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A new 2.4 GHz CMOS low-noise amplifier with automatic gain control that provides an enhanced dynamic range of up to 40 dB over conventional low-noise amplifiers is proposed. The proposed low-noise amplifier automatically adjusts its voltage gain by monitoring the amplitude of its output voltage so as to achieve a large dynamic range. The proposed low- noise amplifier allows a receiver system to become adaptive to antenna array, waveguides, and transmission lines, as well as standard antenna signal powers. The amplifier provides a gain of over 35 dB, a noise figure below 0.5 dB, and reflection coefficient below -35 dB at 2.4 GHz. The transient time of the amplifier is approximately 23 mus with the variation of the input RF power of 30 dBm.
Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on (Volume:2 )
Date of Conference: 6-9 Aug. 2006