著者

Ryo KITAMURA Koichiro TANAKA Tadashi MORITA Takayuki TSUKIZAWA Koji TAKINAMI Noriaki SAITO

出版者

一般社団法人 電子情報通信学会

雑誌

IEICE Transactions on Electronics (ISSN:09168524)

巻号頁・発行日

vol.E96.C, no.10, pp.1301-1310, 2013-10-01 (Released:2013-10-01)

参考文献数

14

被引用文献数

3 4 1

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This paper presents an automatic gain control (AGC) system suitable for 60GHz direct conversion receivers. By using a two step gain control algorithm with high-pass filter cutoff frequency switching, the proposed AGC system realizes fast settling time and wide dynamic range simultaneously. The paper also discusses wide-bandwidth variable gain amplifier (VGA) design. By introducing digitally-controlled resistors and gain flattening capacitors, the proposed VGA realizes wide gain range while compensating gain variations due to parasitic capacitance of MOS switches. The AGC system is implemented in a transceiver chipset where RFIC and BBIC are fabricated in 90nm CMOS and 40nm CMOS respectively. The measurement shows excellent dynamic range of 47dB with +/-1dB gain accuracy within 1µs settling time, which satisfies the stringent requirements of the IEEE802.11ad standard.

著者

田中 耕一朗 Koichiro Tanaka

出版者

国際コミュニケ-ション学会

雑誌

国際経営・文化研究 (ISSN:13431412)

巻号頁・発行日

vol.12, no.2, pp.43-60, 2008-03

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Paulo Coelho is one of the most widely read authors in the world today.The main aim of his works is to bring things out of hiding. He considers the world as the place where people make their dreams come true, but they seem to have been kept away from power to do so. In his writings, something inevitable happens and the protagonists are forced to face with their lives. Examining themselves thoroughly, they find out false stories which have been told over and over since their childhood and that finally they accepted. On the other hand, they start to search for truths. Through their eyes, we can notice the world is much richer than we think. Coelho tries to let us know that we have power and possibility so that we can live as we really want.