DocumentCode :
1803844
Title :
A 17pJ/bit 915MHz 8PSK/O-QPSK transmitter for high data rate biomedical applications
Author :
Izad, Mehran M. ; Heng, Chun-Huat
Author_Institution :
Nat. Univ. of Singapore, Singapore, Singapore
fYear :
2012
fDate :
9-12 Sept. 2012
Firstpage :
1
Lastpage :
4
Abstract :
A 915MHz 8PSK/O-QPSK transmitter for high data rate biomedical applications is presented in this paper. The transmitter architecture is based on a sub-harmonic injection-locked ring oscillator and a direct modulated power amplifier to simplify the architecture and reduce the power consumption while achieving spectral efficient modulation. The spurious performance of the injection-locked ring oscillator and the impact of circuit non-idealities on the transmitter performance are also discussed. Fabricated prototype in 65nm CMOS consumes only 938μW at the data rate of 55Mbps and achieves energy efficiency of 17pJ/bit which is the lowest reported to date. The chip occupies an active area of 0.038mm2. The measured EVM is better than 3.8% in 8PSK mode (at 55Mbps) while delivering -15dBm of output power.
Keywords :
amplifiers; biomedical communication; injection locked oscillators; power consumption; quadrature phase shift keying; radio transmitters; 8PSK/O-QPSK transmitter; CMOS; bit rate 55 Mbit/s; circuit nonideality; direct modulated power amplifier; frequency 915 MHz; power 938 muW; power consumption; spectral efficient modulation; subharmonic injection locked ring oscillator; transmitter architecture; Frequency modulation; Injection-locked oscillators; Power demand; Ring oscillators; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2012 IEEE
Conference_Location :
San Jose, CA
ISSN :
0886-5930
Print_ISBN :
978-1-4673-1555-5
Electronic_ISBN :
0886-5930
Type :
conf
DOI :
10.1109/CICC.2012.6330560
Filename :
6330560
Link To Document :
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