A Low LO Leakage and Low Power LO Buffer for Direct-Conversion Quadrature Demodulator(RF, <Special Section>Analog Circuit and Device Technologies)
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概要
- 論文の詳細を見る
A DC offset caused by self-mixing is a serious problem for direct-conversion receivers. Local oscillation (LO) leakage via quadrature demodulators (QDEMOD) must be suppressed in order to achieve a low DC offset. An LO buffer which drives QDEMOD mainly causes the LO leakage. We proposed an LO buffer which has a high-pass frequency response with small occupied area and low current consumption. A QDEMOD using the proposed LO buffer is fabricated using a SiGe BiCMOS process. Measured low LO leakage of -70 dBm is achieved, which is 10 dB lower than that of a QDEMOD with a conventional LO buffer. This measured result indicates that the proposed LO buffer is suitable for QDEMODs for direct-conversion receivers.
- 社団法人電子情報通信学会の論文
- 2005-06-01
著者
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WATANABE Osamu
Corporate Research & Development Center, Toshiba Corporation
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FUJIMOTO Ryuichi
Corporate Research & Development Center, Toshiba Corp.
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MITOMO Toshiya
Corporate Research & Development Center, Toshiba Corp.
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Fujimoto Ryuichi
Semiconductor Company Toshiba Corp.
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Otaka Shoji
Corporate Research & Development Center Toshiba Corporation
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Otaka Shoji
Corporate Research & Development Center Toshiba Corp.
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Mitomo Toshiya
Corporate Research & Development Center Toshiba Corp.
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KAWAGUCHI Shunji
Semiconductor Company, Toshiba Corp.
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WATANABE Osamu
Toshiba Corporation
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Kawaguchi Shunji
Semiconductor Company Toshiba Corp.
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