TY - JOUR
T1 - A temperature-compensated CMOS LC-VCO enabling the direct modulation architecture in 2.4GHz GFSK transmitter
AU - Tanzawa, T.
AU - Shibayama, H.
AU - Terauchi, R.
AU - Hisano, K.
AU - Ishikuro, H.
AU - Kousai, S.
AU - Kobayashi, H.
AU - Majima, H.
AU - Takayama, T.
AU - Agawa, K.
AU - Koizumi, M.
AU - Hatori, F.
PY - 2004
Y1 - 2004
N2 - The frequency drift of open-loop PLL is an issue for the direct modulation applications such as Bluetooth transceiver. The drift mainly comes from the temperature variation of the VCO during the TX operation. In this paper, we propose the optimum location of the VCO considering the temperature gradient through the full-chip thermal analysis. Moreover, a novel temperature- compensated VCO by employing a new biasing scheme is proposed. The combination of these two techniques enables the power reduction of the transmitter by 33% without sacrificing the performance.
AB - The frequency drift of open-loop PLL is an issue for the direct modulation applications such as Bluetooth transceiver. The drift mainly comes from the temperature variation of the VCO during the TX operation. In this paper, we propose the optimum location of the VCO considering the temperature gradient through the full-chip thermal analysis. Moreover, a novel temperature- compensated VCO by employing a new biasing scheme is proposed. The combination of these two techniques enables the power reduction of the transmitter by 33% without sacrificing the performance.
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M3 - Conference article
AN - SCOPUS:20144388244
SN - 0886-5930
SP - 273
EP - 276
JO - Proceedings of the Custom Integrated Circuits Conference
JF - Proceedings of the Custom Integrated Circuits Conference
T2 - Proceedings of the IEEE 2004 Custom Integrated Circuits Conference, CICC
Y2 - 3 October 2004 through 6 October 2004
ER -