Efficient techniques of fractional-N PLL for pervasive wireless applications

• Published in: International journal of pervasive computing and communications Vol. 18; no. 3; pp. 288 - 303
• Main Authors: Azeem, Mohammed Abdul, Nelakuditi, Usha Rani
• Format: Journal Article
• Language: English
• Published: Bingley Emerald Group Publishing Limited 23.06.2022
• Subjects: Bandwidths; Charge pumps; CMOS; Design; Low voltage; Noise; Phase locked loops; Phase noise; Portable equipment; Remote monitoring; Spectrum allocation; Transistors
• ISSN: 1742-7371; 1742-738X
• DOI: 10.1108/IJPCC-07-2021-0159

Purpose>The purpose of this paper to ensure the rapid developments in the radio frequency wireless technology, the synthesis of frequencies for pervasive wireless applications is crucial by implementing the design of low voltage and low power Fractional-N phase locked loop (PLL) for controlling medical devices to monitor remotely patients.Design/methodology/approach>The developments urge a technique reliable to phase noise in designing fractional-N PLL with a new eight transistor phase frequency detector and a good linearized charge pump (CP) for speed of operation with minimum mismatches.Findings>In applications for portable wireless devices, by proposing a new phase-frequency detector with the removal of dead, blind zones and a modified CP to minimize the mismatch of currents.Originality/value>The results are simulated in 45 nm complementary metal oxide semiconductor generic process design kit (GPDK) technology in cadence virtuoso. The phase noise of the proposed Fractiona-N phase locked loop has–93.18, –101.4 and –117 dBc/Hz at 10 kHz, 100 kHz and 1 MHz frequency offsets, respectively, and consumes 3.3 mW from a 0.45 V supply.