Abstract—A wideband Single-to-Differential Low-Noise Amplifier (STDLNA) is proposed in this paper. An input network and inverters are implemented to achieve input resistance matching of 50ohm. A common-source amplifier and a common-gate amplifier are employed to generate a pair of differential signals. An Agilent momentum electromagnetic simulation tool is used to demonstrate the design concept. With 0.18um CMOS process parameters, the presented STDLNA provides a noise figure of 3.37-3.7dB. The maximum power gains S21 and S31 within the wideband are 13.44dB and 13.47dB, respectively. The input and output reflection coefficients are both below -10dB. The linearity IIP3 at 4GHz is -8dBm. The maximum gain and phase imbalance of the differential output ports are 0.3dB and 2.97 degree, respectively. The core circuit excluded output buffers consumes 19.53mW at 1.3V supply voltage. The chip size including pads is 1.2935mm*1.088mm. 
 

Index Terms—LNA, single to differential, active balun

Cite: Ro-Min Weng, Li-Wei Chen, and Ren-Yuan Huang, "A Low Noise Figure Single-to-Differential Low Noise Amplifier for Wideband Application," International Journal of Electronics and Electrical Engineering, Vol. 4, No. 4, pp. 309-312, August 2016. doi: 10.18178/ijeee.4.4.309-312