电压参考:基于LM399的10 V15 V亚ppm稳定参考-源码

上传者: 42138788 | 上传时间: 2021-04-06 19:55:11 | 文件大小: 6.43MB | 文件类型: ZIP
LM399亚ppm参考电压 该存储库包含用于我们的激光驱动器的亚ppm温度系数负电压基准的KiCAD PCB项目文件。 关于 根文件夹包含KiCAD文件和材料明细表,而gerber文件位于文件夹中。 电路说明 该电路利用出色的LM399基准电压源,可输出-10 V或-15 V的放大电压。由于绝对值并不重要,因此稳定度至关重要,因此无法调整输出电压。 输出电压将比齐纳正电压低10 V / 15V。 该设计是一个自偏置电路,这意味着齐纳二极管偏置电流是由齐纳电压产生的,因此与基准电压一样稳定(忽略了偏置电流对齐纳电压的影响,可以忽略不计)。 为了使齐纳电流尽可能低,选择了略大于1 mA的齐纳电流。 选择电阻值的参考表: 电压 R1 RN1 -10伏 3k 10k / 9k -15伏 7.89千 17k / 20k 也可以使用不同的值,但是可以在Ebay / Farnell /

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