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Transimpedance amplifier with parallel RC
Consider this circuit.Since a constant current source is present, the output voltage will always be $$V_o=i_sR_f$$However, you can also drive $$i_s=i_c+i_R=C\frac{dv_c}{dt}+v_c/R$$Then you can say that...
View ArticlePower converter: Why is audio susceptibility named so?
In power converter, audio susceptibility refers to line-to-output transfer function. ( Line= Input voltage ) [ Ref : Fundamentals of Power electronics: Erickson ]Why is it named so-...
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Find a model with transfer function and real data
I am currently trying to create a model using a transfer function and my data. Here is my schematic:Here is my transfer function:My input signal is 2.5V for 10s, after which I decrease the voltage to...
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Second-order RLC transfer function
I solved the exercise in the picture with Laplace:Not being familiar with systems theory yet, I do not understand one thing (circled in pink in the picture.)The transfer function found with the black...
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Consider the following circuit system (RLC Circuit, R and L parallel then...
i'm trying to figure this out, but i'm still confused. Can anyone help me? Thank youThis is what i've done. Am i in the correct path?
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Transfer Function from Charge to Voltage
I have this circuit I am working on for a personal project with a piezoelectric sensor. It’s essentially a charge amplifier with some extra features. I’m trying to work through the math to get a...
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Complex Block Diagram Reduction
I have this Block Diagram and I need to simply it. But I'm still confused and this is my progress currently. I don't know is this correct or not. Maybe someone can help me.
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Understanding the gain in an RC circuit's transfer function
I am learning about 1st order transfer functions, and I am trying to understand it with practical examples of systems, because it still looks weird to me how a same function can describe various...
View ArticleHAL USB device library transfer complete callback (USB MIDI adaption)
I have been able to implement Zac Rogers USB MIDI adaptation of the Cube MX USB device middleware:https://github.com/zacrogers/blue_usb_midiI can send USB midi messages on both F103 and F411. It seems...
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Constructing Transfer Function (using voltage divider twice)
I have been trying to find the transfer function for this circuit, and I think I may have to use the voltage divider twice.What I have tried:I have used the voltage divider formula to find the Voltage...
View ArticleSecond-order Butterworth gain calculation at cut-off frequency
The Butterworth second-order low-pass filter has the following transfer function:$$\frac{\omega_c^2}{s^2+\sqrt2s\omega_c+\omega_c^2}$$We know that at \$s=\omega_c\$, the filter's attenuation is -3 dB,...
View ArticleThe center and radius of root locus
With this opened-loop transfer function,$$ \begin{align*} L(s) & = \dfrac{K(s+2)}{s(s+1)} \end{align*}$$I would like to plot the root locus of this system. Based on the textbook, I got the...
View ArticleHow to separate 4th order transfer function (Butterworth Approximation) into...
Previously I had the following coefficients in the program. In this program I want to create a transfer function of butterworth approximation (Digital Filter Design - Digital Signal Processing).import...
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Finding the K value for minimum damping coefficient
I have a block diagram,From the diagram, I think the two summing points at the middle of the diagram can be switched, therefore, I got open and close loop transfer function as below:$$ \begin{align*}...
View ArticleBreak away/Break in angle in Root Locus method
We are learning Root Locus in our introductory controls course, and one thing has really been confusing me.When the poles are on real axis, is the breakaway angle always 90 degrees? Is there a simple...
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Finding transfer function of high-pass circuit
I've already done the calculations myself, but I am getting a completely wrong answer for the poles and zeros. I'm not sure what I am doing wrong. If someone could point out my mistake please I would...
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Determining Transfer Function from Block Diagram
I'm doing my homework and need to find a transfer function W_eg (from input g to output e) using given block diagram.The problem is that the output e disappeared.I made a step by step solution how I...
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How to determine the transfer function of this pi filter?
I have this pi filter, I wonder how do i determine the dynamic model and the transfer function of this filter?
View ArticleNichols plot confusion
The transfer function is \$F(p)=10/(p^2+2p+1).\$Using Wolfram Alpha, the Nichols plot shows that the argument \$\to -\pi\$ when \$\omega \to +\infty\$.However, calculating the argument on paper...
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Calculate the transfer function of an OPAMP circuit [closed]
I have an OPAMP circuit that its output increase steadily without cahnge in the input. I guess the issue is in the transfer function of the circuit and its stability.I want to calculate the transfer...
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RLC bandpass filter transfer function
I've been tasked with finding the transfer function of the RLC filter shown below. I converted to the S-domain and used the voltage divider rule to find the output, and came up with:$$H(s) =...
View ArticleWhat is minimum gain crossover frequency in bode analysis?
I know gain crossover frequency at which magnitude of open loop transfer function is 0. But what is the case here for minimum Wgc?
View ArticleDetermine the transfer function for the Butterworth bandpass filter? (At the...
The Parameter$$a_{pass} = - 1dB$$$$a_{stop} = - 20dB$$$$f_{pass1} = 10kHz$$$$f_{pass2} = 30kHz$$$$f_{stop1} = 5kHz$$$$f_{stop2} = 60kHz$$A. Approximate Low Pass FilterFilter Ordo$$n_B = 4.29$$$$n_B = 5...
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How to find transfer function from a graph
I need help to find the transfer function of the system from this input/output graph:
View ArticleBreak in and break away point
Consider the open loop transfer function of \$\frac K{s^3+2s^2+2s}\$.In a negative feedback system, that has three poles \$0, -1+i ,-1-i\$.Is there any break-in or break-away point because only one...
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Transfer function mesh analysis
I am stuck with this problem. I simplified my answers using Mathway, and the answer in the book is different. Any help will be appreciated.My solution:I also don't understand how the book is able to...
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What exactly changes at closed loop transfer function, when circuit move from...
I have hard time to understand what exactly changes in close loop transfer function when it goes from ccm to dcm.When we close loop, blocks which signals goes through are:A(s) LC post filter with load...
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Passive filter design from transfer function
I would like to implement a passive RIAA filter circuit. This is the bode plot of a RIAA equalizer.The transfer function of this:H(jw) = (jwT1 + 1)/[(jwT2 + 1)(jwT3 + 1)] where time constants are...
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Analog Compensator Vs digital Compensator in Power electronics Converter
I was working on designing a feedback compensator for my buck converter. I decided to use the compensator circuit in the feedback and give its output to Arduino which gives the duty cycle as shown...
View ArticleFinding coefficients for a PID controller that minimize the integral of the...
The problemThe problem is to find the coefficients for the P, I and D terms of a PID controller used to regulate the object that minimize the the integral of the squared error (ISE):$$Q = \int_0^\infty...
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