Questions tagged [phase-shift]
The phase-shift tag has no usage guidance.
169
questions
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2answers
69 views
180 degree AC phase shift using capacitors
Let's say that I have a high-frequency oscillator (350 GHz for instance). I would like to know, for the sake of my own learning, how to phase shift this signal by 180 degrees.
Would having 2 caps in ...
-2
votes
1answer
68 views
Dividing clock frequency and then phase shifting it [closed]
I have a 60MHz source clock. I need to create four 15MHz clocks aligned with the source clock, such that each next clock is phase shifted by 90 degrees from the previous one. How can I achieve this? ...
0
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4answers
38 views
How to interpret the S21 phase measured by LCA or VNA?
I have measured the S21 phase of my device, which came as below. I would like to know if this phase is with reference to the input or with reference to the DC?
0
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0answers
34 views
How can I measure phase shift in Multisim using Tektronix oscilloscope?
I have to measure the phase shift between input and output of amplifiers.
Below is an example circut with voltage charts (yellow is input, blue is output.)
How do I measure phase shift between them?
I ...
0
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1answer
44 views
In a delta generator, will each phase voltage always be shifted 120°?
I'm confused by all the different phases and angles.
Where I live we have a delta generator (3P3W) 230 V system. I was told that the three voltage phases will always be shifted 120° from each other...
...
1
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1answer
52 views
Explaination on phasor diagram for RL circuit?
This is the phasor diagram which I had drawn from the value of phase difference(deg) from MULTISIM. I'm a bit confuse here... shouldn't by theory, when inductance is increase, thus the degree for Vl ...
0
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2answers
43 views
Phase shift oscillator: confused about phase shift per stage?
I am just learning about the RC phase shift oscillator with 3 RC stages and an opamp. From what I've
learned - each stage will introduce a phase shift of \$60^\circ\$ so the total phase shift will be \...
0
votes
1answer
71 views
Phase shift just with a logic gates
Is it possible to shift the signal phase in the digital domain without the use of a microcontroller, only with the help of logic gates? I would like to have control and, for example, use a ...
0
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1answer
63 views
Regarding transistor RC Phase Shift Oscillator
I have been recently studying about the transistor RC phase shift Oscillator. I calculated the attenuation provided by the RC network to be equal to 29. But when we use a transistor to make the ...
0
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1answer
39 views
Synchro with 1 phase grounded
I have been doing some research into synchros and I know the base equations from to determine the voltage difference between phases. Those equations can be used to determine the angular position from ...
2
votes
3answers
119 views
Whats the justification to determine the phase sequence?
I have been told many times that one way to determinate the phase sequence of a three phase system is to use two resistances and one capacitor (or inductor) in star (wye) connection, then connect two ...
2
votes
3answers
112 views
Phase shift in an active RC shifter
How can I find the phase shift as a function of \$R_1\$? I found online that the equation is \$\phi = −2\arctan(R_1/X_c)\$, I just can't figure out why the 2 is there.
simulate this circuit – ...
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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
99 views
phase-shift oscillators
I'm starting to learn about phase-shift oscillators and I'm a little confused at the outset. Suppose you have an amplifier with a feedback circuit with transfer functions A and β respectively. My ...
6
votes
3answers
241 views
Is it possible to model a single-phase phase-shifting transformer in LTspice/Multisim/PSpice?
As you know, three-phase two-winding transformers can produce a phase-shift between the line-to-line or line-to-neutral phasor voltages of one side and the respective line-to-line or line-to-neutral ...
3
votes
1answer
181 views
How does the resistance-capacitance oscillator shift voltage by 180 degrees?
I'm trying to wrap my head around how the resistance-capacitance oscillator shifts voltage by 180 degrees.
As far as understand, a capacitor shifts phase for current, not voltage.
What am I missing ...
1
vote
1answer
61 views
Generator synchronization to grid and angle difference
Following conditions are needed for generation synchronization :
1 Phase Sequence
2 Voltage Magnitude
3 Frequency
4 Phase Angle
I have question about Phase angle assuming that the frequency is the ...
