On condition that the open-loop parameters are given, the loop filter of feedback seismometer with a velocity transducer is one of the key factors of effecting seismometer main technical performances.

在开环参数一定的条件下，速度传感反馈地震计中的环路滤波是影响地震计主要技术指标的关键环节之一。

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This paper gives a particular introduction about comparing circuit, and presents the reasons why the open-loop comparing circuit could not operate stably in a condition full of high-speed noise.

本文详细介绍了比较电路工作特点，分析了开环比较电路在高频噪声干扰环境中不稳定工作的原因。

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The open-loop feedback portion of this circuit lets the microcontroller know that a fault condition exists on the line.

电路的开关反馈部分使微处理器分辨线路中存在的错误条件。

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