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英国Sensonics公司生产的DTR—700型磁带记录地震仪与我国通用的电子放大地震仪器相比有一个不同点,就是拾震器的阻尼是由放大器对拾震器的反馈电流所提供的,即拾震器具有所谓“反馈阻尼”(Feedback Damping)。具有反馈阻尼的拾震器,其阻尼的调节不是象一般地震仪那样,通过改变拾震器和放大器之间网络电阻的阻值来进行,而是通过反馈电流大小的控制来进行。这种接法的好处是最大限度地利用了换能器的输出(因为没有信号消耗在阻尼匹配网络电阻上),增加了换能器的工作稳定性。过去我们的地震仪
The difference between the DTR-700 tape recorder seismometer produced by Sensonics in the United Kingdom and the common electronic magnification seismic equipment in our country is that the damping of the pickup is provided by the amplifier’s feedback current of the pickup, that is, The vibrator has a so-called Feedback Damping. The feedback damping damping sensor, the damping adjustment is not like the general seismometer, by changing the resistance between the pickup and the amplifier network resistance to carry out, but through the size of the feedback current control. The benefits of this connection are to maximize the transducer output (as no signal is consumed on the damped matching network resistor), increasing the operational stability of the transducer. Past seismographs