Title :
RF transconductor linearization technique robust to process, voltage and temperature variations
Author :
Subramaniyan, Harish Kundur ; Klumperink, Eric A. M. ; Nauta, Bram ; Venkatesh, Svetha ; Kiaei, Ali
Author_Institution :
IC-Design Group, Univ. of Twente, Enschede, Netherlands
Abstract :
A new reconfigurable linearized low noise transconductance amplifier (LNTA) design for a software-defined radio receiver is presented. The transconductor design aims at realizing high linearity at RF in a way that is robust for Process, Voltage and Temperature variations. It exploits resistive degeneration in combination with a floating battery by-pass circuit and replica biasing to improve IIP3 in a robust way. The LNTA with current domain mixer is implemented in a 45nm CMOS process. Compared to an inverter based LNTA with the same transconductance, it improves PIIP3 from 2 dBm to a robust PIIP3 of 8 dBm at the cost of 67% increase in power consumption.
Keywords :
CMOS integrated circuits; linearisation techniques; low noise amplifiers; mixers (circuits); radio receivers; replica techniques; software radio; CMOS process; IIP3 improvement; RF transconductor linearization technique; current domain mixer; floating battery by-pass circuit; inverter based LNTA design; power consumption; process variations; reconfigurable linearized low noise transconductance amplifier design; replica biasing; resistive degeneration; size 45 nm; software-defined radio receiver; temperature variations; voltage variations; CMOS integrated circuits; Inverters; Linearity; MOSFET; Noise; Receivers; Robustness; CMOS; Linearity; PVT; Receiver; Software-defined Radio; Transconductor; Transconductor Figure-of-Merit; robust circuit design;
Conference_Titel :
Solid-State Circuits Conference (A-SSCC), 2014 IEEE Asian
Conference_Location :
KaoHsiung
Print_ISBN :
978-1-4799-4090-5
DOI :
10.1109/ASSCC.2014.7008928
