A Fast f_c Automatic Tuning Circuit with Wide Tuning Range for WCDMA Direct Conversion Receiver Systems(<Special Section>Analog Circuits and Related SoC Integration Technologies)

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概要

• 論文の詳細を見る

• A fast f_c automatic tuning circuit suitable for WCDMA systems is proposed. The circuit employs master-slave architecture using digitally controlled G_m-C filter for avoiding long transient response. The tuning feedback loop contains a 2-bit up-down counter ADC for fast tuning operation. Furthermore, to avoid degradation of f_c tuning accuracy due to reference feedthrough, an analog loop filter with notch located near reference frequency is used. The fast f_c automatic tuning circuit is fabricated in a SiGe BiCMOS process. The tuning time within 200μs is achieved for 35 chips from 2 lots and the standard deviation of 25.5kHz is obtained for the average f_c of 2.12MHz.

• 社団法人電子情報通信学会の論文
• 2007-06-01

著者

• ITO Rui

  Toshiba

• Iida T

  Pioneer Corp. Saitama Jpn

• Arai Tadashi

  Semiconductor Campany Toshiba Corporation

• Watanabe O

  Toyota Central Research And Development Laboratories Inc.

• Ito Rui

  Corporate Research & Development Center Toshiba Corporation

• WATANABE Osamu

  Corporate Research & Development Center, Toshiba Corporation

• SAIGUSA Shigehito

  Semiconductor Campany, Toshiba Corporation

• ITAKURA Tetsuro

  Corporate Research & Development Center, Toshiba Corporation

• Itakura T

  Toshiba Corp. Kawasaki‐shi Jpn

• Itakura Tetsuro

  Corporate Research & Developmentcenter Toshiba Corporation

• Arai Tadashi

  Semiconductor Company Toshiba Corporation

• Arai Tadashi

  Toshiba Corp. Yokohama‐shi Jpn

• Saigusa Shigehito

  Semiconductor Company Toshiba Corporation

• 渡辺 磨

  Department Of Radiology Akita University School Of Medicine

• Watanabe Osamu

  Department Of Surgery Tokyo Women's Medical University Daini Hospital

• Arai T

  Semiconductor Campany Toshiba Corporation

• Watanabe O

  Corporate Research & Development Center Toshiba Corporation

• Watanabe O

  Univ. Tsukuba Tsukuba

• 渡辺 磨

  Toyota Central R&d Labs. Inc

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