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

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 achieve...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2015-11, Vol.50 (11), p.2572-2590
Main Authors: Yu, Xiaobao, Wei, Meng, Yin, Yun, Song, Ying, Han, Siyang, Liu, Qiongbing, Jin, Zongming, Liu, Xiliang, Wang, Zhihua, Sun, Yichuang, Chi, Baoyong
Format: Article
Language:English
Subjects:
Amplifiers
back-off efficiency enhancement
CMOS
Compensation
Dual band
Filtering
Harmonic analysis
HRR
Impedance matching
Mixers
Noise
Noise levels
PAPR
power amplifier
Receivers
reconfigurable
Synthesizers
Transceivers
Wireless communication
wireless transceiver
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Summary: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 ×3.24 and ×1.41 at 9 dB and 3 dB back-off powers, respectively, and the PAE of the 2.4 GHz PA is improved by ×2.17 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.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2015.2462345