Questions tagged [phase]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
0answers
16 views

LTspice .MEAS doesn't unravel branch wrap

When doing AC analysis in LTspice, there is an option to unravel branch wrap (i.e. phase un-wrapping). However, if we use .MEAS to find magnitude and phase, there is no option to unravel branch wrap, ...
-1
votes
0answers
57 views

3 phase generator how to test / testing methods [closed]

how to test the coils are ok? can anybody help with troubleshooting steps for this 3phase generator? not sure which AVR it needs, so i would like to check the stator and coil is ok first.
0
votes
2answers
67 views

Pseudo Periodic Signal

I am reading a research paper Eyer 1999 in which they used these terms so I want to know about them since there is no source on which I can learn about these terms so that's why asking it here, it ...
4
votes
2answers
161 views

How to measure phase accurately using LTSpice?

I am trying, and failing, to measure phase in LTSpice. I've used the suggestion here ...
0
votes
2answers
26 views

What is the percentage modulation of phase modulation PM?

What is the percentage modulation of a phase modulation (PM)? Can you further explain and give detail? I am currently stuck in finding the information about this
0
votes
1answer
20 views

trigonometric expression in phased array

i have tried to develop the angles in the diagram bellow. there is not triangle where we have 90 degrees phi and theta together. why phi=90-theta ? Thanks.
1
vote
0answers
58 views

Underlying reasoning behind lead and lag nomenclature of compensation

If \$0<z, \;p\$, the Laplace transform transfer function \$\frac{s+z}{s+p}\$ constitute two distinct types of compensators. If we look at this schematic, \$0<z<p\$ (lead compensation) implies ...
0
votes
0answers
26 views

Why are complex valued zero and pole not used in lead or lag compensation design?

Consider the compensation transfer function \$\frac{s+z}{s+p}\$ so that the inequalities \$0<z<p\$ and \$0<p<z\$ correspond to lead and lag compensation respectively. It can be seen that ...
0
votes
1answer
118 views

Clock Phase Shift Not Working on FPGA

I have a project where I am using two clocks at the same frequency, with one having a -90 degree phase shift. The FPGA board I am using is an Nexys A7-100T configured with Vivado in VHDL. I have used ...
1
vote
2answers
63 views

Finding the kVA loading after improving the power factor

This is a homework question I've been attempting. But the answer I get doesn't match with whats given and I don't understand why my method is wrong. This is the question with answers. Here's what I'...
0
votes
0answers
66 views

Understanding Output From DFT

I should preface this by saying I'm a novice at all of this: I'm designing a system (using a stand-alone FPGA board combined with an ADC that offloads data to a GPU) that is supposed to look for high ...
0
votes
0answers
27 views

Usually AC quantities have the x-axis as time, but phase shifts are done in angles. How is there not a unit conflict?

This feels like a very specific and stupid question, but I have studied AC circuits for a while already. I just didn't think about it that much, but why is it established that the x-axis we use for ...
2
votes
2answers
123 views

How do I find the -3dB point on a given graph

I just performed an AC Simulation on QUCS and was asked to find values of gain and phase at low freq. and high freq and at the -3dB frequency point with the roll-off slope. The circuit is an RC ...
5
votes
1answer
131 views

Find the phase angle between two functions

Apologies if this is better suited for a mathematics forum, it's from my circuits textbook so I've decided to post here. Below is a practice problem from the textbook, with the provided solution. If ...
1
vote
1answer
58 views

What am I doing wrong in finding the phase angle of power?

Consider a voltage supply \$V\angle \phi_1\$ and a circut with impedance \$Z \angle \phi_2\$. Now the Apparent power(\$S\$) is given by: $$\bar S =\frac{(\bar V)^2} {\bar Z}$$ Thus phase angle of \$S\$...
1
vote
1answer
69 views

How to ensure signals from multiple different clocks are in phase?

I am designing a pcb where I have a signal of 10 MHz logic signal with 50% duty cycle that might be coming from different clocks. I will be using a pll frequency synthesizer to turn this into a 50% ...
0
votes
1answer
60 views

How do you find the phase lag of the current in this FM demodulation “discriminator” circuit?

