Ultra low voltage, ultra low power low noise amplifier for 2GHz applications
In this paper, a 0.29V, 2GHz CMOS low noise amplifier (LNA) intended for ultra low voltage and ultra low power applications is developed. The circuit is simulated in standard 0.18?m CMOS MOSIS. A two-stage architecture is then used to simultaneously optimize the gain and noise performance. Using forward-body-biased, the proposed LNA can operate at 0.29V supply voltage, successfully demonstrating the application potential of dynamic threshold voltage technology in the radio frequency region. The LNA provides a good gain of 26.25dB, a noise figure of 2.202dB, reverse isolation (S12) of ?59.04dB, input return loss (S11) of ?122.66dB and output return loss (S22) of -11.61dB, while consuming only 0.96mW dc power with an ultra low supply voltage of 0.29V. To the best of authors knowledge this is the lowest voltage supply and the lowest power consumption CMOS LNA design reported for 2GHz to date.
low voltage cascode topology forward body bias rf