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精密基准电压源ＬＭ３９９系列是迄今为止同类产品中温度系数最低的器件，内部有恒温电路，可保证器件的长期稳定性。本文主要介绍了该系列基准电压源的结构原理和性能特点，并简要说明了应用方法
Precision Reference The LM399 series is by far the lowest temperature coefficient device in its class and has a constant temperature circuit inside to ensure the long-term stability of the device. This article describes the structure of the series of reference voltage source and performance characteristics, and briefly describes the application method