# Questions tagged [circuit-analysis]

Circuit (Network) analysis is the process of finding the voltages across, and the currents through, every component in the network.

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### Circuit Analysis and Voltage

I'm trying to get a better understanding of the node method for circuit analysis. I understand the process, but I'm trying to verify that each step in the method is consistent with my overall ...
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### GND pin of a RF device

I have a doubt about how to connect the following device (a RF power meter, AD8318) to the external circuitry. Let's consider the device: There is the input RF coaxial cable, the power supply ...
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### Determine the nodal voltages in the circuit

This is a practice question from book: Engineering circuit analysis / William H. Hayt, Jr., Jack E. Kemmerly, Steven M. Durbin. — 8th ed. (pag. 91) . Determine the nodal voltages in the circuit: Ans:...
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### Can a faulty motor cause issues to another motor?

This is regarding the circuit of my 3D printer mainboard. I had an obersvation: It has a cooling fan (40X10 24V) which is having issues lately - it stops working sometimes, and when pushed to rotate, ...
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### calculate output current caused by two sources

This is a common source degeneration with i1 and i2 are two current sources to model noise generated by the transistor and the ...
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### RC low pass filter difference with RC high pass filter

This is a low pass filter: simulate this circuit – Schematic created using CircuitLab This a high pass filter: simulate this circuit If we add a load resistor to the high pass filter it ...
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### Why is this two-inductor circuit first order?

I have the following circuit with two inductors. Apparently this is a first order circuit (judging from my solutions for $i_1, i_2$; and circuit simulations) but it's not intuitively clear to me ...
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### Can USB-C cable/port become corrupted and only transmit partial power/data? Or would it stop working completely if broken?

I plugged my usb-c cable into my device pretty roughly and felt/heard something crumple, and I'm thinking I may have damaged it. Everything seems to be working fine though, but I'm worried that its ...
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### How does this circuit startup?

This circuit is from an Elenco AM/FM Radio kit. How does this circuit start working when the 9 VDC power, at the top right of the schematic, is applied? Specifically, what puzzles me is the "...
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### How Do You find The Cutoff Frequency of a Low Pass Filter?

A lowpass filter exists around R1,R2,R3 and C2 but how would you find the cutoff frequency? I think that you have to first find the Thevenin equivalent circuit and this is what i got: RTH = (R1//R3)//...
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### What can this circuit be useful for? [closed]

I have calculated the boolean functions for r and f: f = (¬s1 ∧ s0) ∨ (s1 ∧ ¬s0). ...
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### Convert expanded boolean function into a switching matrix

I am given a boolean function f(x) that I have to develop them according certain variables, let's call them a0 and ...
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### Draw curcuit by transfer function

Using one operational amplifier, draw the circuit of an amplifier with the following transfer function: Vo = 6V1 + 3V2 + V3. Using one operational amplifier, draw the circuit of an amplifier with the ...
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### Ignoring nodes/wires when combining resistors to find equivalent resistance

Is the 2nd step in the solution sheet wrong? I don't know how they can just ignore the node where the 9 ohm resistor and the 12 ohm resistor were located. Wouldn't current be branched/divided when it ...
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### Confusion Between Dual Capacitor/Inductor Circuits

I'm trying to physically understand the responses of this pair of (dual) circuits: a step current source driving a capacitor and a step voltage source driving an inductor. simulate this circuit &...
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### Problem with powering a high and lower power circuit

I have a problem with the following circuit. simulate this circuit – Schematic created using CircuitLab I try to turn on a normal 120V light bulb controlled by a relay activated by a low power ...
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### How do the collector and emitter terminals of a BJT operate when no power supply is present?

let's consider an example of transistor amplifier: Let's consider the case in which power supply is not connected (so between VCC and GND there is an open circuit). What will I read at the output ...
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### Why does this ramp generator drop level outwith 60Hz / 10kHz range?

I found the following circuit in an old Elektor article: It is a [edit: ramp generator] that repeatedly (a) charges C3 through R4 to build a ramp, and (b) briefly shorts C3 across T1 to reset the ...
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### Direction of current in Phasors Analysis

I'm learning AC circuit and phasors form. In the exercise below, when using nodal analysis they choose the direction of current flow in the circuit then calculate the result. But I wonder why that ...
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### fast analytical technique identifying poles/zeros using degree of freedom

I encounter some engineers who can quickly spot poles and zeros in the circuit by identifying "degree of freedom". For example, a typical technical discussion goes like : "a miller ...
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### Calculation of drain current in JFET

simulate this circuit – Schematic created using CircuitLab If IDSS= 10mA and Vp= -5V, when VDS=Vp, what is the value of ID and VGS? Lets say I apply KVL on drain-source loop. Then I get VDD-IDRD-...
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### Can anyone check this circuit for a musical Tesla coil for me? [closed]

The attached circuit diagram is the one I will be using to make my musical Tesla coil for a project. The AC source on the right is the audio input through AUX, and the circuit will probably run around ...
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### How can I stabilize unstable voltages over a silicon plate?

I've been working on an experiment where I investigate the hall effect over a circular silicon plate. Here is the schematic The two channels of the oscope are placed between the plate. Each of the ...
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### Determine the functions of the given multiplexers

In the following problem I want to understand a section of the overall problem. The image only show 2 MUX(es), however the original question has a lot more that are ...