A CMOS wideband LNA with low-loss integrated TX leakage canceller

作者：Kwon Ickjin^*; Choi Induck

来源：IEICE Electronics Express, 2012, 9(13): 1122-1127.

DOI：10.1587/elex.9.1122

• wideband LNA
• leakage canceller
• TX leakage
• insertion loss
• loss compensating amplifier

A CMOS wideband LNA with tunable and low-loss integrated TX leakage canceller is presented. The low RX insertion loss of the TX leakage canceller is achieved by the autotransformer with loss compensating amplifier. The proposed TX leakage canceller is fabricated in 0.13 mu m CMOS process. It provides over 55 dB rejection of the TX leakage at the RX port and the notch frequency can be controlled from 866MHz to 961MHz using a digitally controlled 4-bit switched capacitor array. The RX insertion loss of the wideband LNA with the TX leakage canceller decreased by 1 dB and the NF is decreased about 0.8 dB compared to that without the compensating amplifier.

• 出版日期2012