Volume 1
The Analysis of Output Operating Amplifier Case
By Albertus Endry P
Figure 1: Op-amp circuit
Figure 2: The result of 3 points on op-amp circuit, on A, B and C point.
Parameters:
A is input waveform from generator.
B is output waveform from op-amp.
C is charging capacitor waveform.
How to read the waveform?
The waveform is shown above; illustrate that the output amplitude is following at the capacitor charging. It’s happen since capacitor energy used for op-amp activation. Time remaining to charging capacitor is full about 450mS. After it the output capacitor will be working properly.
Figure 3: One period of total op-amp working about 125.0mS.
The peak of op-amp output never crossing the maximum output of capacitor. Though the op-amp theoretical said that “the gain of op-amp is not limited” but practically the op-amp characteristic is determine by voltage is op-amp used.
Case of study
Now any problem I give to you. Please perceive careful of the picture below.
Figure 4: The case for analysis
The question
1. What the amplitude of the input signal? Why the input waveform is crossing the capacitor waveform? What happen is to do? And what do you want to do for it?
2. When the output op-amp will be inverting to input?
3. Why the peak of output is never been sine?
4. What are you doing if I want the output op-amp is perfect sine?
Please send your comment and analysis to my email at
The one is the answer right will be my member of secret research.
*) the schematic diagram op-amp above is original research by Albertus Endry. If you want to get it for your literature please attach the original source.
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