0
votes
1answer
54 views
Phase-shift a Broadband Time-Domain Function
Suppose we have an operator \$A_\phi\$ which phase-shifts a sinusoid by \$\phi\$:
$$A_\phi[\cos(\omega t)] = \cos(\omega t + \phi)$$
In phasor domain, \$A_\phi = e^{+j\phi}\$ is a complex constant.
I ...
0
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0answers
37 views
RMS error of a phase shifter
I am trying to develop a Matlab code that calculate the RMS error of a digital phase shifter. After writing the code I have used the s2p data provided by different manufacturers and tried to produce ...
1
vote
1answer
61 views
Relationship of complex load angle, voltage/current phase different and load factor
Question:
Explain the relationship of the load impedance angle to the displacement coefficient cos(𝜑1) and the power factor λ at the input of the rectifier
Not sure exactly what its asking for.
It ...
0
votes
1answer
62 views
How to shift the phase (185 degrees) of the triangle waveform without a distortion?
I need to phase shift the input waveform exactly 185 degrees. Unfortunately, I can't find a good/simple way to do it. Thanks.
1
vote
1answer
163 views
AC zero Crossing detection with transformer
I am working on a circuit that requires zero crossing detection. I detected the zero crossings of the 230 Volt AC sine with the help of a full bridge rectifier and a 4N25 optocoupler with a pull up ...
0
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1answer
97 views
RC Phase Shift Oscillator Design
I am trying to build a phase shift RC circuit as shown below. I want the output frequency to be 100Khz at a 5V input and I want to be able to lower the output frequency as I lower the input voltage. ...
0
votes
1answer
69 views
Setting the cutoff frequency of an active bandpass filter (op amp) and finding the phase in LTSpice
I am doing an exercise and my op amp cutoff frequencies are: lower 1kHz, upper 10kHz.
I have found the phase shift of the filter, but since the graph I get does not make much sense for me I think it ...
0
votes
4answers
67 views
Phase and voltage conversion
I have a hypothetical question in regards to phase conversion and transformers, more specifically on their combination. I am not a certified electrician or engineer, so I don't know what all goes into ...
1
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3answers
72 views
Analog method for measuring distinct phase shifts
I have a signal that undergoes distinct 90 degree phase shifts but has an unpredictable frequency over a predefined range (anywhere from DC to 300MHz). From my limited knowledge on PFDs, they can only ...
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
1answer
40 views
possible CMOS techniques for altering the pulsewidth and phase shifting of a pair of complementary squarewave signals
My question is very simple in terms of input and output required. Following illustrations are for input and output:
input signals are a pair of complementary signals operating under 1MHz of speed. ...
8
votes
6answers
3k views
What is Capacitive Loading (Intuitive understanding)
I have read about capacitive loading. But what does it actually mean like intuitively? Just asked this question so as to get an intuitive answer and also know what should I understand when one says ...
2
votes
0answers
95 views
How do you calculate phase shift induced by a shunt capacitor?
Given a simple loaded-line shunt-capacitor phase shifter, how can I calculate the phase shift and insertion loss at S21 caused by the shunt capacitor (varicap in my case, but for any cap) assuming I ...
4
votes
2answers
212 views
Why is there no frequency compensation required in TI's TL494 example buck regulator design?
This example circuit is given in Texas Instrument's application note SLVA001: "Designing Switching Voltage Regulators With the TL494":
They use a 140 μH inductor and a 220 μF electrolytic ...
0
votes
1answer
56 views
AM circuit LTspice
I have to analyze the following circuit and understand its function.
As far as I understand the top part is the simple phase-shift oscillator generating output sine wave at circa 145kHz.
The NE555 is ...
2
votes
1answer
92 views
L-C-L vs Pi network
I am playing with a simple high-pass phase shifter implemented as a Pi network in Sonnet Lite with a center of 146MHz and discovered something by accident that I would like to understand:
By mistake, ...
