Author(s)

Meng-Ting Hsu^*, Kun-Long Wu, Wen-Chen Chiu

Department and Institute of Engineering, National Yunlin University of Science and Technology, Yunlin.
Microwave Communication and Radio Frequency Integrated Circuit Lab, Department and Institute of Engineering, National Yunlin University of Science and Technology, Yunlin.

This paper presents research on a low power CMOS UWB LNA based on a cascoded common source and current-reused topology. A systematic approach for the design procedure from narrow band to UWB is developed and discussed in detail. The power reduction can be achieved by using body biased technique and current-reused topology. The optimum width of the major transistor device M₁ is determined by the power-constraint noise optimization with inner parasitic capacitance between the gate and source terminal. The derivation of the signal amplification S₂₁ by high frequency small signal model is displayed in the paper. The optimum design of the complete circuit was studied in a step by step analysis. The measurements results show that the proposed circuit has superior S₁₁, gain, noise figure, and power consumption. From the measured results, S₁₁ is lower than -12 dB, S₂₂ is lower than -10 dB and forward gain S₂₁ has an average value with 12 dB. The noise figure is from 4 to 5.7 dB within the whole band. The total power consumption of the proposed circuit including the output buffer is 4.6 mW with a supply voltage of 1 V. This work is implemented in a standard TSMC 0.18 μm CMOS process technology.

Body Bias, Common Source, Low Noise Amplifier (LNA), Low Power, RFCMOS, Ultra-Wideband (UWB)

Hsu, M. , Wu, K. and Chiu, W. (2015) Systematic Approaches of UWB Low-Power CMOS LNA with Body Biased Technique. Wireless Engineering and Technology, 6, 61-77. doi: 10.4236/wet.2015.63007.