A Fully-Integrated Reconfigurable Dual-Band Transceiver for Short Range Wireless Communications in 180 nm CMOS

Xiaobao Yu, Meng Wei, Yun Yin, Ying Song, Siyang Han, Qiongbing Liu, Zongming Jin, Xiliang Liu, Zhihua Wang, Yichuang Sun, Baoyong Chi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
44 Downloads (Pure)

Abstract

A fully-integrated reconfigurable dual-band (760-960 MHz and 2.4-2.5 GHz) transceiver (TRX) for short range wireless communications is presented. The TRX consists of two individually-optimized RF front-ends for each band and one shared power-scalable analog baseband. The sub-GHz receiver has achieved the maximum 75 dBc 3rd-order harmonic rejection ratio (HRR3) by inserting a Q-enhanced notch filtering RF amplifier (RFA). In 2.4 GHz band, a single-ended-to-differential RFA with gain/phase imbalance compensation is proposed in the receiver. A ΣΔ fractional-N PLL frequency synthesizer with two switchable Class-C VCOs is employed to provide the LOs. Moreover, the integrated multi-mode PAs achieve the output P1dB (OP1dB) of 16.3 dBm and 14.1 dBm with both 25% PAE for sub-GHz and 2.4 GHz bands, respectively. A power-control loop is proposed to detect the input signal PAPR in real-time and flexibly reconfigure the PA's operation modes to enhance the back-off efficiency. With this proposed technique, the PAE of the sub-GHz PA is improved by x3.24 and x1.41 at 9 dB and 3 dB back-off powers, respectively, and the PAE of the 2.4 GHz PA is improved by x2.17 at 6 dB back-off power. The presented transceiver has achieved comparable or even better performance in terms of noise figure, HRR, OP1dB and power efficiency compared with the state-of-the-art.

Original languageEnglish
Article number7226882
Pages (from-to)2572-2590
Number of pages19
JournalIEEE Journal of Solid State Circuits
Volume50
Issue number11
DOIs
Publication statusPublished - 27 Aug 2015

Keywords

  • Dual band
  • Harmonic analysis
  • Impedance matching
  • Mixers
  • Noise
  • Receivers
  • Transceivers

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