLL for Bluetooth Applications

Abstract

This paper presents a new Phase Frequency Detector (PFD) used in the Fractional-N synthesizer PLL for the Bluetooth range frequencies using TSPC based D-FF. The PFD is designed by using 16 transistors. The operating frequency of the PFD can be modelled in between 2.2GHz-3.8GHz with an input reference frequency is applied of about 50MHz. The design of PFD is done by using GPDK 45nm CMOS technology on SPECTRE simulator with 1.8 V supply voltage. The designed PFD is having maximum operating range and free from blind zone. The results reported in this paper are compared and focused on the blind zone and minimum jitter contribution. The designed PFD consumes least power, minimum number of transistors and minimum jitter contributed by the transistors as compared with the reset free based PFD.