Circuit and process parameters issue for 1.57542GHz low noise amplifier in 0.35µm BiCMOS technology

Abstract

In this paper a two-stage low noise amplifier (LNA) in 0.35 mum BiCMOS technology is presented. The first LNA stage is a common source amplifier in the cascode configuration where source inductor degeneration is used for narrowband input matching at 1.57542 GHz. Additional common source amplifier, as the second LNA stage, is added in order to increase total forward gain (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> ) of the LNA. Optimized LNA has -12.01 dB input return loss (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> ), high reverse isolation S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> = -39.19 dB, very high voltage gain S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> = 23.83 dB, output return loss S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">22</sub> = -10.61 dB, noise figure of 2.035 dB and power consumption of 9.9 mA at 3.3 V. The presented LNA offers circuit stability parameters B <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1f</sub> = 953.3 m and K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">f</sub> = 2.558 Significance of the process and mismatch variation and its influence on circuit performance has been demonstrated with Monte Carlo Analysis.