Johan Wernehag
Department of Electroscience Department of Electroscience, Lund University, Sweden
Henrik Sjölund
Department of Electroscience Department of Electroscience, Lund University, Sweden
Download article
Published in: GigaHertz 2003. Proceedings from the Seventh Symposium
Linköping Electronic Conference Proceedings 8:13, p.
Published: 2003-11-06
ISBN:
ISSN: 1650-3686 (print), 1650-3740 (online)
A transmitter consisting of a voltage controlled oscillator (VCO) and power ampli-fier (PA) for the 400 MHz Medical Implanted Communication System band (MICS) was built in a standard 0.35-µm CMOS process. A push pull architecture was used for both the VCO and the PA. Two off-chip inductors were needed. The design was optimized for 400 µW output power at 3 V supply; which resulted in an efficiency of 26 %. This gives a total power consumption of 1.6 mW; of which the VCO uses about 0.3 mW.
[1] ETSI EN 301 839-1
[2] www.coilcraft.com
[3] Thomas H. Lee. The Design of CMOS Radio-Frequency Integrated Circuits. Cambridge University Press 1998.
[4] Henrik Sj¨oland. Improved Switched Tuning of Differential CMOS VCOs. IEEE transactions on circuits and system II: analog and digital signal processing; vol. 49; no. 5; may 2002.
[5] Ronold W. P. King; Glen S. Smith. Antennas in Matter. The MIT Press 1981.
