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A Compact, Reconfigurable CMOS RF Receiver for NavIC/GPS/Galileo/BeiDou
Journal
IEEE Transactions on Microwave Theory and Techniques
ISSN
00189480
Date Issued
2022-07-01
Author(s)
Kanchetla, Vijaya Kumar
Kharalkar, Ajinkya
Jain, Shubham
Khyalia, Santosh Kumar
Joy, Jeffin
Jose, Swetha
Zele, Rajesh
Abstract
This article presents a fully integrated low-intermediate frequency (IF) receiver, Dhruva, for global navigation satellite system (GNSS). The compact receiver uniquely features a fully programmable IP with no external components and no change in the on-chip hardware for various GNSS signals (civilian and precise positioning). The receiver bandwidth is programmable from 2 to 24 MHz for signals around L1, L2, L5, and S frequency bands from Navigation with Indian Constellation (NavIC), global positioning system (GPS), Galileo, and BeiDou. A single-to-differential wideband input-matched noise-canceling low-noise amplifier (LNA) is proposed to avoid the external balun and matching components. An on-chip fractional-N phase-locked loop (PLL) with a single voltage-controlled oscillator (VCO) generates the required local oscillator (LO) frequencies. A dc offset correction circuit is proposed in the variable gain amplifier (VGA) to avoid signal saturation. Fabricated in 65-nm CMOS technology, the receiver draws a current of 38.35 mA from a 1.2-V supply while providing a maximum gain of 101.72 dB with a programmable gain of 53.53 dB and a minimum noise figure (NF) of 3.8 dB. The receiver occupies an active die area of 1.96 mm2, including the I/O padring with ESD protection.
Subjects