A 0.2-5 GHz LNA with linearity enhancement using double capacitive cross-coupling technique

This paper describes a wideband LNA with linearity enhancement and noise improvement covering the frequency range of 0.2-5 GHz. The double capacitive cross-coupling technique is employed to exploit transconductance nonlinearity cancellation and improve the noise performance at low frequency. The proposed LNA is simulated in a standard 0.13-μm CMOS technology. The LNA achieves an input-referred third-order intercept point of 9-11.5 dBm, a noise figure of 2.74-3.58 dB, a voltage gain of 17.0-19.2 dB, and an input impedance matching of less than -10 dB along the entire band. The power consumption is only 3.0 mW with a 1.5 V power supply.

[1]  Tae Wook Kim,et al.  A CMOS RF Programmable-Gain Amplifier for Digital TV With a $+$9-dBm IIP3 Cross-Coupled Common-Gate LNA , 2012, IEEE Transactions on Circuits and Systems II: Express Briefs.

[2]  Tae Wook Kim,et al.  A 2.88 mW $+$ 9.06 dBm IIP3 Common-Gate LNA With Dual Cross-Coupled Capacitive Feedback , 2015, IEEE Transactions on Microwave Theory and Techniques.

[3]  Kiat Seng Yeo,et al.  Analysis and Design of Ultra-Wideband Low-Noise Amplifier With Input/Output Bandwidth Optimization and Single-Ended/Differential-Input Reconfigurability , 2014, IEEE Transactions on Industrial Electronics.

[4]  Bumman Kim,et al.  A Wideband Differential Low-Noise-Amplifier With IM3 Harmonics and Noise Canceling , 2015, IEEE Microwave and Wireless Components Letters.

[5]  Zengqi Wang,et al.  1.8 mW wideband LNA with double capacitor-cross-coupled feedback , 2014 .

[6]  Joy Laskar,et al.  A 3.6mW differential common-gate CMOS LNA with positive-negative feedback , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.