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Transfer function for Twin-T circuit for notch filter -- choosing component...
A notch filter is a system with transfer function$$H(s) = \frac{s^2 + \omega_0^2}{s^2+ 2\omega_0\cos(\theta)s + \omega_0^2}$$In "math form", this transfer function can be written as$$ H(s) = \frac{s^2...
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How to "approximately" get the transfer function for a two-stage op-amp circuit?
One way to solve the above circuit is to write KCL equations and solve, but it is too lengthy. Another way is to look at the circuit for high frequency and low frequency and find the poles and zeros...
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Transfer Function of multiple feedback bandpass filter (with Vcm at positive...
How to calc bpf 1 transfer function? all questions I see on net have gnd at non-inv term. but here it is Vcm because of which constant term coming. how to get Vo/Vi?
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How can I continue to reduce this block diagram to a single-circuit diagram?
What I’ve done so farCombined W₁ and Wₓ into an equivalent block W₁ₓ (second image).Moved the summing junction, then combined W₁ₓ in series with W₂ to form W₁ₓ·₂, combined (1/W₁ₓ) in series with W₄ to...
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Transfer function of a Voltage-Fed PCM-controlled Push-Pull converter in CCM...
I am designing a Voltage-Fed Push-Pull converter, and I would like to determine the system's transfer function in both CCM and DCM modes. The control will be in Peak Current Mode. I am reading through...
View ArticleFor what reasons could my embedded controller's sample time have been too long?
Sorry if this isn't quite the place to ask such a specific control-engineering-oriented question. I'm trying to speed-control a brushed DC motor after doing some manual identification from a...
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Peak current mode control boost converter using a current sense transform
I'm currently working on a peak current mode control boost converter. I recently joined the company that originally designed it, and I'm using a UCC28C43D controller.As I review the schematics, I've...
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LLC Converter AC Analysis in LTspice
Can you help me? I want to plot the transfer function G(s) = Vout(s)/w(s), where Vout is the output voltage of the LLC converter and w is the switching frequency of the transistors.In the LTspice...
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Does this analysis of the system in terms of Nyquist makes sense?
I have the following system where \$K,K_t\$ are both positive.I find the Open Loop Transfer Function (OLTF), which is:$$L\left(s\right)=\frac{K_{t}s+K}{s^{2}\left(s+2\right)}$$Now to start the...
View Articletransfer function pols
i am third year Electrical engineering student, i have some issues that i could not find a good explanation for it. lets say we have an RC circuit (low pass configuration). if we calculate the transfer...
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Can't draw bode curve of this zero
I have a transfer function like this:\$H(s)=\frac{s^2+\frac{1}{LC}}{s^2+s\frac{R}{L}+\frac{1}{LC}}\$I can separate the denominator into an expression of the type: \$(1+s/a)(1+s/b)\$ and then plot these...
View ArticleWhat does the real axis of a transfer function mean?
Let's say I have a system that has a transfer function \$ H(s) \$. Now \$ s = \sigma + j \omega \$, so \$ H(s) = H(\sigma + j \omega) \$. If I am not mistaken, the imaginary axis \$ j \omega \$...
View ArticleHow to determine the design point while designing a controller for a given Plant
So I'm studying for my exam and doing previous year papers, and a lot of the time I come across questions where the damping ratio will be given to me to design a specific controller(PI or PD), and then...
View ArticleAllowable process variation for non minimum phase plant
Scenario (plant model subject to process variations)Consider a plant \$P(s)\$ in series with a controller \$D(s)\$ with a negative feedback path around it, where the closed loop is given by the...
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Controlling current through a RL load using Triac firing angle
I want to control the amount of current going through a Triac by adjusting the firing angle accordingly. The Circuit is shown below:Let's say i want IRMS to be 0.28A then the controller need to change...
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How can I measure the transfer function of a push-pull converter in SIMPLIS?
I’m designing a push-pull converter with current mode control. I’ve already drawn the power supply in SIMPLIS, the only thing missing is the feedback network. My problem is that since I don’t know the...
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How to compute the transfer function of this op-amp circuit?
I'm trying to compute the transfer function of the circuit shown in the image.I've already calculated the impedance of the feedback network Zf(s), and I'm reasonably confident it's correct.Zf(s) = (...
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Find transfer function and conditions to stability
I have this circuitin which I need to find the transfer funcion and the stability conditions. I first got confused because I only say the transfer function as Vo/Vi, not as Il/Vi as asked in the...
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Finding transfer function of a compensator circuit similar to a type 2...
I know how to find transfer functions of op-amp circuits using equations derived from using Kirchhoff's current law (nodal analysis), and normally I don't have any problems solving them. However, I...
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Using the Extra Element Theorem on Bandpass Filter
Below is a bandpass filter which I want to use in a RF circuit and I wanted to design it using the extra element theorem. Below shows my attempt to find the transfer function of the input impedance of...
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Modelling positive feedback through capacitance to a guarded node driven by...
On my circuit I am protecting a sensitive node with a guard op amp. However, since the op amp has limited bandwidth, at higher frequency there will be feedback through capacitance between the guard and...
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Calculate Opamp transfer function
I am trying to figure out how to calculate the transfer function of this OpAmp circuit, where all the resistors are 10k Ohms. I'm not sure if my method solving it is correct and would appreciate any help.
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Deriving 2nd order passive low pass filter cutoff frequency
I'm working on a 2nd order passive low pass filter, consisting of two passive low pass filters chained together.simulate this circuit– Schematic created using CircuitLabLet \$ H(s) = H_1(s)H_2(s) \$...
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How to know that the result of my ac analysis of LLC converter is accurate?
I'm doing the ac analysis of an open loop llc converter in Simplis using the templates "LLC VM demo" from here provided by Verbal Kint.How do I know that the result of my ac analysis of the LLC...
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Deriving Transfer Function of General First-Order Filter
From Alexander Sadiku's Fundamentals of Electric Circuits, Problem 14.66:I am asked to derive the transfer function for the general first-order filter below:I redrew a simplified schematic:I used...
View ArticleRepresentation of Photovoltaic cell and BESS in Microgrid by first order...
I am working in the are of frequency control of Microgrid and have come across many publications (For example: https://www.sciencedirect.com/science/article/abs/pii/S0142061515005220 (Pg 3,5)), wherein...
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CMC Buck converter compensating inductive load
I am designing a digitally controlled peak current mode controlled buck converter which can work in constant-voltage (CV) or constant-current (CC) mode. One operating point of the converter is...
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Could this system become unstable when operating in DCM mode?
I’ve designed a 12V-to-360V push-pull converter that will operate in both CCM and DCM modes.In CCM mode, the system’s transfer function is completely fine, but I have some concerns about DCM.When...
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ADuM3190 Transfer Function
The ADuM3190 seems like a good alternative to the TL431+opto solution. However, I would need to know its complete transfer function for proper use. The datasheet doesn’t explicitly include this, but...
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Bode Plots of magnitude and phase [closed]
Draw the bode plots of magnitude and phase of the transfer function
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