Analysis of 1/f Noise Generated by Operational Amplifiers in Nonclassical Light Fields
As nonclassical light fields develop,operational amplifiers measurements should be as accurate as possible during their measurements.In order to solve the above problem,an operational amplifier for nonclassical optical field detection of optical signals was used to compare the slew rate of the operational amplifiers and the maximum swing rate of the input signal to explore when dis-tortion-free transmission is possible.The results show that when the slew rate of the operational amplifiers is too low and less than the maximum swing rate of white noise,1/f noise is observed at the output.As the slew rate of the operational amplifiers decreases from 5 V/μs to 0.01 V/μs,the slope of 1/f noise can be calculated from 0.439 6 to 0.967 4 by using the least squares method of wave-let analysis,and the system performance is gradually decreasing.When the slew rate of the operational amplifiers is too low,it in-creases system noise under the condition of large dynamic signals.
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