【摘要】 介绍了磁调制式直流放大器的构成，围绕提高磁调制器的性能进行了讨论，给出调制器的灵敏度与其结构尺寸及信号绕组匝数之间的关系，并确定了获得最高灵敏度应满足的条件。根据减小噪声和漂移、提高灵敏度的要求，分析了磁调制器铁芯应采用的结构型式。更多还原

【Abstract】 This paper introduces the composition of the DC amplifier using a magnetic modulator in order to improve the property of the modulator,a discussion is held about the relation of its sensitivity to its size and its signalwinding,thus establishing the condition for obtaining maximum sensitivity. The structure of the modulator used is alsoanalyzed,with an aim to improve its sensitivity,and to reduce noise and drift.更多还原