Abstract
This paper presents a low-power variable gain amplifier (VGA) for the automotive radar. The proposed VGA comprises a gain control stage and an amplifier stage with active inductors. The gain control stage on the circuit is designed to be adjustable in 5 steps from 0 dB to 20 dB. The chip area can be reduced using an active inductor. This circuit also has a lower power dissipation, which reduces slow vibrations. The VGA is fabricated by TSMC 0.13 μm CMOS process. In comparison to conventional research results, the proposed VGA showed a lower power consumption of 17.88 mW, a low noise figure of less than 3.424 dB, and a relatively low active area of 0.034 mm².
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