AN INDUCTORLESS WIDE BAND RF FRONT END WIRELESS RECEIVER

Abstract

An inductorless wideband RF front end receiver is designed using different techniques to obtain suitable gain, low NF, high linearity, low power consumption and small area. The LNA is implemented using both the passive and active feedback with current reuse techniques to achieve the required low NF, wide BW, and suitable gain. An active post distortion (APD) technique is used to achieve high linearity. The LNA circuit is designed in 0.13 µm UMC technology and occupies 0.01 mm2 area with off chip input coupling capacitor. It achieves a gain of 15 dB over a bandwidth of 4.7 GHz. The NF does not exceed 2.9 dB across the entire BW, while the IIP3 is maintained above -1.2 dBm. It consumes 11.07 mW DC power from 1.8V supply. The mixer operates in subthreshold region to save power and improve linearity. An active load and cross coupled capacitors are used to increase the gain and improve the linearity without increasing the power consumption. The mixer circuit is designed in 0.13µm UMC technology and occupies 0.055 mm2 area. It achieves a gain of 13.12 dB over a BW of 8.1 GHz using 0.54 mW dc power from 0.6 V voltage supply, with NF of 10.4 dB and IIP3 of -2.4 dBm. The post layout simulation results of the overall front end circuit reveal that this front-end receiver can achieve a voltage gain of 14.23 dB across a BW of 4.5 GHz with a NF of 11 dB and IIP3 of -3.7 dBm. It consumes 8.4 mW dc power and occupies 0.09 mm2.