Title: A CMOS Programmable Gain Amplifier for 2.4-GHz-band IEEE 802.15.4 Standard
Authors: D. Mayor-Duarte, A. Cruz-Ramón, S. Mateos-Angulo, M. San Miguel-Montesdeoca S.L. Khemchandani and J. del Pino
Journal name: Design of Circuits and Integrated Systems Conference XXXI
Abstract: This paper introduces a low power Programmable Gain Amplifier for 2.4-GHz band IEEE 802.15.4 standard in 0.18 μm CMOS technology. This PGA is composed of two paths which are based on two differential Op-Amps connected in cascade. A feedback network is added in order to achieve a wide dynamic range. Furthermore, a varactor was also included to provide enough phase margin under different gains. The PGA has a maximum gain of 42.82 dB and a phase margin of 60º for the desired bandwidth of 8 MHz. Finally, the PGA was added to a front-end device to form a receiver. The receiver achieves 86 dB voltage conversion gain with 80 dB gain variation, 11.5dB noise figure (NF), 30 dBc image rejection and -14 dBm input third-order intercept point (IIP3). It only consumes 6.2 mW.Index terms: Programmable Gain Amplifier (PGA), CMOS RFIC, IEEE 802.15.4 receiver, low-noise amplifier (LNA), passive quadrature mixer, complex filter, transimpedance amplifier (TIA).