Title :
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
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;
Conference_Titel :
Solid-State Circuits Conference (A-SSCC), 2013 IEEE Asian
Conference_Location :
Singapore
Print_ISBN :
978-1-4799-0277-4
DOI :
10.1109/ASSCC.2013.6691014
