一种低噪声高增益宽带视频对数放大器

A Low-Noise High-Gain Wide-Band Logarithmic Amplifier

着重介绍了一种用于电子对抗系统（ＥＣＭ）预警雷达接收机中的低噪声高增益宽带视频对数放大器的设计原理、制造工艺及其应用，进一步考察了国内外整机系统的发展现状，综合介绍了目前国内外视频对数放大器（ＬＶＡ）的发展及其在整机系统中的应用前景。

A low-noise,high-gain,wide-band video logarithmic amplifier is presented.The de-sign considerations and fabrication process are described.The worldwide development of logarith-mic video amplifiers and their application prospect are revievved.