Ultra-low-voltage circuits for sensor applications powered by free-space optics

Ultra-low-voltage circuits for sensor applications powered by free-space optics

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 2...

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Bibliographic Details
Published in:2010 IEEE International Solid-State Circuits Conference - (ISSCC) pp. 502 - 503
Main Authors: Kleeburg, T., Loo, J., Guilar, N.J., Fong, E., Amirtharajah, R.
Format: Conference Proceeding
Language:English
Published: IEEE 01-02-2010
Subjects:
Biomedical optical imaging
Circuits
Clocks
Frequency
Latches
Optical crosstalk
Optical filters
Optical ring resonators
Optical sensors
Optical transmitters
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Summary: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 V DD and 200 kb/s. The ¿¿M consumes 102 nW at 400 mV V DD and 1.6 MHz for a figure-of-merit of 23 fJ/conversion-step.
ISBN:1424460336
9781424460335
ISSN:0193-6530
2376-8606
DOI:10.1109/ISSCC.2010.5433863