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Design of a wide dynamic range and high-speed logarithmic amplifier  

Park, Ki-Won (Dongguk University, Department of semiconductor)
Song, Min-Kyu (Dongguk University, Department of semiconductor)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.39, no.7, 2002 , pp. 97-103 More about this Journal
Abstract
In this paper, a Logarithmic Video Amplifier(LVA) for radar system or satellite communications is described. The proposed LVA is composed of a input stage, amplification stage, and output stage. As well as a novel series-parallel architecture is proposed for the purpose of wide dynamic range and high speed operation, a newly developed input stage is designed in order to control the voltage level between LVA and detector diode. The LVA is fabricated with a 1.5um 2-poly 2-metal n-well Bi-CMOS technology, and the chip area is 1310 um x 1540 um. From the experimental results, it consumes 190 mW at 10V power supply, the chip has 60 dB dynamic range and 100ns falling time.
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