0
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0answers
23 views
Modelling transfomer phase shift in Matpower case data
A branch in Matpower that models a transformer using the Pi model has the phase shift component. However, in this document https://www.gridpack.org/wiki/images/7/7e/...
0
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1answer
55 views
how to shifted phases in PWM with PIC18F4431
I am trying to design a driver for a BLDC motor.
I have managed to generate 6 PWM signals with the PIC18F4431.
But I don't know how I can shifted the phases.
I attach my code and the image of the ...
0
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0answers
44 views
Analog phase shifting circuit
I have a high voltage(let's say +-100Vpp) sine signal of 500khz and i want this signal to be phase shifted(+ve) by 0, 90, 180 and 270 degrees.
That is a circuit which has 500khz input signal and 4 ...
1
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1answer
75 views
How to calculate the total signal strength and phase shift of multiple signals in a reciever
I have a simulation to make where I have an array of transmitters that transmit the same signal. At a random point, which I have to consider as a receiver I have to measure the phase shift of the ...
0
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1answer
25 views
In a RCL circuit; where V_C > V_L is the phasor angle leading or lagging?
Is this example correct in stating that the phasor angle is leading by 38.323deg?
2
votes
3answers
2k views
How to calculate phase shift of a low-pass filter's output?
I'm simulating a basic low-pass RC filter in Proteus, and I need to find the phase shift of the output at varying frequencies. I've plotted a frequency response graph which shows the phase against ...
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0answers
50 views
Oscilloscope Phase Shift
I have a university research that i am conducting right now. My objective, as a first step, would be to phase shift an NRZ signal at high frequencies >40GHz, assuming this signal is already locked ...
0
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2answers
732 views
How to get working UA741CP IC
Recently I've decided to build a simple RC oscillator circuit using UA741CP IC as an amplifier in my circuit. I think the way I connected the resistors and capacitors to the chip is correct. But the ...
1
vote
1answer
59 views
Is the Wien Bridge oscillator essentially a resonant filter?
According to chapter 21 of Electronic Principles(8th edition), the Wien bridge oscillator uses the Johnson-Nyquist noise from one of the resistors as the startup voltage. It selects for a desired ...
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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
71 views
Delta wye transformer, voltages explanation?
So I'm doing a delta wye transformer simulation in simulink, and I need some
clarification about transformer voltages.
Here's a image from a youtube video
We have phase voltages on primary that ...
0
votes
1answer
1k views
How to find phase shift(angle) between two signals in simulink?
So I'm doing a delta wye transformer in simulink and phase shift between these two signals should be 30 degrees, but how to show that, or calculate it? And how to find angle of each signal?
1
vote
2answers
172 views
Simple phase shift circuit
I’d like to be able to phase shift a raw guitar signal with a potentiometer between 0 degrees and 360 degrees. The signal is roughly 1V peak to peak and has a fundamental frequency range between 80Hz ...
0
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0answers
41 views
Convert AC to DC using Phase Shift Oscillator
from what I know, we can convert DC to AC by using Phase Shift Oscillators. I'm able to pull off the manual calculations, but as for simulation on Multisim 14.2, I didn't get the desired graph(phase ...
0
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2answers
85 views
Phase Lead and phase Lag
I find the concept of phase lag and and lead quite confusing.
Suppose we have two voltages
\$V(\theta) = V_{max} \cdot \sin(\theta + 30^o)\$
and
\$V(\theta) = V_{max} \cdot \sin(\theta + 60^o)\$
...
0
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0answers
246 views
Phase angle between two sinsoidal currents
I am having trouble solving an example in the book I came up with another solution, anyway the question asked to find the phase angle between two give currents- see attached image what I did I ...
0
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0answers
113 views
Why do phase-shift oscillators appear to use high pass filters rather than low pass?
I noticed that a lot of designs of phase-shift oscillators use a sequence of high-pass filters to get the phase-shift. Is there any reason why one couldn't use three low pass filters instead? I ...
