Questions tagged [circuit-theory]
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10 questions with no upvoted or accepted answers
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Why is any general cutset equation a linear combination of fundamental cutsets?
I have currently started studying circuit theory and my professor introduced graphs to form kvl and kcl equations. When we form the cutset matrix using fundamental cutsets it is easy to understand ...
- 121
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RC filter for a fast delayed ramp
Consider simple RC networks with 3 external terminals (GND, IN, and OUT) and, at most, 4 total components.
To be clear, each component is either a resistor or a capacitor.
For a 1V voltage step on IN, ...
- 916
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Multipole Network Power Calculation
How do we calculate the DC power consumption of a multipole resistive network, if we know the currents of all the poles (pins) and all the voltages between the poles?
Let's say for example, that we ...
- 561
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Capacitor sign convention
I am a lot confused about how to assign the current of a capacitor and the sign of its constitutive relation, because usually in physics and in engineering there are different conventions. There are ...
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Source Transformation AC
I did this problem for 7th times now. I did find this question in the book (Alexander Sadiku Fundamental of Electronics), but it's a Pspice problem to find V1 and V2 in each node. This one is source ...
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Transistor analysis with 2 voltage sources
I want to calculate the DC currents of this circuit, and based on the superpostion theorem, I thought of ignoring Vqdc9 first, in order to calulate I2, I21 and I22, as shown in figure 2. After that, I ...
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Understanding MOSFET operating transitions
I'm trying to conceptually understand the output voltage and the operating condition transitions that the MOSFETs in the circuit below go through as the input voltage is swept from 0 to VDD.
It's not ...
- 727
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Causes for negative port resistance of passive device (or obtaining |S11|>0 from measurements)
Suppose you have two reciprocal (passive) devices, A and B, both described with S-parameters \$S_a\$ and \$S_b\$. With a VNA, you measure \$S_a\$ and \$S_{\rm tot}\$ (S-parameters of AB, both devices ...
- 1,382
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Nodal Analysis #1 - Where is my mistake?
I am given a problem with its shallow solution (i.e. not all steps/formulas shown). When I tackled the problem (below), my answer didn't match the apparently correct solution. Where is my mistake? The ...
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Network theorem origin
While finding the Norton's equivalent circuit, we:
Find the short circuit current through the load
Find the resistance between the two points across which load is connected shorting the voltage ...
- 21