题目/Title：A fully-integrated reconfigurable dual-band transceiver for short range wireless communication in 180nm CMOS

作者/Author：
                        Xiaobao Yu,Meng Wei,Yun Yin,Ying Song,Siyang Han,Qiongbing Liu,Zongming Jin,Xiliang Liu,Zhihua Wang, Baoyong Chi

会议/Conference：A-SSCC 2014

地点/Location：Kaohsiung, Taiwan

年份/Issue Date：2014.10-12 Nov.

页码/pages：pp. 257 - 260

摘要/Abstract：
A fully-integrated reconfigurable dual-band transceiver (TRX) is presented for short range wireless communication. The TRX has two independent RF front-ends for each band with a shared analog baseband to achieve optimum power and cost. In Sub-GHz (760-960MHz) band, the maximum 75dBc 3rd harmonic rejection ratio (HRR) is achieved by inserting a RFA with notch filtering. In 2.4GHz band, a single-ended-todifferential (S2D) RFA with phase and gain error compensation is proposed. By optimizing two bands separately, the RX achieves a NF of 5.1dB and 4.2dB, respectively. A ™-ǻ fractional-N PLL with two switchable Class-C VCOs is employed to provide the LOs. Moreover, the multi-mode CMOS PAs are integrated, which achieve the measured output P1dB (OP1dB) of 16.3dBm and 14.8dBm with 25% PAE for Sub-GHz and 2.4GHz bands. Furthermore, to optimize the PA’s back-off efficiency, the powercontrol loop is proposed to detect the input signal PAPR in real time and flexibly reconfigure the PA’s operation modes. With this proposed technique, the PAE in Sub-GHz band is improved by ×3.24 and ×1.41 at 9dB and 3dB back-off powers. In 2.4GHz band, the PAE is improved by ×2.17 at 6dB back-off power. The measured results have demonstrated that this presented transceiver has achieved comparable or even better performance in terms of noise, HRR, OP1dB and power efficiency compared with the-state-of-the-arts.