Low power and high linear reconfigurable CMOS LNA for multi-standard wireless applications

This paper presents a low power and high linear reconfigurable CMOS low noise amplifier for wireless multi-standard applications including GSM (PCS1900), 3G (UMTS), Bluetooth and WLAN b/g. Based on inductive degenerated cascode topology, this LNA achieves a good trade-off between high gain, noise figure and power consumption. The input and output matching networks include controlled MOS-varactor devices to select the desired bands for multi-standard purpose. A post linearization technique is also used to improve the LNA linearity. Implemented in 0.18-μm CMOS technology, the simulated results perform a power gain higher than 21 dB, a noise figure below 2.7 dB, an input return loss less than -12.1dB and more than -3 dBm for the third-order input intercept point in frequency band 1.9-2.4 GHz. For all standards the proposed LNA consumes only a 10.9mW from 1.8V supply voltage.