I need some help understanding this discriminator circuit for FM demodulation. (L1, C1) is the primary LC tank which resonates with the carrier frequency, whose FM signal is applied at V12. As the FM ...
1
vote
2answers
192 views

Phase shift a square wave

I have an application where I would like to derive a secondary square wave from a primary one but with a continuously variable phase shift. I would like to know if this is possible to achieve in a ...
1
vote
0answers
24 views

Help needed for cis orcad + pspice

I have been trying to simulate a circuit on pspice. Simulation worked really well and pspice has given me the expected diagrams of gain and phase. I am having difficulty thought on how to use the ...
1
vote
2answers
65 views

How to graph sinusoid with phase angle

I am taking basic elec. circuits and I would like to know how to graph the wave forms with phase angles in either desmos, or octave or any other platform. I am not afraid of doing some coding for ...
3
votes
1answer
46 views

Suitability of standard-gain pyramidal horn for UWB signal

Objective I'm interested in evaluating the suitability of a standard-gain pyramidal horn for an ultrawideband (UWB) signal. However, I've had difficulty finding reliable information about the phase ...
0
votes
0answers
35 views

Traveling magnetic field

I'd like to do some experiments with a traveling magnetic field. To start with, I'd like to create a traveling magnetic field with a set of coils and try to propel an aluminum sheet. A basic model of ...
0
votes
2answers
142 views

Switching power line phases with inductive load

I have one question related to this schematic: Scenario: Source 1: AC source 220VAC, 50Hz, 120º Source 2: AC source 220VAC, 50Hz, 0º If I want to switch from source 1 to source 2 or from source 2 ...
1
vote
0answers
63 views

Two transistor pair inverter and one transistor pair inverter

Today I made DIY inverter (the top one) I managed to achieve ~2 volts from 5V usb, everything seemed to be ok. But I have question - is this the right way to make inverter? I also found the bottom ...
2
votes
3answers
68 views

Magnitude calculation of filter

I am working on a problem for a given transfer function given below and am having trouble calculating the magnitude and phase of it. The problem is specifically that I do not know what method to use ...
1
vote
2answers
93 views

How to add specific voltage offset to the “balanced phase splitter” op amp circuit?

I use the basic 2 opamps "balanced phase splitter" circuit to get 2 separate square wave outputs (0 and 180 phase). The input is 12Vpp but I need both outputs to be offset by -6V. So instead ...
1
vote
2answers
306 views

How do I find the phase of a transfer function in different ways?

Suppose there is a transfer function Now try to find the phase of this transfer function. The phase can be expressed in different forms: But each of these forms leads to a different result in the ...
1
vote
0answers
37 views

Arduino Due PWM Burst Signal with Phase shift

Perhaps someone can advise how to properly handle the case on Arduino Due when I need to generate Burst PWM signal relative to the master signal. For example there is a master channel with a frequency ...
0
votes
0answers
90 views

Why is Δt constant in phase shift measurement?

I would like to ask for some help with phase shift plotting. To be precise, with time delay between two waveforms. I am measuring two currents using an oscilloscope. channel A (blue) is my current ...
1
vote
2answers
150 views

How does an XOR phase difference detector behave when input frequencies are different?

How does an XOR phase difference detector such as AD8302 behave when input frequencies are different? Does it give meaningful results when the frequencies are close but different? Is there a simple ...
0
votes
1answer
79 views

Only detect the phase of a sinusoid multiplexed with other sinusoids of different frequencies

Is there an easy way to detect the phase of a sinusoid that has been added to other sinudoids of different frequencies (through a frequency-division scheme) without using a superheterodyne receiver ...
0
votes
2answers
715 views

LTspice three phase rectifier simulation

I am interested in creating from scratch a regulator rectifier for motorcycle. I struggle to comprehend the ground placement in the simulator. I cannot find instructions about tree phase simulation. ...
1
vote
1answer
37 views

Difference in phase response between circuit simulation and MATLAB

I have the following low pass filter: simulate this circuit – Schematic created using CircuitLab When simulating through Circuitlab, I get the following phase response (I think you should be ...
0
votes
0answers
43 views

Phase margin plot of LDO

For this LDO circuit design at https://github.com/promach/LDO/tree/development , 1) which exact circuit node(s) contributes to the zeroes near 1MHz after removing CL ? 2) If I remove "AC 1" from ...
0
votes
1answer
138 views

