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Convenient And Simple High-Pass Filter (Differentiator) Circ

2017-02-17 21:53  
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Convenient And Simple High-Pass Filter (Differentiator) Circuit
The picture shows the convenient and simple high-pass filter (differentiator) circuit. This circuit is high-pass filter and also could be used as pulse differentiator. The relations between output voltage Ua and input voltage Ue is:Ua=-R1C1(d/dt)Uc.The output voltage's variation value is about 12dB/octave. The frequency point could be determined by the two formulas (picture b).fa=1/2πR1C1=1/2πR2C2, fb=1/2πR2C1.The resistor R3's value is equal with R2's value.