The circuit-analysis tag has no wiki summary.
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Phase Angles in Series/Parallel networks
INTRODUCTION:
I've been having a hard time in class trying to understand phase angles. I understand a few concepts which I've stated below for clarity in regards to this discussion.
1.) ...
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0answers
23 views
How to match this given circuit to a model for a simulation?
I have to simulate the electric field within a gas filled discharge gap generated by a radio frequency voltage generatio. The circuit, provided to me by the experimentators somewhat far away, is given ...
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0answers
23 views
LC Dual Mode Resonator Modelling [closed]
I am trying to model an ADS circuit of my Dual Mode Resonator with two LC resonators and Inductively coupled Input output ports in MATLAB. I want to model this circuit and this response in MATLAB:
...
3
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2answers
149 views
What is the purpose of capacitors and resistors in this USB bus?
Trying to understand the purpose of the capacitors and resistors in this bus powered configuration for the FTDI chip, I think the capacitors are for filtering high frequency noise, not sure what the ...
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1answer
76 views
Reason for certain steps in Circuit Analysis
The image is from this lecture.The instructor Prof. Shanthi Pavan says that the part encircled in orange can be replaced by a voltage source with current through \$v_1\$ as \$i_1\$ and not \$i_1 + ...
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3answers
105 views
How exactly does switched capacitor system work, what exactly is the detail of the primitive that switches
I have been seeing these switched capacitor circuits for some time now and have even seen Z-transform being used to model how these circuits behave. While I can see that there is some capacitor that ...
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2answers
54 views
How to use integration or differentiation to optimize frequency in achieving a specific phase angle?
Question:
With source voltage kept constant at 8V peak to peak vary the frequency until the phase angle "theta" Vr referenced to Vs is approximately 45degrees. Record the Vpp value across R1 and the ...
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0answers
44 views
What would a simple and correct Circuit Equivalence Tester circuit be?
This circuit's job would be to test if two circuits behave identically, not taking into consideration calculation time differences between the circuits up to a timeout. Here is my attempt, I have not ...
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0answers
36 views
AC Circuit Analysis (Determining the vectors) Help!
INTRODUCTION:
I'm having a rough time completing this problem. I've arrived at what I believe are the answers but I have no way of being sure if their right. I tried to plug this circuit into my ...
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2answers
92 views
measuring transistor beta (Hfe) - Ib anomalies explanation needed
I've been struggling with details of building accurate (+-1% tolerance max) beta meter. The simplest idea I came with went to a diagram as shown below, with R set to a value providing 0,01mA current ...
2
votes
1answer
66 views
transistor loop to limit the current
I am trying to implement the DALI TX/RX circuit below.
The description says:
The other transistor (T2) is controlled by the current flowing through the
resistor (R1). If a DALI slave unit is ...
6
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2answers
187 views
Inductor equivalent of capacitor's charge
Because inductors share similar equations in their charging/discharging cycles, I am wondering if inductors have something like charge.
Capacitors have capacitance and charge while an inductor has ...
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1answer
109 views
non-inverting schmitt trigger op amp - replacing a zener diode on the input
I wonder if it is possible to replace the second figure below with the first one? Would both Vo output be the same on the figures below? If they are different, ...
2
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2answers
95 views
XML schema for electric circuits
Is there any XML schema to describe electric/electronic circuits? I am thinking of something like a netlist, but using XML markup.
5
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3answers
171 views
When use Voltage divider in circuit analysis
I am trying to find the voltage in R2 with voltage divider, this is the schematic:
simulate this circuit – Schematic created using CircuitLab
but I can't, and I don't know how to apply ...
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0answers
43 views
Band Reject Filter Transfer Function Help (MathCAD)
I designed a broadband filter for one of my classes and in MathCAD I used this function to plot the expected transfer function of the Band Reject Filter. However when I input the values for it, it ...
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3answers
109 views
Under what conditions should we use negative voltage? [duplicate]
As mentioned in the title I'm curious and confused under what circumstances a negative voltage should be used? Does it mean in a negative voltage power supply the current is flowing from ground point ...
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3answers
85 views
Thevenin Equivalent Circuit
QUESTION:
I'm having a hard time figuring up what the Thevenin Voltage is along with Thevenin Resistance for this circuit below. I'm also confused on what I'm suppose to do when there is a current ...
2
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1answer
62 views
Finding values of LRC circuit when frequency is given
I am trying to solve the following question. The original question is:
The given impedances of the series LRC circuit are established at an
angular frequency of 2000 rad/s.
Calculate the ...
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0answers
45 views
Amplifier circuit - NMOS mode of operation? Gain?
Ok I have the following circuit, with values of variables:
\$\displaystyle R_{1} = 1 M\Omega, R_{2}=10k\Omega,~~ k_{n}C_{ox}\frac{W}{L}=1mA/V^2\$ , and \$V_{T}=1V\$.
1) When \$v_{IN}=0\$, calculate ...
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0answers
74 views
About a homemade SLA battery charger
After assembling a simple emergency light kit, it's time to build the battery charger.
Details: Most of the time, the battery won't be used and the circuit will be always connected to the energy ...
1
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1answer
90 views
Calculate current in branch using Thévenin's theorem
E1 = 20 V
E2 = 5 V
R1 = 10 Ω
R2 = 20 Ω
R3 = 10 Ω
R4 = 10 Ω
R5 = 5 Ω
Calculate Ix.
It's obvious that the Thévenin's theorem should have been used, but the implementation is a bit ...
