84 dB 5.2 mA digitally-controlled variable gain amplifier

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84 dB 5.2 mA digitally-controlled variable gain amplifier

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A digitally-controlled topology that reduces power dissipation to half that of the conventional one while occupying smaller die area and obtaining higher linearity is presented. In the 0.13 µm CMOS process, the VGA occupies an active area of 0.46 mm2 and dissipates an average current of 5.2 mA at 1.5 V. The gain-variation range is −32 to 52 dB with a gain error of less than ±1 dB. The IIP3, P1dB, NF at 52 dB of gain, and 3 dB bandwidth are −37 to +13 dBm, −42 to −2 dBm, 6.2 dB and 200 MHz, respectively.

Inspec keywords: amplifiers; CMOS analogue integrated circuits

Other keywords: VGA; noise figure 84 dB; power dissipation; current 5.2 mA; digitally-controlled variable gain amplifier; CMOS process; size 0.13 mum; voltage 1.5 V

Subjects: Amplifiers; CMOS integrated circuits

References

    1. 1)
      • Q.-H. Duong , Q. Le , C.-W. Kim , S.-G. Lee . A 95-dB linear low-power variable gain amplfier. IEEE Trans. Circuits Syst. I , 8 , 1648 - 1657
    2. 2)
    3. 3)
      • T.-H. Yun . A low-distortion CMOS IF VGA with linear-in-dB control and temperature compensation. Analog Integr. Circuits Signal Process. , 3 , 185 - 194
http://iet.metastore.ingenta.com/content/journals/10.1049/el_20080135
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