CMOS front end components for micropower RF wireless systems

ABSTRACT

New applications have recently appeared for a low power, low cost, “embedded radio”. These wireless interfaces for handheld mobile nodes and Wireless Integrated Network Sensors (WINS) must provide spread spectrum signaling for multi-user operation at 902-928 MHz. Cost considerations motivate the development of complete micropower CMOS RF systems operating at previously unexplored low power levels. Micropower CMOS VCO and mixer circuits, developed for these emerging narrow-band communication systems, are reported here. Design methods combining high-Q inductors and weak inversion MOSFET operation enable the lowest reported operating power for RF front end components including a voltage-controlled oscillator (VCO) and mixer operating at frequencies of 400 MHz — 1 GHz. In addition, the VCO, by virtue of its high-Q inductive components, displays the lowest reported phase noise for 1 GHz CMOS VCO system for any power dissipation.

REFERENCES

• 1: A. A. Abidi, "Low-power radio-frequency ICs for portable communications", Proceedings of the IEEE, vol.83, pp. 544-69, April 1995.
• 2: K. Bult , A. Burstein , D. Chang , M. Dong , M. Fielding , E. Kruglick , J. Ho , F. Lin , T. Lin , W. Kaiser , H. Marcy , R. Mukai , P. Nelson , F. Newburg , K. Pister , G. Pottie , H. Sanchez , O. Stafsudd , K. Tan , S. Xue , J. Yao, Low power systems for wireless microsensors, Proceedings of the 1996 international symposium on Low power electronics and design, p.17-21, August 12-14, 1996, Monterey, California, United States
• 3: J. Craninckx, M. S. J. Steyaert, "A 1.8-GHz low-phasenoise CMOS VCO using optimized hollow spiral inductors" IEEE Journal of Solid-State Circuits, vol.32, pp.736-44, May 1997.
• 4: D. B. Leeson, "A simple model of feedback oscillator noise spectra", Proc. IEEE, vol. 54, pp. 329-330, Feb. 1966.
• 5: N. M. Nguyen, R. G. Meyer, "Si IC-compatible inductors and LC passive filters," IEEE J. Solid-State Circuits, vol. 25, no 4, pp. 1028-31, Aug. 1990.
• 6: B. Razavi, "A Study of Phase Noise in CMOS Oscillators", IEEE J. of Solid-State Circuits, vol. 31, pp. 331-343, March 1996.
• 7: S. A. Sanielevici, K. R. Cioffi, B. Ahrani, P. S. Stephenson, D. L. Skoglund, M. Zargari, "A 900 MHz Transceiver Chipset for Two-Way Paging Applications", ISSCC Digest of Technical Papers, pp. 44, February 1998.
• 8: S. Vasudevan, A. Shaikh, "Microwave Characterization of Low Temperature Cofired Tape Ceramic System", Advancing Microelectronics, pp. 16- 25, Nov./Dec. 1995.

INDEX TERMS

Primary Classification:
  B. Hardware
  B.7 INTEGRATED CIRCUITS
      B.7.1 Types and Design Styles
          Subjects: Memory technologies

Additional Classification:
  B. Hardware
  B.8 Performance and Reliability

  C. Computer Systems Organization
  C.3 SPECIAL-PURPOSE AND APPLICATION-BASED SYSTEMS
      Subjects: Real-time and embedded systems

General Terms:
Design, Measurement, Performance, Theory