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Second order transfer function
I’ve been struggling with this circuit for over an hour. I’m trying to find the transfer function, can anyone help me with that?Here are my attempts on this:
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How to find the transfer function of a differential pair (BJT)?
I want to find the transfer function of a differential BJT pair. Like internally compensated op-amp can be assumed as a single pole system, is there any method to write the transfer function? I plotted...
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In this transfer function equation, is "20" inside the log() the value that...
In the given problem, we're supposed to find the gain of the transfer function. The solution provides an equation to the problem. The question I have is, for that particular equation, is the value...
View ArticleDoes every transfer function in a circuit have its own resonant frequency?
When I studied the resonant frequency of an RLC circuit in series and parallel, there was the definition that I read in books that the imaginary part of the total impedance of the circuit has to be...
View ArticleWhat is an "all pole source"?
For background I am not an engineer, and reading about linear predictive coding, so this question may be very trivial.I am trying to understand what a textbook means by referring to something as an...
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Finding deboos Integrator time constant and transfer function
I tried to determine the transfer function and time constant of deboo's non-inverting integrator. If I calculate with an ideal OP-AMP, then my calculation fails if the ratio of R2/R1 and R4/R3 is the...
View ArticleMaximum Power Transfer Theorem Question
I'm missing something here. The maximum power transfer theorem states that max power transfer from source to load happens when source impedance matches load impedance.In the case of a 10V source with...
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Transfer function for optocoupler
I read application report from Texas Instruments:Practical Feedback Loop Design Considerations for Flyback Converter Using UCC28740 (SLUAA66)There is a schematic (Figure 4. Optocoupler Frequency...
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Stability Criteria of Type 3 Digital PLL
I suppose we can derive the stability criteria based on poles of open-loop transfer function of F(z) in expression (4.11). However, the pole analysis does not help in deriving the stability criteria at...
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Input/output characteristics of opamp circuits involving diodes (fast peak...
I have these relatively simple circuits of which I need to find the transfer functions. Both circuits involve the use of an OpAmp and a diode after the output of the OpAmp. As an input I have a regular...
View ArticleHow to plot Nyquist plots?
By using the open loop transfer function for a control system, how would you then sketch the Nyquist plot by hand?I'm aware you'd substitute any \$s\$ term for \$j\omega\$ and then rationalise the...
View ArticleReal/Complex Zeros for Filter Transfer Function
So I've been reading into filter design and came across how to determine the transfer function of a filter, when given it's poles and zeroes. I've come across the following question that has me a bit...
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Transfer Function of Differential opamp with common mode voltage
When we consider the relationship between Vout and Vin of the differential amplifier, we connect one of its inputs each time to the ground to ignore that input voltage in the calculation, in order to...
View ArticleWhat signal to use for identifying control-to-output TF of resonant...
I have a resonant converter (DC-AC) built on Simulink and I want to find out its control to output (current) transfer function using the system Identification toolbox in MATLAB/Simulink. I have three...
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How can these passive RLC circuits change a sinusoid's frequency?
Given a sinusoid input of frequency f, an RLC network, no matter how complex, should produce a sinusoidal output of frequency f, with possible attenuation and phase shift. At least that's my...
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Expression of a feedback circuit
I'm modelling a feedback circuit in Ltspice, however, I want to work out the transfer function for it. See below for the circuit.Now I want the form of Vfb/VOA_o as:So, I've thought about breaking up...
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Solving complex opamp circuits
I'm having some troubles understanding how to solve complex circuits with opamps like the following:During my lab course (I'm a physics major) the professor showed us the solution of very simple...
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...
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Derivation of the AC small-signal circuit and the canonical form of a DC-DC...
I'm new to this forum and hope you can help me. I am in the process of designing an input filter for a DC-DC step-down converter 12V-5V/1A (Pic.1).I am trying to determine the transfer function and...
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Calculating the poles of a Circuit
I have been reading Behzad Rahzavi's Analog Design book to prepare for interviews and have come across a discussion on calculating poles that confuses me.In the following example 6.15 the book...
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