Title :
Ultra-low-voltage circuits for sensor applications powered by free-space optics
Author :
Kleeburg, Travis ; Loo, Jonathan ; Guilar, N.J. ; Fong, Erin ; Amirtharajah, Rajeevan
Author_Institution :
Univ. of California, Davis, CA, USA
Abstract :
Ultra-low-voltage circuits powered and clocked by free-space optical links are implemented in 90 nm digital CMOS. A CDR circuit powered by 4.6 klx illuminance recovers optical data at 50 kb/s using interleaved subthreshold oscillators. A passive-filter ¿¿M produces a 47 dB peak SNDR at 2.1 klx and 256 kHz sample rate. The CDR consumes 217 nW at 300 mV VDD and 200 kb/s. The ¿¿M consumes 102 nW at 400 mV VDD and 1.6 MHz for a figure-of-merit of 23 fJ/conversion-step.
Keywords :
CMOS digital integrated circuits; delta-sigma modulation; electric sensing devices; low-power electronics; optical links; digital CMOS; free-space optical links; sensor applications; ultra-low-voltage circuits; Biomedical optical imaging; Circuits; Clocks; Frequency; Latches; Optical crosstalk; Optical filters; Optical ring resonators; Optical sensors; Optical transmitters;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2010 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-6033-5
DOI :
10.1109/ISSCC.2010.5433863
