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目前,我国的模拟地震记录仪放大器只能工作于固定的放大倍数状态.稍为大些的地震发生便会出现“出格”现象,应用这些记录难以确定地震的震级,震中等参数.为了解决这一问题,我们设计了一种可以自动换挡的地震仪放大器.在通常的情况下,放大器工作于高放大倍数状态,一旦发生较大地震,放大器会自动衰减20dB,并保证记录的波形不会发生畸变.这一放大器全部由IC构成,放大器的各项参数指标比以前的放大器有较大的提高.
At present, the simulated seismic recorder amplifiers in our country can only work at a fixed magnification state, and the slightly larger earthquakes will appear “out of order” phenomenon, so it is difficult to determine the earthquake magnitude, epicenter and other parameters using these records. Problem, we designed a seismograph amplifier that can automatically shift. Under normal circumstances, the amplifier work in high magnification state, in the event of a large earthquake, the amplifier will automatically decay 20dB, and ensure that the recorded waveform does not occur Distortion. The amplifier is composed of all ICs, the amplifier parameters of the indicators than the previous amplifier has greatly improved.