seismic amplifier;人工地震引起的地面位移,一般只有几微米,经地震检波器转换为电能后也只有几微伏。要把这种微弱电信号记录下来,必须进行放大。为此制作的装置叫做“地震放大器”。由于地震波包括有效波和干扰波,有效波中的浅层波与深层波之间的振幅相差达一百万倍以上,所以,地震放大器必须具有滤除干扰和增益(放大)控制的作用。
瞬时浮点放大器是数字地震仪中的关键部件。
Instantaneous floating point amplifier is a key unit in digital seismic system.
ARA的性能比分立元件组成的各类现用地震仪放大器性能有较大的提高。
Its performance score shows that the character of every kind of seismic amplifier which composed by the parts of ara has increased greatly.
鉴于测震中电子放大地震仪放大器的输出动态范围窄的缺陷,笔者作了自动换档衰减放大倍数的电路技术设计。
For overcoming the shortcoming of narrow output dynamic range of the electronic-amplifying seismograph, the Authors have designed a kind of circuit for automatic gain control.
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