A 2.4-GHz temperature-compensated CMOS LC-VCO for low frequency drift low-power direct-modulation GFSK transmitters

Toru Tanzawa; Kenichi Agawa; Hiroyuki Shibayama; Ryota Terauchi; Katsumi Hisano; Hiroki Ishikuro; Shouhei Kousai; Hiroyuki Kobayashi; Hideaki Majima; Toru Takayama; Masayuki Koizumi; Fumitoshi Hatori

doi:10.1093/ietele/e88-c.4.490

A 2.4-GHz temperature-compensated CMOS LC-VCO for low frequency drift low-power direct-modulation GFSK transmitters

Toru Tanzawa, Kenichi Agawa, Hiroyuki Shibayama, Ryota Terauchi, Katsumi Hisano, Hiroki Ishikuro, Shouhei Kousai, Hiroyuki Kobayashi, Hideaki Majima, Toru Takayama, Masayuki Koizumi, Fumitoshi Hatori

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A frequency drift of open-loop PLL is an issue for the direct-modulation applications such as Bluetooth transceiver. The drift mainly comes from a temperature variation of VCO during the transmission operation. In this paper, we propose the optimum location of the VCO, considering the temperature gradient through the whole-chip thermal analysis. Moreover, a novel temperature- compensated VCO, 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.

Original language	English
Pages (from-to)	490-495
Number of pages	6
Journal	IEICE Transactions on Electronics
Volume	E88-C
Issue number	4
DOIs	https://doi.org/10.1093/ietele/e88-c.4.490
Publication status	Published - 2005 Apr
Externally published	Yes

Keywords

Bluetooth
CMOS LC-VCO
Direct modulation
GFSK
Low power

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1093/ietele/e88-c.4.490

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Tanzawa, T., Agawa, K., Shibayama, H., Terauchi, R., Hisano, K., Ishikuro, H., Kousai, S., Kobayashi, H., Majima, H., Takayama, T., Koizumi, M., & Hatori, F. (2005). A 2.4-GHz temperature-compensated CMOS LC-VCO for low frequency drift low-power direct-modulation GFSK transmitters. IEICE Transactions on Electronics, E88-C(4), 490-495. https://doi.org/10.1093/ietele/e88-c.4.490

Tanzawa, T, Agawa, K, Shibayama, H, Terauchi, R, Hisano, K, Ishikuro, H, Kousai, S, Kobayashi, H, Majima, H, Takayama, T, Koizumi, M & Hatori, F 2005, 'A 2.4-GHz temperature-compensated CMOS LC-VCO for low frequency drift low-power direct-modulation GFSK transmitters', IEICE Transactions on Electronics, vol. E88-C, no. 4, pp. 490-495. https://doi.org/10.1093/ietele/e88-c.4.490

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abstract = "A frequency drift of open-loop PLL is an issue for the direct-modulation applications such as Bluetooth transceiver. The drift mainly comes from a temperature variation of VCO during the transmission operation. In this paper, we propose the optimum location of the VCO, considering the temperature gradient through the whole-chip thermal analysis. Moreover, a novel temperature- compensated VCO, 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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AU - Terauchi, Ryota

AU - Hisano, Katsumi

AU - Ishikuro, Hiroki

AU - Kousai, Shouhei

AU - Kobayashi, Hiroyuki

AU - Majima, Hideaki

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AU - Koizumi, Masayuki

AU - Hatori, Fumitoshi

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AB - A frequency drift of open-loop PLL is an issue for the direct-modulation applications such as Bluetooth transceiver. The drift mainly comes from a temperature variation of VCO during the transmission operation. In this paper, we propose the optimum location of the VCO, considering the temperature gradient through the whole-chip thermal analysis. Moreover, a novel temperature- compensated VCO, 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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A 2.4-GHz temperature-compensated CMOS LC-VCO for low frequency drift low-power direct-modulation GFSK transmitters

Abstract

Keywords

ASJC Scopus subject areas

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