# Questions tagged [analysis]

Questions attempting to analyze the mathematical properties of a formula, the inner workings of a protocol, or the design of a given circuit.

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0answers
38 views

### Trying to use VNA for impedance analysis

I'm trying to use a Tektronix TTR506A to measure the impedance of a DC bus bar. I have DC blocks in place, and connected to the bus bar in a 2-port configuration. What are the correct formulas to use ...
2answers
86 views

### Electrical schematic symbol help(looks like an or gate)

I'm wondering if that little dot represents anything?
1answer
29 views

### How to calculate reactance from an impedance analyzer circuit?

Background I have an impedance analyzer that uses the below circuit: Source One can measure impedance of the device under test (DUT) by using the following formulas: ...
2answers
101 views

### Mathematical therefore symbol (∴) needed for documenting circuit analysis calculations [closed]

When doing circuit analysis calculations I use the mathematical therefore symbol in my calculations and need to document my iterations to support my analysis. There is no ASCII code for the "therefore"...
1answer
61 views

### DC Analysis of Transistor Circuits - Double vertical line symbol

I have stumbled twice across this symbol || being used in the analysis of transistor circuits. An example can be seen at this address: http://www....
0answers
31 views

### Mesh analysis to find Vx

simulate this circuit – Schematic created using CircuitLab I'm trying to solve the following circuit using mesh analysis. Here is my equation. The goal is to find the value for Vx. **Vx is the ...
2answers
67 views

### Op-Amp analysis without using op-amp gain

I have a question concerning this op-amp problem for which I need to find an expression for $v_{out}(t)$, where $V_B$ has a constant value: simulate this circuit – Schematic created using ...
0answers
19 views

### TINA/Spice/UCC3803: Unable to tune analysis parameters for 0.8 V to 4.8 V DC-DC boost converter design simulation

I need to simulate a DC-DC boost converter on TINA-TI. However, I cannot get the convergence necessary to carry out these simulations. I've tried using the parameters utilized in online reference ...
1answer
31 views

### Node analysis with voltage source, How to solve with matlab?

So i have this matlab homework where i need to find voltage on Y2 and Y3 using node analysis. Arrows indicate direction of current flow in branches. simulate this circuit – Schematic created ...
2answers
166 views

### Voltage transfer curve; MOSFET

How to classify the voltage transfer curve into various regions, as shown, (In the image, $V_0$ refers to $V_{DS}$ and $V_i$ refers to $V_{GS}$) Since, the various regions of operations are ...
0answers
95 views

### Why the opposite of the passive sign convention is not the active sign convention?

Studying the fundamentals of circuit theory, I was reading the Wikipedia article on the Passive Sign Convention and found out about the Active Sign Convention (ASC). After searching many introductory ...
2answers
63 views

### Resistive circuit analysis with dependent current and voltage source

The question in a study book says to find the current through R2. I have very little experience dealing with dependent current and voltage sources, so I get thrown off when performing loop current (...
0answers
35 views

### Compensating transistor biasing

How to analyze the quiescent conditions of the circuit below assuming the tansistors are on an array such as CA3096? (Fig 5N.21 from Learning the Art of Electronics) Both emitters are at ground, so ...
1answer
59 views

### Mesh Analysis has failed to solve this circuit

I built the following circuit in LTSpice and found each mesh currents to be (which also matches the answer sheet provided by my professor): i1: 9A i2: 8A i3: 11A i4: -6A However, I am unable ...
0answers
26 views

### Calculating low-pass filter prototype specifications

So I'm just wondering what I need to figure out before I can actually calculate anything here, (only considering the a-part now)? I understand that 2.5 GHz should be 3dB and 3.75 GHz should have 25 dB ...
2answers
43 views

### Mesh current analysis voltage and current source

Can somebody please point me in the right direction here Im trying to create two equations to solve for IA(left hand loop) and IB(right hand loop) I need two equations consisting of IA and IB to ...
2answers
100 views

