超寬頻接收機之關鍵模組研製

本論文利用CMOS 0.18 μm製程實現了一個應用於UWB的低雜訊放大器。此電路結合LC-ladder filter與負回授電路。利用LC-ladder filter來達到良好的輸入端匹配，利用回授電路使得寬頻增益能較平坦，最後模擬頻寬為3-10 GHz，頻帶內的雜訊指數幾乎都在4 dB以下，最高的增益達到11.3 dB，輸入返回損失都低於-11 dB，輸出返回損失都低於 -12 dB，IIP3為2 dBm，消耗功為18.79 mW。　　我們也利用CMOS 0.18 μm 製程實現一個雙頻帶的交叉偶合配對的壓控振盪器。使用切換電感的方法，使單一壓控振盪器達到雙頻帶的振盪頻率。此壓控振盪器使用0.9 V的電壓供應，且3,947及8,002 MHz的相位雜訊在1 MHz偏移時分別為-113.84 dBc/Hz及-110.23 dBc/Hz。此壓控振盪器的核心電路在兩工作頻帶下功率消耗為7.2 mW。

關鍵字

超寬頻；壓控振盪器；低雜訊放大器

並列摘要

A new ultra-wideband (UWB) CMOS low-noise amplifier (LNA) is proposed, which includes an LC-ladder filter with a resistive shunt-feedback. The LC-ladder filter provides a good input matching and the resistive shunt-feedback renders unconditional stability and flat gain over the passband. The proposed LNA is implemented in 0.18 μm CMOS technology. Simulations show a −3 dB gain bandwidth of 3-10 GHz, the noise figure is less than 4 dB over most of the band, the maximum gain is 11.3 dB, The return loss is lower than −11 dB at the input, and lower than −12 dB at the output, the IIP3 is 2 dBm, and the power consumption is 18.79 mW. A dual-band PMOS cross-coupled pair VCO is designed and fabricated in a 0.18 μm CMOS process. By using the switched-inductor approach, dual band operation is realized using a single VCO. The phase noise at 1 MHz offset is −113.84 dBc/Hz at 3,947 MHz and −110.23 dBc/Hz at 8,002 MHz. The core VCO consumes 7.2 mW in both bands at the supply voltage of 0.9 V.

並列關鍵字

UWB ； VCO ； LNA

參考文獻

[1] G Cusmai, M. Brandolini, P. Rossi, and F. Svelto “A 0.18-μm CMOS selective receiver front-end for UWB applications,” IEEE J. Solid-State Circuits, vol. 41, no. 8, pp. 1764-1771, Aug. 2006.

[2] Z. Li and K. K. O, “A low-phase-noise and low-power multiband CMOS voltagecontrolled oscillator,” IEEE J. Solid-State Circuits, vol. 40, no. 6, pp. 1296-1302, June

[3] A. Bevilacqua and A. M. Niknejad, “An ultra-wideband CMOS LNA for 3.1 to 10.6 GHz wireless receiver,” IEEE ISSCC Dig., pp. 382-383, 2004.

[4] B. Shi and M. Y. W. Chia, “A 3.1 - 10.6 GHz RF front-end for multiband UWB wireless receivers,” IEEE Radio Freq. Integ. Circuits Symp., pp. 343-346, June 2005.

[5] H. J. Lee, D. S. Hal, and S. S. Choi, “A 3 to 5GHz CMOS UWB LNA with input matching using miller effect,” IEEE Int. Solid-State Circuits Conf., pp. 731-740, Feb.,

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超寬頻接收機之關鍵模組研製

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