Design of Broadband Low Noise Amplifier for Multi-standard Receiver

Abstract

This thesis is an attempt to study challenging problems that are faced Broadband Low Noise Amplifiers (BB-LNAs) in multiband/multistandard applications. The main target of this thesis aims to tackle the design trade off among low noise, high linearity, and broadband impedance matching. A comparison between several topologies of wideband common gate LNA including conventional and multiple feedback topologies is presented. This comparison is based on finding the best Figure Of Merit (FOM) of the different architectures. This comparsion is verified by using UMC 0:13 m CMOS technology. Results show that for a certain bias current, the FOM is appreciably enhanced. For the conventional common gate LNA with current reuse, the highest FOM is obtained in spite of its high noise figure compared to iii iv other architectures. In addition, the proposed broadband LNA using UMC 0:13 m CMOS technology for multiband/multistadard application is presented. The proposed broadband LNA utilizes a feedback technique that is based on composite NMOS/PMOS cross-coupled transistor and feedforward technique that is based on difference amplifier. key words: CMOS, composite transistor pair, multi-standard, Low Noise Amplifier (LNA), Noise Figure (NF), noise cancellation, linearity, Figure Of Merit (FOM).