Abstract
Abstract A cascode LNA coupled with the active inductor to be a degenerated inductor for input-matching, operated at 5.7-GHz, was realized in TSMC CMOS 0.18-um process. It mentions a new method to maintain good performance and cope with the relatively small size in the same time. The LNA achieves a measured power gain of 17 dB and a noise figure of 2.8 dB at 5.7-GHz. The power consumption is only 19mW. The measured data agree with the simulation results well. A 5.7-GHz LNA coupled with the active inductor with input-matching network has been designed, fabricated, and tested. The active inductor in newly-proposed topology plays an important role in improving noise figure, achieving high gain and optimizing power consumption of the LNA. Furthermore, smaller chip size can be obtained in the future. This work demonstrated that an active inductor implemented with a reasonable physical size seems a good alternative for its passive equivalent.