A Transformer Noise-Canceling Ultra-Wideband CMOS Low-Noise Amplifier

概要

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Previously reported wideband CMOS low-noise amplifiers (LNAs) have difficulty in achieving both wideband input impedance matching and low noise performance at low power consumption and low supply voltage. We present a transformer noise-canceling wideband CMOS LNA based on a common-gate topology. The transformer, composed of the input and shunt-peaking inductors, partly cancels the noise originating from the common-gate transistor and load resistor. The combination of the transformer with an output series inductor provides wideband input impedance matching. The LNA designed for ultra-wideband (UWB) applications is implemented in a 90nm digital CMOS process. It occupies 0.12mm2 and achieves |S11| < -10dB, NF < 4.4dB, and |S21| > 9.3dB across 3.1-10.6GHz with a power consumption of 2.5mW from a 1.0V supply. These results show that the proposed topology is the most suitable for low-power and low-voltage UWB CMOS LNAs.
（社）電子情報通信学会の論文
2010-02-01