Sub-6 GHz Noise-cancelling Balun-LNTA with Dualband Q-enhanced LC Notch Filter for 5G New Radio Cellular Applications

다국어 초록 (Multilingual Abstract)

This paper presents a blocker-tolerant broadband balun-low-noise transconductance amplifier (LNTA) with a high-Q dual-band LC notch filter for 5G new radio (NR) sub-6GHz cellular applications. The proposed balun-LNTA employs a noise-cancelling 1:5 CG-CS balun-LNA topology with local feedback gm-boosting and modified currentbleeding techniques to support entire bands of sub-6 GHz 5G NR application with less than 5 dB NF performance and balanced output of balun-LNTA.
The dual-band Q-boosted LC notch filter with a bandswitchable differential inductor is also proposed to enhance blocker tolerance of the receiver by removing out-of-band blockers and strong transmitter leakage signals. Simulated in a 65-nm CMOS process, the designed balun-LNTA achieves a minimum noise figure of 2.38 dB, a maximum transconductance gain of 44 mS, an S11 of less than ‒10 dB over the frequency range of 50 MHz-6 GHz, an input-referred third-order intercept point of 1.82 dBm, and blocker rejection ratios of more than 15 dB. It consumes 5.9 mA from a nominal supply voltage of 1 V. Its active die area is 0.55 mm2.

참고문헌 (Reference)

1 J. Kim, "Wideband inductorless balun-LNA employing feedback for low-power low-voltage applications" 60 (60): 2833-2842, 2012

2 S. C. Blaakmeer, "Wideband balun-LNA with simultaneous output balancing, noise canceling and distortion-canceling" 43 (43): 1341-1350, 2008

3 T. Kim, "CMOS channelselection low-noise amplifier with high-Q RF bandpass/band-rejection Filter for highly integrated RF front-ends" 30 (30): 280-283, 2020

4 D. Lee, "CMOS channel-selection LNA with a feedforward N-path filter and calibrated blocker cancellation path for FEM-less cellular transceivers"

5 S. Kim, "Broadband balun-LNA employing local feedback gm-boosting technique and balanced loads for low-power low-voltage applications" 67 (67): 4631-4640, 2020

6 A. Vallese, "Analysis and design of an integrated notch filter for the rejection of interference in UWB systems" 44 (44): 331-343, 2009

7 J. Lee, "A sub-6GHz 5G new radio RF transceiver supporting EN-DC with 3.15Gb/s DL and 1.27Gb/s UL in 14nm FinFET CMOS" 54 (54): 3541-3552, 2019

8 K. Kwon, "A hybrid transformerbased CMOS duplexer with a single-ended notchfiltered LNA for highly integrated tunable RF frontends" 28 (28): 1032-1034, 2018

9 D. Shin, "A blocker-tolerant receiver front end employing dual-band N-path balun-LNA for 5G new radio cellular applications"

10 D. Lee, "A blocker-tolerant balunLNTA employing LC notch filter for 5G new radio cellular applications" 2021

11 H. Darabi, "A blocker filtering technique for SAWless wireless receivers" 42 (42): 2766-2773, 2007

12 H. Wang, "A Wideband inductorless LNA with local feedback and noise cancelling for low-power low-voltage applications" 57 (57): 1993-2005, 2010

13 G. Qi, "A SAW-less tunable RF front end for FDD and IBFD combining an electrical-balance duplexer and a switched-LC N-path LNA" 53 (53): 1431-1442, 2018

14 S. Kim, "A 50 MHz-1 GHz 2.3-dB NF noise-cancelling balun-LNA employing a modified current-bleeding technique and balanced Loads" 66 (66): 546-554, 2019

15 M. Tsai, "A 12nm CMOS RF transceiver supporting 4G/5G UL MIMO" 176-177, 2020

16 P. Mak, "A 0.46-mm2 4-dB NF unified receiver front-end for full-band mobile TV in 65-nm CMOS" 46 (46): 1970-1984, 2011

17 C. Luo, "A 0.4-6-GHz 17-dBm B1dB 36-dBm IIP3 channel-selecting low-noise amplifier for SAW-less 3G/4G FDD diversity receivers" 64 (64): 1110-1121, 2016