A Quadrature Demodulator for WCDMA Receiver Using Common-Base Input Stage with Robustness to Transmitter Leakage(<Special Section>Analog Circuits and Related SoC Integration Technologies)
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概要
- 論文の詳細を見る
A quadrature demodulator (QDEMOD) for WCDMA direct-conversion receiver using a common-base input stage is reported. A common-base input stage is robust to parasitic elements and is suitable for integrating on-chip matching circuits to realize small and low-cost RF front-end modules. However, a common-mode blocker signal, such as the transmitter (TX) leakage signal, degrades the noise performance due to DC current increase and intermodulation distortion of the TX leakage signal and noise. We propose a QDEMOD with a common-base input stage capable of suppressing the TX leakage signal using symmetrical inductors. The QDEMOD was fabricated using SiGe BiCMOS process with f_T of 75GHz. The measured results show that the NF degradation does not occur until the TX leakage signal input is larger than -10dBm.
- 社団法人電子情報通信学会の論文
- 2007-06-01
著者
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WATANABE Osamu
Corporate Research & Development Center, Toshiba Corporation
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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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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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