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2004•Unpublished venueRequires access

A 1.8-V 73-dB dynamic-range CMOS variable gain amplifier

Rui Saito, Kikuko Hosoda, Akira Hyogo, Toru Maruyama, H. Komuraki, H. Sato, Kawori Sekine

Open publisher page 8 citations

Abstract

A linear-in-dB VGA is fabricated in 0.18-/spl mu/m CMOS technology. It is composed of three cascaded VGAs. Each of them is based on a conventional VGA and a proposed gain control circuit. To avoid devices parameters and temperature behaviour on gain characteristics of VGA, a bias circuit is adapted to a proposed gain control circuit. The gain range of 73dB, the gain error of within /spl plusmn/2dB, the NF of 5dB are obtained at 380MHz by measurement, and the maximum current consumption is 6 mA under a single 1.8V power supply.

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What this paper is about

A linear-in-dB VGA is fabricated in 0.18-/spl mu/m CMOS technology. It is composed of three cascaded VGAs. Each of them is based on a conventional VGA and a proposed gain control circuit. To avoid devices parameters and temperature behaviour on gain characteristics of VGA, a bias circuit is adapted to a proposed gain control circuit. The gain range of 73dB, the gain error of within /spl plusmn/2dB, the NF of 5dB are obtained at 380MHz by measurement, and the maximum current consumption is 6 mA under a single 1.8V power supply.

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OpenAlex reports 8 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

A linear-in-dB VGA is fabricated in 0.18-/spl mu/m CMOS technology. It is composed of three cascaded VGAs. Each of them is based on a conventional VGA and a proposed gain control circuit. To avoid devices parameters and temperature behaviour on gain characteristics of VGA, a bias circuit is adapted to a proposed gain control circuit. The gain range of 73dB, the gain error of within /spl plusmn/2dB, the NF of 5dB are obtained at 380MHz by measurement, and the maximum current consumption is 6 mA under a single 1.8V power supply.

Key concepts: Video Graphics Array, Variable-gain amplifier, Automatic gain control, CMOS, Open-loop gain, Amplifier, Dynamic range, Electrical engineering

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