The intensity of a pulse emitting laser can be controlled constantly and continuously while recording data without using test emissions or a high speed sample hold circuit.
对在记录数据时处于脉冲发光状态的激光，不用试验发光或高速抽样保持电路，就能经常连续地控制其强度。
On the basis of analyzing the common methods of background magnetic field compensation, a new automatic compensation method based on sample and hold circuit is put forward.
在分析磁通门常用背景磁场补偿方法基础上，提出一种新的采样保持电路自动补偿方法。
Sample the negative voltage on the diode series with IGBT by Peak hold switch circuit, and cut-in A/D module in the DSP, compared with setting value.
通过电压峰值采样保持电路对IGBT串联二极管反压值进行采样，后经DSP A/D转换模块与反压设定值进行比较。
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