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A 2.4 GHz low power wireless transceiver analog front-end for endoscopy capsule system

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Abstract

This work presents the design and implementation of a 2.4 GHz low power wireless transceiver analog front-end for the endoscopy capsule system in 0.25 μm CMOS. The prototype integrates a low-IF receiver analog front-end (low noise amplifier, double-balanced down-converter, band-pass-filtered AGC loop, and ASK demodulator) and a direct-conversion transmitter analog front-end (20 MHz IF PLL with well-defined amplitude control circuit, ASK modulator, up-converter, and output buffer) on a single chip together with one integrated RF oscillator and two LO buffers. Trade-off has been made over the design boundaries of the different building blocks to optimize the overall system performance. All building blocks feature the circuit topologies that enable comfortable operation at low power consumption. As a result, the IC works at a 2.5 V power supply, while only consuming 15 mW in receiver (RX) mode and 14 mW in transmitter (TX) mode. To build a complete transceiver for the endoscopy capsule system, only an antenna, a duplexer, and a digital controller are needed besides the presented analog front-end chip.

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References

  1. Gavriel, I., Gavriel, M., Arkady, G., et al. (2000). Wireless capsule endoscopy. Nature, 405, 417–418

    Google Scholar 

  2. Park, H. J., Nam, H. W., Song, B. S., et al. (2002) Design of bi-directional and multi-channel miniaturized telemetry module for wireless endoscopy. Microtechnologies in medicine & biology 2nd annual international IEEE-EMB special topic conference, Madison, Wisconsin, USA, 273–276

  3. Wang, Z., Xie, X., & Zhang, C. (2003). Bi-directional digital wireless endoscopy system. Chinese patent number: 03109810x, 04, 01

  4. Uyttenhove, K., Vandenbussche, J., Lauwers, E., Gielen, G. G. E., & Steyaert, M. S. J. (2003). Design techniques and implementation of an 8-bit 200-MS/s interpolating/averaging CMOS A/D converter. IEEE Journal of Solid-State Circuits, 38(3), 483–494

    Article  Google Scholar 

  5. Chi, B., Zhu, X., Huang, S., & Wang, Z. (2005). 1 GHz monolithic fractional-N frequency synthesizer with a 3-b third-order delta-sigma modulator. Acta Electronica Sinica, 33(8), 1492–1496

    Google Scholar 

  6. Chi, B., Shi, B., & Wang, Z. (2004). CMOS implementation of RF PLL frequency synthesizer. Acta Electronica Sinica, 32(11), 1761–1765

    Google Scholar 

  7. Chi, B., Zhu, X., Huang, S., & Wang, Z. (2004). 1 GHz monolithic high spectrum purity fractional-N frequency synthesizer with a 3-b third-order delta-sigma modulator. 7th International Conference on Solid-State and Integrated Circuits Technology, Beijing, China, 2, 1504–1507

  8. Kim, J. (2001). CMOS transceiver design for short range wireless telemetry, Ph.D thesis. The University of Minnesota

  9. Gilbert, B. (1968). A precision four-quadrant multiplier with sub-nanosecond response. IEEE Journal Solid-State Circuits, SC-3, 365–373

    Article  Google Scholar 

  10. Huang, P., Chiou, L., & Wang, C. (1998). A 3.3V CMOS wideband exponential control variable gain amplifier. IEEE International Symposium on Circuits and Systems, Monterey, CA, USA, 285–288

  11. Palmisano, G., & Salerno, R. (1998). A replica biasing for constant-gain CMOS open-loop amplifiers. IEEE International Symposium on Circuits and Systems, Monterey, CA, USA, 363–366

  12. Kruiskamp, M. W., & Leenaerts, D. M. W. (1994). A CMOS peak detect sample and hold circuit. IEEE Transactions on Nuclear Science, 41(1), 295–298

    Article  Google Scholar 

  13. Harjani, R., Birkenes, O., & Kim, J. (2000). An IF stage design for an ASK-based wireless telemetry system. IEEE International Symposium on Circuits and Systems, Geneva, Switzerland, 52–55

  14. Gray, P. R., Hurst, P. J., Lewis, S. H., et al. (2001). Analysis and design of analog integrated circuits. John Wiley & Sons, Inc

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Acknowledgments

This work was supported in part by National Natural Science Foundation of China under Grant 90407006, 60475018 and The Fok Ying Tung Education Foundation under Grant 104028.

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Authors and Affiliations

  1. Institute of Microelectronics, Tsinghua University, Beijing, 100084, China

    Baoyong Chi & Zhihua Wang

  2. Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China

    Jinke Yao, Shuguang Han, Xiang Xie & Guolin Li

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  1. Baoyong Chi
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  2. Jinke Yao
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  3. Shuguang Han
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  4. Xiang Xie
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  5. Guolin Li
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  6. Zhihua Wang
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Correspondence to Baoyong Chi.

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Chi, B., Yao, J., Han, S. et al. A 2.4 GHz low power wireless transceiver analog front-end for endoscopy capsule system. Analog Integr Circ Sig Process 51, 59–71 (2007). https://doi.org/10.1007/s10470-007-9036-x

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  • DOI: https://doi.org/10.1007/s10470-007-9036-x

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