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5.8 GHz RF Transceiver LSI Including On-Chip Matching Circuits

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6 Author(s)
Nagata, M. ; Semicond. Co., Toshiba Microelectron. Corp., Yokohama ; Masuoka, H. ; Fukase, S.-i. ; Kikuta, M.
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A fully integrated 5.8 GHz band transceiver LSI for electronic toll collection systems has been developed. The transceiver consists of LNA, down-converter, ASK detector, ASK modulator, voltage controlled oscillator, and AS-fractional-N PLL. Since internal RF matching circuitry for input terminal of LNA and output terminal of ASK modulator were also integrated, almost no external matching devices are necessary with VSWR<1.25. SBM for ASK modulator and VGA for LO amplitude control were adopted to avoid local leakage and to keep modulation linearity, result, obtained modulation index were over 95%. The infin-shape resonant coil was implemented for VCO to diminish magnetic coupling. Manufacturing process was SiGe BiCMOS process with 47 GHz cut-off frequency

Published in:

Bipolar/BiCMOS Circuits and Technology Meeting, 2006

Date of Conference:

8-10 Oct. 2006