Clik here to view.
Finding the transfer function of this circuit
I’ve been working on finding the transfer function for this circuit and tried the following:Used KCL at nodes Va and Vb, incorporating the resistors and capacitors, but got stuck with the middle 2C...
View ArticleClik here to view.
Compute loop-gain analysis with Extra Element Theorem (EET)
I was trying to understand the following journal article about how to analyze loop-gain using design-oriented analysis.First, I can now derive the loop-gain expression neglecting load impedance and...
View ArticleClik here to view.
Analysis of the circuit and transfer characteristic
In order to analyze how the circuit works, we need to use the superposition principle because we have two sources and we need to make assumptions about when the diode \$D_1\$ is ON and when the diode...
View ArticleBessel filter: explicit calculus of the order of the filter
As it is well known Butterworth and Chebyshev filters have explicit ways of calculating the order, derived by its polynomials.For instance, for Butterworth filters:$$ n \geq \displaystyle...
View ArticleRelation between the input signal u and the error e
So I have the following excercise. Consider a simple feedback system with transferfunction \$G_1(s)=\frac{1.5}{s(s^2+2s+2)}\$. Determine the constants of the phase lag compensator...
View ArticleClik here to view.
Negative phase margin and misconception of the point of instability in...
PreludeConsider a canonical block diagram of a negative feedback loop with gain \$K\$, plant transfer function \$G(s)\$ and feedback transfer function \$H(s)\$: -Regardless of what functions K, G, and...
View ArticleClosed loop impedance of buck converter
I found it easy to workout the open loop input impedance and the open loop output impedance of a buck converter. But when it comes to the closed loop output impedance, it is hard to me. In some books...
View ArticleClik here to view.
Plotting a Bode from a Transfer Function on Matlab
I need a bode plot for a transfer function from matlab which I never did before. I tried some examples but failed. How to do this on matlab?Here is the TF:
View Articleflyback converter [closed]
I am tried to solve the transfer function of a simple flyback converter which is not gettingso, please give me the guidelines to solve the flyback converter transfer function which is useful to get a...
View ArticleClik here to view.
Transfer function for Twin-T circuit for notch filter -- choosing component...
A notch filter is a system with transfer function$$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...
View ArticleClik here to view.
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...
View ArticleLow Entropy derivation of Transfer Functions with OP AMPS
I was recently low entropy equations of passive filters, and came across the Extra Element Theorem and all of its uses.I was wondering if the there is something similar for OP AMP circuits/ Active...
View ArticleClik here to view.
Cascaded Voltage Divider
I have the following circuit:simulate this circuit– Schematic created using CircuitLabAt first glance, it looks like the expression for the voltage at V0 is the following:$$ V_0 =...
View ArticleClik here to view.
Delay and Stablity in Negative Feedback Systems: Confusion
Below is a block diagram that shows an op-amp in negative feedback with feedback network made from resistive divider:The encircled block is Op-Amp with 1 and 2 as its inverting and non-inverting pin...
View ArticleClik here to view.
3rd order filter - n Extra element theorem
I am trying to get the transfer function Vout/Vin of the following filter :For this, I applied the n-Extra Element Theorem . I order a book which seems to have more examples than the one I actually...
View ArticleClik here to view.
How to derive control-to-output transfer function of a valley switching PFC?
I post this question because of the comment from Verbal Kint in this question.The PFC is operated in CrM and the modulation is over on-time and valley number. There is a notch filter that reduces the...
View ArticleLC filter synthesis, given transfer function (by expressing driving point...
I want to know how to synthesise a passive LC circuit to implement an arbitrary known transfer function. (I understand that not all functions are suitable, so let's assume \$T(s)\$ is a positive real...
View ArticleCan a Positive feedback system become stable?
The Transfer function of the postive feedback system is this$$\frac{H(s)}{1-G(s)H(s)}$$If $$G(s)H(s)>>1$$The transfer function could be approximated to be $$\frac{1}{-G(s)}$$And if G(s) could be...
View ArticleClik here to view.
Modeling of the Transfer Function of a Single Active Bridge Converter
I´m designing a single active bridge converter.At this point, I'm trying to model the transfer function of this converter to implement the controller using a C2000 piccolo board. The point is I've...
View ArticleClik here to view.
Determining the Appropriate Method for Transfer Function Calculation [closed]
These are two questions. I checked the notes. Question 37 is solved using the gear ratio reflection method, where we reflect the gear ratio and add all impedances to solve. In question 39, they form...
View Article