地震勘探仪器中自动校零环路设计
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摘要
自动校零环路应用在地震勘探仪器的瞬时浮点放大器中,瞬时浮点放大器为脉冲放大器,用于对采样脉冲串依次放大。瞬时浮点放大器为直接耦合的多级放大器,如何抑制零点漂移是一个需要重点考虑的问题。自动校零环路的设计构想是采用两拍工作方式:在两个采样脉冲的间隔时间进行"零漂记忆",在放大器对采样脉冲进行放大处理时实现"零漂校正"。配合其它校零措施后,该设备零漂指标可达到小于0.25μV的水平。
The automatic offset correction loop is used in the instant float-point amplifier. As the pulse (amplifier), the instant float-point amplifier is used in amplifying the series of sampling pulse one by one. The design of the automatic zero-drift correction loop is based on the two-beat operating, which records a zero-drift within the interval between two samples and implements the zero-drift correction during (amplifying) the sample pulse by an amplifier. After applying other zero point offset corrections, the zero point offset of this equipment can reach the level of less than 0.25 μV.
引文
[1]孙肖子,张企民.模拟电子技术基础[M].西安:西安电子科技大学出版社,2001.
    [2]傅丰林,陈健,陈梅.电子线路基础[M].西安:西安电子科技大学出版社,2001.
    [3]《数字地震仪》编写组.数字地震仪[M].北京:石油工业出版社,1979.
    [4]尤桃如.SN338数字地震仪的操作、调试与维修[M].北京:地址出版社,1986.
    [5]李清泉,黄昌宁.集成运算放大器原理与应用[M].北京:科学出版社,1980.

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