### Worst Case Analysis of the LED circuit - Reg

I need to perform the Worst case analysis of the LED circuit attached. The value of the resistor has already been chosen and I am doing the calculations for min, typ and max current. Please bear with ...
1answer
80 views

### PSpice - simulation worst case - delay on AND gate?

I have a question to someone who is familiar with PSpice analysis. I have a simple circuit as below and everything works good with "typical" simulation - dstm1 gives positive impulses continously and ...
2answers
112 views

### How to calculate the voltage gain in this picture?

simulate this circuit – Schematic created using CircuitLab I know that by using $A_v=-G_mR_{out}$, and $G_m=\frac{I_{out}}{V_{in}}$, we can get the voltage gain of this circuit. After the ...
1answer
72 views

### Source Transformation

Ok, I have modified my question again about the same circuit seen below: I have to simplify the circuit using source transformation and then find the current ix. I have attached my attempted ...
1answer
277 views

### Battery Charge and Discharge Time

I am doing a case study on battery back up of a wind system with the following specification: System size: 10 kW which runs continuously for 5 hours per day. Battery Calculations: Battery type: ...
3answers
177 views

### Order of precedence for parallel operator

In electrical engineering the parallel operator || gives half the harmonic mean of two values. E.g.: $R_1 \parallel R_2 \equiv \frac{1}{1/R_1+1/R_2}$ But how should you compute \\$kR_1 \...
1answer
50 views

### Current change through Series resistors

My question surrounds a simple scenario. I have a 12V DC power source connected to 2.2kΩ/10kΩ/22kΩ resistors in series. For an assignment, I have theoretically calculated Voltage drops across all ...
5answers
112 views

### What kind of tool is used to record a voltage over time to a PC file like a waveform?

I don't have any training but am doing some hobby electronics. I would like to record a change in voltage over time, sampled at around 100+ kHz. Ideally, I'd like to record around 20-30 min of two ...
1answer
124 views

### Power amplifier simulation and real time experiment mismatch problem

Thanks in advance to anyone who will take the time to read my first post here. At present, I am doing a simulation of a power amplifier in LTSPice. The schematic and relevant files are uploaded in a ...
1answer
171 views

### Differential amplifier and large signal analysis

Let's consider this circuit: Razavi makes the large signal analysis in the ideal case, that is with an ideal current generator. He shows that Ic1, Ic2, Vout1, Vout2 and (Vout1 - Vout2) are function ...
1answer
67 views

### DDRx timing analysis

I have a question regarding timing analysis for DDR3 and DDR4 signals. How do we do timing analysis to see if all setup and hold requirements are fulfilled correctly, considering they have write ...
1answer
259 views

### Can we use nodal analysis without any information about the current

I learned today Mesh Analysis and Nodal Analysis principe (with KVL and KCL) for a computer project and I am not certain about one thing. Can we use nodal analysis with only the voltage of the source ...
3answers
69 views

### meaning of having harmonic on special signal

my question maybe seems very simple but, I'm not familiar with the answer of that; what is the meaning of harmonic of the signal exactly? I know the harmonics of the signal are signals whoes ...
0answers
51 views

### What is these factor multiplying the current of the copper wires_?

I was reading some solved problems about transformers but I don’t understand how was calculated the losses in the copper. - Enunciate: A one phase, 10kVA, 2400/240, 60Hz distribution transformer has ...
1answer
58 views

### Using my sensor values, what are relevant data analysis techniques?

I am currently trying to devise a system using gyroscope+accelerometers placed in on a hat/cap in certain areas of the head (Front-left, Front-right, Centre, Back-left, Back-right). I want to create a ...
1answer
36 views

### Small signal analysis of 2nmos

To introduce myself I am a first year EE student and an exam on AC circuits is comming up. Whilst practising I noticed one question I couldn't solve. No way I tried managed to get me the answer (which ...
0answers
103 views

