Title :
A 103 pJ/bit multi-channel reconfigurable GMSK/PSK/16-QAM transmitter with band-shaping
Author :
Xiayun Liu ; Teng Kok Hin ; Chun-Huat Heng ; Yuan Gao ; Wei-Da Toh ; San-Jeow Cheng ; Minkyu Je
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
A 401~406MHz GMSK/PSK/16-QAM TX with band-shaping is realized in 65nm CMOS occupying area of 0.4mm2. Coupled DLL based phase interpolated synthesizer with injection-locked ring oscillator, we achieve frequency tuning and multi-phase output without any need of phase calibration. Through direct quadrature modulation at digital PA, the TX achieves less than 6% EVM for data rate up to 12.5Mb/s. The band-shaping maximizes spectral efficiency with ACPR of -33dB. Consuming 2.57mW, the TX achieves energy efficiency of 103pJ/bit.
Keywords :
frequency synthesizers; minimum shift keying; quadrature amplitude modulation; radio transmitters; band-shaping; coupled DLL based phase interpolated synthesizer; direct quadrature modulation; injection-locked ring oscillator; multichannel reconfigurable GMSK-PSK-16-QAM transmitter; Calibration; Energy efficiency; Frequency shift keying; Phase shift keying; Transmitters; band shaping; energy efficiency; injection locking; reconfigurable; transmitter;
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.2014.7008912
