1.引言毫米波宽频带、高速、线性调频vco是频率捷变雷达、侦察接收、扫频干扰、精确测速、测距、精确主动制导设备中关键性部件,通常变容管电调vco线性度难以满足要求,无法直接用于系统,采用线性校正电路可能解决这一难题。目前线性校正电路分两种:开环电路和闭环电路,开环电路又分对数校正法、折线校正法和DTO法(数字校正法)。 1. Introduction millimeter-wave broadband, high-speed, chirp vco is a frequency agile radar, reconnaissance receiver, sweep interference, accurate speed, ranging, accurate active guidance equipment key components, usually varactor vco linearity Difficult to meet the requirements, can not be used directly in the system, the use of linear correction circuit may solve this problem. At present, there are two kinds of linear correction circuits: open-loop circuits and closed-loop circuits, and open-loop circuits are divided into logarithmic correction method, polyline correction method and DTO method (digital correction method).