介绍锁相环 (PLL)电压 -频率 -窄脉冲转换原理及其微功耗机制 ,并结合集成锁相环路特性及其随环境温度的变化 ,提出了优化锁相环线性度的方案和改善频率 -温度特性的温度补偿电路。该电路已应用于光纤光推动高压电流传感器的测量探头中 ,其功耗小于 0 .3mW。 This paper introduces the principle of voltage-frequency-narrow pulse conversion (PLL) and its micro-power mechanism. Combined with the characteristics of an integrated PLL and its variation with the ambient temperature, this paper presents a scheme and improvement to optimize the linearity of the PLL Frequency - temperature characteristics of the temperature compensation circuit. The circuit has been used in optical fiber push high-voltage current sensor measurement probe, the power consumption is less than 0 .3mW.