A 0.7 v 3-5 GHz CMOS low noise amplifier for ultra-wideband applications

A low voltage 3-5 GHz CMOS ultra-wideband low noise amplifier is presented in this paper. A second order bandpass input impedance matching technique is used to achieve the broadband input matching. A folded cascode structure is employed to reduce the supply voltage and power consumption. A source follower acts as the buffer stage for broadband output impedance matching. The supply voltage is only 0.7 V. The operation frequency is 3-5 GHz. The maximum power gain is 13.2 dB. The noise figure is 3-4.2 dB. The power consumption of the core circuit is only 6.3 mW.