Sallen-Key Filter Design Tutorial: LPF, HPF Frequency Response, Damping Factor

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An overview of How to Design Sallen-Key Analog Filter is presented in this Tutorial and Walkthrough circuit design video for both Low-Pass Filter and High-Pass Filter Implementations. This Filter is designed with operational amplifier and two pairs of resistors and capacitors. For more Analog Filters and Circuits examples please see • Electrical Engineering...
The general Sallen Key Topology is discussed and then Transfer Function is computed using a combination of op amp virtual short, Kirchhoff Circuit laws KCL (law of conservation of current) and KVL (voltage division) and unity gain buffer (non-inverting amplifier). The Transfer function of LPF and HPF filters are compared and then using MATLAB Freqs, pzmap and step functions, Sallen-Key Filter frequency response, phase response, pole-zero map plot, time domain step response, Natural frequency and Damping factor zeta are evaluated, compared and analyzed to examine underdamped, critically-damped and overdamped design cases.

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13 сен 2024

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Комментарии : 19

@stevekoehn1675 9 месяцев назад

Wonderful. So helpful for an old guy learning on his own. You have brought it all together

@STEMprof 9 месяцев назад

Thanks for watching. Glad that you liked this Sallen-Key Filter Overview. Happy to hear that this Tutorial is helpful. For more Op Amp Circuit and Analog Filter examples please see Analog Circuits video collection: ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope these Circuit design and analysis videos are helpful. 🙋‍♂

@STEMprof 8 месяцев назад

You are very welcome. I hope you also like the recently posted video Push-Pull Power Amplifier Design with Op Amp, Sziklai Darlington Transistors ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8BFzsi7-Vbs.html

@voice4voicelessKrzysiek 9 месяцев назад

Thank you for this analysis.

@STEMprof 9 месяцев назад

You are welcome. Thanks for watching. Glad that this Sallen Key Filter Design Tutorial is useful. I will post more examples in the Analog Circuit video collection ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt Thanks again 🙋‍♂

@STEMprof 9 месяцев назад

Thanks for watching. For more Op Amp Circuit and Analog Filter examples please see: Butterworth Analog Filter Design with Op Amp ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SIMg5TOIgrA.html Band-Pass Sallen-Key Filter Design ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-lsM09pcrRVE.html Op Amp Analog Computer Differential Equation Solver ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ENq39EesfPw.html Universal Analog Filter Design ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2J-0msXZE2o.html Laplace Transform Example and S-domain circuit analysis: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ps8N5TPM_qU.html Op Amp circuit Bode Frequency plot ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BLVzuuqAlZs.html Bode Plot, Frequency Response, Transfer Function ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vZFkPeDa1H8.html Analog Logarithm Computer ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RpKEq5WyoLg.html Lowpass Butterworth Filter: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UzCjkwqy-9w.html Analog Computer to Raise Signal to power n ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IUTlBH1UraE.html Triangle Oscillator Op Amp circuit ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-JF5Up_cuL9k.html Push-Pull Power Amplifier with Darlington Transistors ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-866MYibo8yE.html Differential Equation Solver Analog Circuit ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-R3X5AYNZGEI.html Complex Sinusoid Oscillator ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GXRhmwmS5Zk.html Sawtooth Oscillator Design ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2eUsGPfqbW4.html Full-Wave Rectifier circuit example ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DJJMNU-CYcg.html Sawtooth Waveform Generator design with OpAmp, JFET, BJT ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5zHXTx-Vl20.html op amps Circuit with feedback loops to design an analog computer that solves a second order differential equation ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-HeZRtnRXpEI.html For more analog circuits and signal processing examples see: ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope these Circuit design and analysis videos are helpful. 🙋‍♂

@Chupacabras222 8 месяцев назад

Very nice explanation.

