一、前言对数视频放大电路技术,具有把大的输入动态范围瞬时压缩成小的输出动态范围的特性。因为它比自动增益控制(A、G、C)电路和灵敏度时间控制(S、T、C)电路具有更为优越的性能,因此,近年来得到了迅速的发展,并且广泛地应用于通讯、雷达接收机、遥感接收设备,激光接收机以及电子对抗装置、图象处理装置和各种放大设备中。 I. Introduction Logarithmic video amplifier circuit technology, with a large input dynamic range instantaneously compressed into a small output dynamic range characteristics. Because of its superior performance over the automatic gain control (A, G, C) circuits and the sensitivity time control (S, T, C) circuits, it has been rapidly developed in recent years and is widely used in communication, radar Receivers, telemetry receivers, laser receivers and electronic countermeasures, image processing devices and various amplification devices.