A low-power small-size transmitter with discrete-time baseband filter for LTE in 65 nm CMOS

This paper presents the design of a low-power small-size transmitter with discrete-time baseband filter for LTE application operating at 1.8-2 GHz. The transmitter achieves 4.5 dBm output power with more than -46 dBc of LO feedthrough suppression and -38 dBc image rejection ratio. At -0.3 dBm transmitted power of LTE 5 MHz channel, ACLR is measured below -42 dBc for both upper and lower channels with 1.83 and 2.47 % EVM for QPSK and 16-QAM modulation signals, respectively. The prototype chip is fabricated in a 65 nm CMOS technology and dissipates 59 mA current from 1.2 V supply and 13 mA from 2.5 V supply.

[1]  Aarno Pärssinen,et al.  A Multimode Transmitter in 0.13 $\mu\hbox{m}$ CMOS Using Direct-Digital RF Modulator , 2007, IEEE Journal of Solid-State Circuits.

[2]  K. Sahota,et al.  A configurable multi-band multi-mode transmitter with spur cancellation through digital baseband , 2011, 2011 Symposium on VLSI Circuits - Digest of Technical Papers.

[3]  Bram Nauta,et al.  Direct-digital modulation (DIDIMO) transmitter with −156dBc/Hz Rx-band noise using FIR structure , 2012, 2012 Proceedings of the ESSCIRC (ESSCIRC).

[4]  Omid Oliaei,et al.  A multiband multimode transmitter without driver amplifier , 2012, 2012 IEEE International Solid-State Circuits Conference.

[5]  Jan Craninckx,et al.  A CMOS IQ direct digital RF modulator with embedded RF FIR-based quantization noise filter , 2011, 2011 Proceedings of the ESSCIRC (ESSCIRC).

[6]  Stefania Sesia,et al.  LTE - The UMTS Long Term Evolution, Second Edition , 2011 .

[7]  Stefan Heinen,et al.  Design of an RF-DAC in 65nm CMOS for multistandard, multimode transmitters , 2009, 2009 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).

[8]  Jonathan Borremans,et al.  A multiband LTE SAW-less modulator with −160dBc/Hz RX-band noise in 40nm LP CMOS , 2011, 2011 IEEE International Solid-State Circuits Conference.

[9]  Domine M. W. Leenaerts,et al.  A 2.4-GHz 0.18-/spl mu/m CMOS self-biased cascode power amplifier , 2003 .