@STEMprof 8 месяцев назад

Thanks for watching & your comment. Glad that this Sallen-Key Tutorial is useful. For more Op Amp Circuit and Analog Filter examples please see: Universal Analog Filter Design ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2J-0msXZE2o.html Analog Logarithm Computer ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RpKEq5WyoLg.html Bode Plot, Frequency Response, Transfer Function ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vZFkPeDa1H8.html Laplace Transform Example and S-domain circuit analysis: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ps8N5TPM_qU.html Lowpass Butterworth Filter: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UzCjkwqy-9w.html Op Amp Analog Computer Differential Equation Solver ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ENq39EesfPw.html Analog Circuits video collection: ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope these Circuit design videos are interesting. 🙋‍♂

@frunsebischkek1050 9 месяцев назад

Very useful channel for an engineer! Many thanks! Would it make the derivation easier using star-delta formula for R1, R2, C1? BTW do you know a analog circuit, that behaves like a precision voltage controlled z-diode (0...15V)? Fast and stable would be nice.

@STEMprof 9 месяцев назад

Thanks for watching, your interest & good questions. Glad that this channel is useful. For this relatively small op amp circuit, given the already quick KCL calculation utilizing Op Amp virtual short, Star-Delta transformation is probably not beneficial. But it might help in a larger circuit. Regarding your voltage controlled Zenner Diode question: effectively you are asking for an adjustable voltage regulator. Please see this example: Voltage Regulator design with Op Amp BJT JFET and Zener Diodes ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CJl-urzeiTo.html I hope this is helpful.

@frunsebischkek1050 9 месяцев назад

@@STEMprof Thank you. Very interesting.

@STEMprof 9 месяцев назад

You're welcome. Glad that you liked the video. For more examples pls see my Analog & Electronics videos collection: ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt Thanks for watching. 🙋‍♂

@waferlayout 8 месяцев назад

Thanks

@STEMprof 8 месяцев назад

You are welcome. Thanks for watching. Glad that this Sallen Key Filter Design Tutorial is helpful. I will post more examples in the Analog Circuit video collection ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt Thanks for watching 🙋‍♂

@waferlayout 8 месяцев назад

@@STEMprof thanks again 🫡

@stroudcuster4483 9 месяцев назад

What do M and N represent?

@STEMprof 9 месяцев назад

Thanks for watching & your good question. In this Sallen-Key Design Tutorial video, parameters M and N are real positive numbers that the designer can choose depending on what Damping Factor and Frequency Response (for example cutoff frequency) are desired. The impact of M and N on Filter characteristics are discussed in the second half of this video that shows time-domain step response and Sallen-Key Frequency response as we change M and N. I hope this explanation is helpful. For more Op Amp Circuit and Analog Filter examples please see: Bode Plot, Frequency Response, Transfer Function ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vZFkPeDa1H8.html Universal Analog Filter Design ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2J-0msXZE2o.html Analog Logarithm Computer with BJT & OpAmp ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RpKEq5WyoLg.html Laplace Transform Example and S-domain circuit analysis: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ps8N5TPM_qU.html Lowpass Butterworth Filter: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UzCjkwqy-9w.html Op Amp Analog Computer Differential Equation Solver ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ENq39EesfPw.html Analog Circuits video collection: ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope this explanation and these Circuit videos are helpful. 🙋‍♂

@bullworth1123 9 месяцев назад

Thanks a lot

@STEMprof 9 месяцев назад

You're welcome. Thanks for watching. For more Op Amp Circuit and Analog Filter examples please see: Bode Plot, Frequency Response, Transfer Function ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vZFkPeDa1H8.html Universal Analog Filter Design ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2J-0msXZE2o.html Analog Logarithm Computer ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RpKEq5WyoLg.html Laplace Transform Example and S-domain circuit analysis: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ps8N5TPM_qU.html Lowpass Butterworth Filter: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UzCjkwqy-9w.html Op Amp Analog Computer Differential Equation Solver ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ENq39EesfPw.html Analog Circuits video collection: ru-vid.com/group/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope these Circuit design and analysis videos are helpful. 🙋‍♂