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Sensors 2013, 13(5), 6775-6792; doi:10.3390/s130506775
Article

A Fully Integrated Sensor SoC with Digital Calibration Hardware and Wireless Transceiver at 2.4 GHz

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Received: 12 April 2013; in revised form: 14 May 2013 / Accepted: 14 May 2013 / Published: 21 May 2013
(This article belongs to the Section Physical Sensors)
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Abstract: A single-chip sensor system-on-a-chip (SoC) that implements radio for 2.4 GHz, complete digital baseband physical layer (PHY), 10-bit sigma-delta analog-to-digital converter and dedicated sensor calibration hardware for industrial sensing systems has been proposed and integrated in a 0.18-μm CMOS technology. The transceiver’s building block includes a low-noise amplifier, mixer, channel filter, receiver signal-strength indicator, frequency synthesizer, voltage-controlled oscillator, and power amplifier. In addition, the digital building block consists of offset quadrature phase-shift keying (OQPSK) modulation, demodulation, carrier frequency offset compensation, auto-gain control, digital MAC function, sensor calibration hardware and embedded 8-bit microcontroller. The digital MAC function supports cyclic redundancy check (CRC), inter-symbol timing check, MAC frame control, and automatic retransmission. The embedded sensor signal processing block consists of calibration coefficient calculator, sensing data calibration mapper and sigma-delta analog-to-digital converter with digital decimation filter. The sensitivity of the overall receiver and the error vector magnitude (EVM) of the overall transmitter are −99 dBm and 18.14%, respectively. The proposed calibration scheme has a reduction of errors by about 45.4% compared with the improved progressive polynomial calibration (PPC) method and the maximum current consumption of the SoC is 16 mA.
Keywords: system-on-a-chip; IEEE 802.15.4; wireless PAN; sensor calibration; Internet of Things system-on-a-chip; IEEE 802.15.4; wireless PAN; sensor calibration; Internet of Things
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kim, D.-S.; Jang, S.-J.; Hwang, T.-H. A Fully Integrated Sensor SoC with Digital Calibration Hardware and Wireless Transceiver at 2.4 GHz. Sensors 2013, 13, 6775-6792.

AMA Style

Kim D-S, Jang S-J, Hwang T-H. A Fully Integrated Sensor SoC with Digital Calibration Hardware and Wireless Transceiver at 2.4 GHz. Sensors. 2013; 13(5):6775-6792.

Chicago/Turabian Style

Kim, Dong-Sun; Jang, Sung-Joon; Hwang, Tae-Ho. 2013. "A Fully Integrated Sensor SoC with Digital Calibration Hardware and Wireless Transceiver at 2.4 GHz." Sensors 13, no. 5: 6775-6792.



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