Buck-Boost Transformer with Three Phase Wiring

I live in a residence with 120v / 208v electrical service. (Measured as leg1: 124v, leg2: 125v, 215v across legs) I am nearly certain that the service is the result of two legs of three phase power. ...
1
vote
2answers
69 views

Phase relationships in AC circuits

Is it wrong to use the mnemonics "ELI the ICE" [ From my understand means if its inductive current LAGS voltage and if its capacitive current LEADS] in understanding the phase relationship of a ...
0
votes
0answers
31 views

buffered Op-amplifier

I am trying to simulate a buffer with an op-amp using CMOS, I am using Cadence. The phase margin I am getting is negative (not stable) about -272 deg, I am trying to reach 50 deg for a gain of 86 and ...
1
vote
1answer
233 views

What is the gain margin of the system, when the phase crossover frequency does not exist?

I have a simple questions I have a system in which the system will never reach -180 degrees for any frequency. Does that make the gain margin infinite ? If yes, does that mean that the system will ...
0
votes
0answers
49 views

Need help in zero cross circuit by using op-amp

I worked on zero crossing circuit by using opto-coupler.Circuit is It is working okay.Zero_crossing signal is There is a 2-3 ms of signal loss is happening with 50Hz of AC signal.I don't want more ...
0
votes
2answers
75 views

Is the Kirchhoff's Current Law correct?

I'm on this problem: And I'm trying to use KCL to find Vth, my approach is: Am I on the right path regarding KCL? Thanks in advance!
0
votes
0answers
267 views

LTspice - Extracting magnitude of signal from AC analysis using .meas and the phase

I want to be able to produce a measure function such that the output of that function would give me the magnitude of a signal when its phase is -360deg. I tried using .meas AC name FIND mag(V(out)) ...
0
votes
1answer
127 views

What does 'passband phase' and 'stopband phase' mean?

I've been provided with a Bode plot for an RC filter circuit with a cutoff frequency of 10kHz. Im asked to find the stopband and passband phase from the graph. I'm confused how these can be just a ...
1
vote
1answer
62 views

How to find the phase of this transfer function?

I have been trying to find the phase of this transfer function: G(jω)H(jω)=0.1695/jω(5.88jω+1) by doing this: Phase = -arctan(0/0.1695)-arctan(w/-5.88*w^2) PHASE = 0-arctan(1/-5.88*w) Is this ...
1
vote
1answer
58 views

Does powering both phases (left/right rotation) of an AC motor hurt it?

I know that one can reverse the direction of an ac motor by powering the different starter windings. If you power one starter winding, you create a magnetic bias, allowing the motor to rotate to that ...
1
vote
0answers
42 views

Phase angle in a series RC circuit

I have a simple question from an electronics textbook (Electronics Fundamentals, Pearson, 8th Ed., p510 Q 37): 10V 10 Hz AC supply, 4.7K resistor and 10uF capacitor in series, with Vout measured over ...
2
votes
1answer
296 views

Why do four cascaded all-pass filters cause a 180° phase shift?

This op-amp all-pass filter is reported to introduce a 90° phase shift at the cutoff frequency of the RC network placed at the + input. (The FET is used as a controlled variable resistor to move the ...
1
vote
2answers
110 views

Why are E and B field in phase in far-field electromagnetic wave propagation?

I am very frustrated with the fact that the E and B field of an EM wave are in phase in the far-field case. Before I get into this question I am letting you know that I already read this link related ...
0
votes
0answers
36 views

Multiplication of 2 waves in a phase detector of a phase-locked loop

What would be the product of a 60Hz square wave and a 60Hz sine wave with an approximate phase shift of -45 degrees? I could not find a proper solution to this anywhere.
1
vote
2answers
68 views

Phase Shift Power?

So I want to build a cheap AC-DC buck converter and I'm trying to eliminate parts by replacing them with "smart switching". So my idea is to ignore the capacitor which would smooth out the rectified ...
0
votes
1answer
289 views

Why 180 degrees of phase margin should be considered?

We've had one feedback on the phase difference, with the gain as 1. At 300 to 60 degrees, there's just a phase difference, and 61 to 299 degrees, the output is larger. Shouldn't we consider an angle ...

1
2 3 4 5