PicoRadio RF Transmitter and Gathering Overhaul.

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Customary transmitter structural engineering NOT suitable for PicoRadio in light of the fact that it has ...
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PicoRadio RF Transmitter & Group Update Yuen Hui Chee Prof. Jan Rabaey University of California, Berkeley BWRC Winter Retreat 13 Jan 2005

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PicoRadio RF Quartet Brian Otis Ultra-low power beneficiary structures RF MEMS/CMOS co-plan methods Yuen-Hui Chee Ultra-low power transmitter models Antenna procedures Nathan Pletcher Reactive Radio models Low voltage RF outline Simone Gambini Ultra-low power A/D converters

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Sleeping hubs Peer to Peer join Multi-bounces join Broadcast Wireless Sensor Networks (WSN) – A New Radio Environment Dense system of hubs over a territory 100\'s to 1000\'s of hubs Distance between hubs ≤ 10m 1 Ad-hoc correspondence Multi-jumps Peer to companion interchanges Low information throughput Small parcel estimate Low information rate Bursty movement 1 IEEE 802.15.4-2003 sexually transmitted disease

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Available Power 1 Power Size Cost External Passives CC2420 Radio 2 Challenges System Integration 1 S. Roundy, Energy Scavenging for Wireless Sensor Networks, Kluwer Academic Publishers, 2003 2 Chipcon datasheets

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MICROS 1 TX Frequency Synthesizer 12mW (40%) Modulator+DAC 0.54mW (2%) Mixer 3.06mW (10%) Power Amplifier 14.4mW (48%) Total: 30mW  = 3.3% Current-State-of-the-Art Transmitter MICROS 1 Transmitter Issues Circuit power >> Radiated power H igh overhead Power hungry recurrence synthesizer Inefficient force enhancement Traditional transmitter engineering NOT reasonable for PicoRadio on the grounds that it has unnecessary vitality overhead. 1 P. Choi et. al, ISSCC 2003

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Direct Modulation Transmitter Direct Modulation Eliminates I/Q channels  less overhead power No force hungry blenders RF MEMS based oscillator Provides a low power recurrence reference Fast startup time Simple regulation plans On-off keying "Incline" transmitter is appropriate for low power, low information rate applications

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Sub-100 W Ultra-Low Power Oscillator Ultra-Low Power 1.9GHz FBAR Oscillator Consumes an insignificant force of 89 W Low Power Design Techniques Use high Q FBAR resonator Sub-edge operation Low supply voltage Complementary gadgets to share predisposition current Good stage commotion execution –120dBc/Hz at 100kHz balance FBAR CMOS

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Transmitter Implementation Transmitter Performance Summary More points of interest (counting Rx) will be exhibited in ISSCC 2005

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Radiated Power ~ Circuit Power Wireless Sensor Networks (WSN) Low Complexity Transmitter Circuit Efficiency Perspective Radiated Power 1W Radiated Power >> Circuit Power Wireless LAN, Cellular High Complexity Transmitter PA Efficiency 100mW 10mW 1mW 100uW Data Rate/Spectral Efficiency Design Principles of Low Power Energy Efficient Transmitter: Simplicity and Co-outline

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1.9 GHz Active Antenna TX Oscillator 0.36mW (20%) Antenna 0.03mW (1%) Power Amplifier 1.43mW (79%) Total: 1.8mW  = 52% CMOS + FBAR PILA Antenna Solar Cell What\'s Next: Towards sub-100 µW Transceiver Active Antenna Transmitter ST 0.13 m CMOS

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What\'s Next: Towards sub-100 µW Transceiver Ultra-low power computerized controlled oscillator (DCO) Nominal force ~ 100µW with 0.5V supply Bondwire inductor or on-chip inductor 200MHz tuning range @ 500kHz determination utilizing 9 bits capacitive bank Utilize this low power DCO in a receptive radio beneficiary N. Pletcher

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What\'s Next: Towards sub-100 µW Transceiver 16MHz micromachined resonators – SiGe auxiliary layer, low temp handling Integrated Silicon Clocks 1 µ W Low Power Osc 100 µ W Low Phase Noise Osc B. Otis, N. Pletcher, E. Quévy

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Thank You

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