Advances in Radio Science www.adv-radio-sci.net 1684-9965 1684-9973 3 Kleinheubacher Berichte 2004 2005 10.5194/ars-3-299-2005 http://www.adv-radio-sci.net/3/299/2005/ http://www.adv-radio-sci.net/3/299/2005/ars-3-299-2005.html http://www.adv-radio-sci.net/3/299/2005/ars-3-299-2005.pdf 299 303 2005-05-13 Design of a LNA in the frequency band 1.8-2.2GHz in 0.13μm CMOS Technology E. Di Gioia C. Hermann H. Klar Technical University of Berlin, Institute of Microelectronics, Einsteinufer 17, 10587 Berlin, Germany The subject of this work is a low noise amplifier (LNA), operating in the frequency range 1.8-2.1GHz. The CMOS 0.13μm technology is used in respect to the low cost of the final device. Among the specifications, a variable gain and an adjustable working frequency are required. In particular, four different working modes are provided: 1.8, 1.9 and 2.1GHz high gain and 2.1GHz low gain. The amplifier is designed to be used as first stage of a receiver for mobile telephony. For this reason low power consumption is taken into consideration (low supply voltage and low drain currents). A simple digital circuit, integrated on-chip, is used to select the operating mode of the LNA by means of two input pins. A Noise figure of 1dB is obtained with a supply voltage of 0.8V.