부산대학교 도서관

In this paper, we present a low-power digital variable gain receiver at V-band. To save dc power, both the variable gain amplifier and mixer use current-reused technique. In addition, power detectors are also integrated to generate a digital signal to switch to different gain states to improve linearity and avoid the receiver from saturation. Finally, we use the Cherry-Hooper amplifier to achieve the desired conversion gain and use the source follower to match with 50 $\Omega$ load. At 60 GHz, the gain control range of the receiver is from 30.89 to 18.64 dB. The 3-dB gain bandwidth is larger than 8 GHz under different gain states. The measured average IP 1dB is from -42.55 to -29.23 dBm, and OP 1dB is maintained constant under different gain states for four channels. The total dc power consumption is only 32.5 mW for 1.1 V supplied voltage.