A 13-pJ/bit 900-MHz QPSK/16-QAM transmitter with band shaping for biomedical application

Author

Xiayun Liu ; Izad, Mehran M. ; Libin Yao ; Chun-Huat Heng

Author_Institution

Dept. of ECE, Nat. Univ. of Singapore, Singapore, Singapore

fYear

2013

fDate

11-13 Nov. 2013

Firstpage

189

Lastpage

192

Abstract

A 900-MHz QPSK/16-QAM transmitter targeted for biomedical application is proposed. Injection locking coupled with direct quadrature modulation at PA provides an efficient way to achieve band shaped QPSK/16-QAM modulation with effective side lobe suppression more than 38 dB. Fabricated in a 65-nm CMOS process, the TX can achieve maximum data rate of 50 Mbps/100 Mbps for QPSK/16-QAM with 6% EVM while occupying only 0.08 mm². Under 0.77-V supply, the TX achieves 26 pJ/bit and 13 pJ/bit respectively with and without activating band shaping.

Keywords

CMOS integrated circuits; UHF integrated circuits; biomedical communication; field effect MMIC; modulators; quadrature amplitude modulation; quadrature phase shift keying; radio transmitters; 16-QAM transmitter; CMOS process; QPSK transmitter; band shaping; biomedical application; direct quadrature modulation; frequency 900 MHz; injection locking; size 65 nm; voltage 0.77 V; Energy efficiency; Injection-locked oscillators; Phase shift keying; Power harmonic filters; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference (A-SSCC), 2013 IEEE Asian

Conference_Location

Singapore

Print_ISBN

978-1-4799-0277-4

Type

conf

DOI

10.1109/ASSCC.2013.6691014

Filename

6691014