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2answers
86 views
Circuit analysis with nodal analysis
[EDIT] I'm going to give mesh analysis another go, and see where that gets me.
[DOUBLE EDIT] Mesh analysis didn't get me anywhere :(
Im tearing my hair out over this problem, so any help would be ...
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1answer
101 views
Help me in understanding the circuit [closed]
I want to understand this circuit.
The Circuit:
My experimental layout:
Question :
According to the circuit.. It mentions that the "The Thermal Pad is to be connected to a Ground Plane (GND, ...
1
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1answer
92 views
Find Vo in an op-amp - transistor circuit
I have a schematic with this system and can't find out how it works:
simulate this circuit – Schematic created using CircuitLab
How do I find Vo in this network? Please explain it "for ...
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3answers
161 views
Checking materials (cheapest possible) to be used for a solar dark-detecting LED light bulb circuit
I want to make this circuit, which includes a joule thief:
It's for a solar dark-detecting LED light; and I'm trying to follow this guide: ...
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3answers
238 views
Solving this op-amp circuit
I would appreciate some help solving the following circuit. I've been trying for a very long time and can't get the same answer the book has. I'm trying to get \$ V_o \$ in terms of \$ I_{os} \$.
...
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2answers
104 views
Basic circuit analysis - diferential equation
This is the circuit I got from an example in a book "Practical Electronics for Inventors", on page 48:
How can one understand that \$0=R\frac{dI}{dt}+\frac{1}{C}I\$ implies ...
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0answers
59 views
Branch impedance matrix definition
I know what mesh & node impedance matrices are, but what is a branch impedance matrix? Google is not helping me find a definition. I presume the branch admittance matrix just contains the inverses ...
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0answers
161 views
Is there a way to create a 2 bit / 4bit memory element using Flip Flop?
I have come across Flip-Flop memory elements & it seems really cool, So far i have only did Set, Reset Using Flip Flop, I am eager to know that Is there a way to create a 2 bit / 4bit memory ...
4
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3answers
154 views
Circuit Analysis With Non-Ideal Diodes
I have seen how to do circuit analysis with ideal diodes, that is replace forward-biased diodes with connections and replace reverse-biased diodes with gaps. But the problem is that I want to know how ...
2
votes
2answers
76 views
How can I improve my Freq to Voltage circuit?
I had a term project which was based around Analog-to-Digital convertors.
We used anLM2907 Freq-toVoltage convertor to take a 150mVpp sine wave (0- 1kHz) and convert that to a voltage. The voltage ...
3
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2answers
153 views
How to find Thevenin resistance?
I've got a question, and I just keep getting myself confused when I try to solve it.
I've attached the picture of the circuit (sorry it's so dodgy, paint is hard! :P)
And the question is:
replace ...
2
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4answers
111 views
Resistor and heat
Due to a power supplier manufacturer chanege the BOM lately, it require now more current to be drawn (need more load on my circutry side). I added a resistor in order to draw more current from the ...
3
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1answer
435 views
PSpice homework Question
I'm having trouble with this question. Can somebody help?
I know the equation for part a) is:
$$P_{\text{max}} = \frac{1}{4} \cdot \frac{\mid{}V\cdot{}t\cdot{}h\mid{}^2}{R_\text{L}}$$
And I'm ...
0
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2answers
130 views
Format Approach to NODAL ANALYSIS
SITUATION:
Nodal Analysis is nothing more than applying KCL and is very powerful. I'm working on developing a more clearer perspective of two approaches in Nodal Analysis "GENERAL & FORMAT". Mesh ...
3
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1answer
332 views
How to apply the Barkhausen criterion in order to know if a system will oscillate?
How to analyze or apply the Barkhausen criterion for oscillation of the astable multivibrator below?
The criterion talks about the magnitude of the products in a loop must be equal to 1 (ideally)
...
1
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1answer
79 views
Circuit breaker selection that can be tripped with a microcontroller
I am designing a system that will simulate an upstream fault with a micro-controller action. the micro-controller will send a signal to a circuit breaker to simulate a line to ground fault(just like ...
3
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2answers
194 views
Nodal analysis for current controlled current source
Okay here I go. I just started learning nodal analysis technique but I feel its difficult in solving the circuits consisting of dependent current and voltage sources.
Im unable to solve this circuit. ...
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1answer
134 views
When to use Nodal Anaylsis / Mesh / Superposition?
I'm studying these three methods and i'm confused on exactly which one is used when. This is a very broad question. Therefore, could some explain in general terms the difference of the three methods ...
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3answers
163 views
Node Analysis - current calculation
I have a cicuit here that's giving me trouble when finding out what V1 and V2 equal.The book says that I1 is traveling through the 8 ohm resistor (R1) towards ground. But when I build the circuit on ...
1
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1answer
79 views
KCL Node Analysis
I can do mesh analysis with KVL no problem however trying to switch over and to KCL with Node analysis I cannot understand.
How do you determine current coming in to the node? I don't understand how ...
0
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1answer
100 views
Circuit Simulator is being funky
This circuit simulator called "iCircuit" for mac users is showing some weird readings. It's showing a reading of 2.4mA and i'm getting 6mA in my calculations for this circuit I threw up. Am I missing ...
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2answers
243 views
Calculate transfer function with Sine generator
Given this circuit I would like to know how can I find it's transfer function.
A method I've considered was to use Node Equations on nodes 1 and 2 ,
and I have a few things that I don't find clear ...
