Research Scientist at Analog Devices, Boston, MA
(former Postdoctoral Researcher and Ph.D. Student, MIT)
Welcome! I work at the intersection of ultra-low energy electronics and biomedical applications.
I completed my Ph.D. and S.M. in Electrical Engineering and Computer Science with Professor Anantha Chandrakasan at MIT in 2016 and 2011 respectively, and one year of postdoctoral training in the same group. Prior to this I received a B.A.Sc. in Electrical Engineering from the University of Waterloo, Canada in 2009.
I have held internships in a number of organizations, including Texas Instruments, Intel, the Canadian Department of Defense, Sunnybrook Research Institute, Rogers Cable, and Ontario Power Generation.
In October 2017, I joined Analog Devices as a Research Scientist in the “Analog Garage,” an Emerging Technologies Lab in Boston.
Fast-startup multi-channel transmitter
With a single Bulk Acoustic Wave (BAW) resonator, we demonstrated an 88-MHz-tunable, 2.4-GHz-ISM-band wireless transmitter. The architecture overcomes the limited tuning range of a single BAW by combining the BAW tuning range with a programmable integer-N frequency division and RF single- sideband (SSB) mixing approach. We achieved 0 dBm output power and a fast system startup time of 2.3 μs while consuming only 6.4 mW from a 1.1 V supply.
- P. Nadeau, R. T. Yazicigil, A. P. Chandrakasan, “Single-BAW Multi-Channel Transmitter with Low Power and Fast Start-up Time”, European Solid State Circuits Conference (ESSCIRC), Dig. Tech. Papers, Sep 2017.
Prolonged energy harvesting for ingestible devices
In this work we reported the design and operation of an energy harvesting galvanic cell during continuous in vivo temperature sensing and wireless communication from the stomach. The device delivered an average power of 0.23 μW mm−2 of electrode area for an average of 6.1 days of temperature measurements in the gastrointestinal tract of pigs. This power- harvesting cell could provide power to the next generation of ingestible electronic devices for prolonged periods of time inside the gastrointestinal tract.
- P. Nadeau, et al., “Prolonged energy harvesting for ingestible devices,” Nature Biomedical Engineering. Feb 2017. [Online]. http://dx.doi.org/10.1038/s41551-016-0022
- Press mentions: IEEE Spectrum, PBS Newshour, CBC Spark, BBC FutureProofing
Nanowatt bioluminescence detection
We designed a readout circuit for ultra-low-energy detection of light from genetically engineered, bioluminescent reporter bacteria. The system achieved 600 nJ/conversion from external NPN transistors with an effective photon noise flux of 5.3e5 ph/mm^2. The system was demonstrated to detect bioluminescence from cells engineered for heavy-metal sensing using 4.0e6 cells in 15 uL of sample.
- P. Nadeau, M. Mimee, S. Carim, T. K. Lu, A. P. Chandrakasan, “Nanowatt Circuit Interface to Whole-Cell Bacterial Sensors“ International Solid State Circuits Conference (ISSCC) Dig. Tech. Papers, Feb 2017.
Ultra-low energy wake-up oscillator for IoT
We demonstrated a 4.2pW oscillator where the key idea was to minimize short circuit current. While operating across a wide range of low frequencies from 18 Hz to 1000 Hz, the core oscillator without reference consumes 110 fJ/cycle at 0.6 V. We also used an integrated duty-cycled current source to set the reference frequency. The combined system consumes a total power of 4.2 pW at 18 Hz, resulting in 230 fJ/cycle at 0.6 V.
- P. Nadeau, A. Paidimarri, and A. P. Chandrakasan, “Ultra Low-Energy Relaxation Oscillator With 230 fJ/cycle Efficiency,” IEEE Journal of Solid-State Circuits, vol. 51, no. 4, pp. 789–799, Apr. 2016.
- P. Nadeau, A. Paidimarri, A. Chandrakasan, “4.2 pW timer for heavily duty-cycled systems,” in Proc. IEEE VLSI Symp., pp. C240-C241, June 2015
We designed a three-channel 2.4GHz On-Off-Keying receiver using film bulk acoustic resonators to enable multiple sub-channels of operation within a band at a very low energy per received bit. The receive chain comprises an LNA/mixer architecture that efficiently multiplexes signal pathways without degrading the quality factor of the resonators. The single-balanced mixer and ultra-low power ring oscillator convert the signal to IF, where it is efficiently amplified to enable envelope detection. The receiver consumes a total of 180pJ/b from a 0.7V supply while achieving a BER = 10^-3 sensitivity of -67 dBm at a 1 Mb/s data rate.
- P. Nadeau, A. Paidimarri, P. P. Mercier, A. P. Chandrakasan, “Architectures for Ultra-Low-Power Multi-Channel Resonator-Based Wireless Transceivers,” Ultra-Low-Power Short-Range Radios, Ed. P. P. Mercier, Ed. A. P. Chandrakasan, 2015
- P. Nadeau, A. Paidimarri, P. Mercier, A. Chandrakasan, “Multi-channel 180pJ/b 2.4GHz FBAR-based Receiver,” in Proc. IEEE RFIC Symp., p. 381-384, June 2012