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放大器是测震仪的一个关键部件,它由前置放大和功率放大两级组成.前置放大主要担负放大由拾震器输出的微弱地动信号是电压放大。功率放大主要是输出功率,即将放大了的信号转换为功率输出去推动记录笔记录出与地动位移成正比例的地震波形。因记录笔是线性记录笔,而拾震器输出的地震信号则是微分信号。为了实现将微分信号变为线性信号以适合于线性记录笔记录波形,所以要求放大器必须是积分式型的放大器。
Amplifier is a key component of the seismometer, which consists of preamplifier and power amplifier. Preamplifier mainly responsible for amplifying the weakly moving signal output by the pickup is voltage amplification. Power amplification is mainly the output power, the signal is about to be amplified into a power output to promote the recording pen to record and ground motion displacement is proportional to the seismic waveform. Because the stylus pen is a linear stylus, the seismic signal output by the pickup is a differential signal. In order to change the differential signal into a linear signal suitable for linear recording pen recording waveform, it is required that the amplifier must be an integral type of amplifier.