### Big Muff V7 Russian design problems?

I am trying to build this version of the Big Muff V7 on Eagle but can't seem to understand the schematic quite well. As you can seen on the image , there are couple 3 switches, sw 1a , sw 1b, and sw ...
2answers
157 views

### Op Amp Summing Point Problem (Ideal)

I have a quick question on this example problem on (ideal) OpAmp analysis. I understand the basic cases of negative and positive feedback, and how there is a virtual short between the input pins of ...
1answer
213 views

### Jacob Shekel's method for ideal transformer

I would like to ask some questions relating to the thesis "Analysis of Linear Network" by Jacob Shekel. From chaper III - "The Network", section 3.6 - Network Transformations, the author explains ...
1answer
405 views

### IIP2 Second Order Intercept Rule of Thumb

I'm faced with the problem of explaining the harmonic production in a system where the second order intercept points of the cascaded components are unknown. As a way to bolster my explanation, I would ...
2answers
771 views

### Problems with DC analysis of a PMOS circuit

I'm beginning with electronics and I've picked up the book from Donald. A. Neamen - Microelectronics. I'm stuck at a simple example of DC analysis for this PMOS circuit. simulate this circuit – ...
2answers
447 views

### Are there any cases that Source Transformation method can not be applied?

When I tried to use Source Transformation method on the 12 V voltage source the problem gave me a wrong answer. If I transformed the 2 A current source it works just fine. My question here, Is there ...
1answer
100 views

### Thevenin Equivalent of this mesh

simulate this circuit – Schematic created using CircuitLab I have to calculate the resistancy value Rx, when the equivalent thevenin voltage is applied and generates a current of 2 Amperes on ...
2answers
43 views

### LED circuit analysis with PHY DP83822HF

I need help with the circuit analysis, specifically, if the LED frwd voltage range is 1.6V-2.1V and the power rail is 1.8V connecting to a 1.8V I/O, how can I figure out what amount of current (...
2answers
548 views

### BJT with Zener diode

I got the picture from my prof's notes, and I don't quite understand why there can be two different currents at the given node. If there are only two currents shouldn't the currents' values be the ...
1answer
108 views

### Power amplifier input source current path

Can anyone draw (or write in text) the small-signal path from signal source XFG1 at input of Q1 base to amplifier load for positive and negative input signal swing?
1answer
66 views

### Half of differential tage voltage gain

I can't understand why is 2Rpi in equation 375/376. It looks like the current ib1 goes through Rpi of first stage and through Rpi of second stage but it must go through first Rpi to ground and back to ...
1answer
53 views

### Form differential equation pair from discrete time system block diagram

I have a discrete time system block diagram. And my question is what is the output y(k) I managed to get what is V(k) $$V(k)=\frac{1}{2}*V(k-1) +U(k)$$ But now i can't form y(k) because ...
1answer
954 views

### using mesh analysis with capacitors and impedances

My circuit analysis skills are a bit rusty; since, I been coding for a long time now. I'm analyzing a switching circuit's on and off cycle. I am solving for Vc2 in terms of D and ( 1 - D). here is ...
1answer
121 views

### Health index / performance curve of a motor

I am collecting daily data of motors that consists of vibration in three direction x,y,z , RPM, Temperature, kVAh, kWh, kVArh, average voltage (LL), average voltage (LN), average PF, average current ...
1answer
40 views

### Nodal Analysis #2 - 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 ...
0answers
47 views

### 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 ...
1answer
211 views

### How can we do KVL like this

[edited] I'm DC analysing a cascode configuration of BJT and my teacher do the KVL of the circuit like the Black arrow in the picture. But I don't understand why the KVL straight from the node to the ...
2answers
113 views

### Help with analysing OP AMP circuit

This op amp circuit is used to offset stepped-down AC voltage by 2.5V(approx), so that the RMS of the voltage can be calculated. I can not change the configuration of the circuit, so that is ruled out....