Abstract:On the basis of analysing the principle and circuit of instantaneous floating-point amplifier (IFP amplifier) in DFS-V seismic system, we developed a set of mathematic models for quantitative analysis of IFP amplifier, and designed the program for computing and plotting The amplitude characteristic curves were computed and plotted on DUAL-6800 icrocomputer by making use of the original parameters of DFS-V seismic system. The computation result shows that this system can effectively restrain the overflow distortion caused by zero-passage dipping-top sample to make high fidelity transmission of seismic signals, but its measurement accuracy is on the low side.In order to overcome the demerit, we changed the original parameters of IFP amplifier circuit and made a great deal of sweep computation, so that we found these ideal new parameters: prediction (c)=3μs, upper reference level(V)=6.8V and 7.2V, lower reference level(V) =1.6V and 1.7V. As a result, no overflow distortion occurs, furthermore IFP amplifier shows much higher measurement accuracy than before,these favour the ameliorating of seismic signals.
收稿日期: 1987-04-22
引用本文:
黄先律, 杨文泽, 丁燕云, 冯淇. DFS—V仪器瞬时浮点放大器的定量分析[J]. 石油地球物理勘探, 1988, 23(2): 219-226.
Huang Xianlu. The quantitative analysis of instantaneous floating-point amplifier in DFS-V seismic system. OGP, 1988, 23(2): 219-226.