Questions tagged [phase-shift]
The phase-shift tag has no usage guidance.
118
questions
0
votes
1answer
73 views
How to get phase shift in this task and in general?
So the task says:
In the serial circuit connected to the 50 Hz frequency alternating
voltage, effective voltage values 𝑈 = 220 V, known voltages 𝑈L = 660
V and 𝑈C = 500 V. The current in ...
0
votes
0answers
29 views
Understanding Phase Shift Full Bridge DC-DC Converter
I am studying PSFB DC DC converter. I am a bit confused in understanding the topology.
For reference of the functionality I am taking UCC28950 Controller IC's circuit, From TI which have provided in ...
0
votes
0answers
15 views
Modeling phase delay in high frequency resonantly coupled inductors
I am interested in simulating resonant wireless power transfer circuits similar to the ones developed by MIT and others. So far, I have been able to successfully create a basic simulation model of a ...
5
votes
2answers
84 views
Vector Voltmeters vs Oscilloscopes?
I have come across some electronic engineering papers from the mid 1970's where they were testing tunable phase shifters.
To measure the phase shift they used a vector voltmeter. As this is not a bit ...
0
votes
0answers
28 views
BEMF and zero crossing point detection
I am trying to control a BLDC motor without sensors using BEMF method and zero crossing detection. I managed to detect the zero crossing point but I am not sure if it is correct. I read that the hall ...
0
votes
1answer
35 views
Can AC voltage phase change across an SSR?
I got an SSR (Picker PCS15-D-240A-25ZL) to control a single phase 240VAC North American circuit going to a heating element on a homebrew setup. One of the load wires goes through the SSR and the other ...
1
vote
1answer
28 views
Handling Phase Shift with ANC
I've been working on a circuit to do active noise cancellation, but I'm worried about controlling the phase. Here are my assumptions, and I'd love some help understanding 1)what of my assumptions are ...
4
votes
2answers
100 views
Finding phase shift between the voltage and current
I am trying to find the phase shift \$\phi\$ of this circuit.
I am using the formula:
$$\phi = arctan{\frac{X_{L}-X_{C}}{R}}$$
Substituting in the values:
$$\phi = \arctan{\frac{2000\Omega-4000\...
0
votes
2answers
131 views
Phase shifting with unity gain
I have come across about active all pass filters which provides phase shift with unity gain.
I dont know this is the common practice in part of circuit design. For a fixed or variable unity gain ...
0
votes
0answers
42 views
Is a load bank always 3-phase or is a 4-phase possible?
I am designing a low voltage installation and the customer asked for a cell for a load bank. Now he drew this in 4-phase, but I did not encounter this before. Is this possible? I thought they were ...
0
votes
1answer
60 views
How can I match phase voltage between a transformer primary and secondary?
I am trying to make a circuit to transform 240VAC, split-phase to a 0 to 5V waveform for an Arduino ADC so I can measure the mains voltage. I have read this question (How to measure line voltage (220V)...
0
votes
1answer
80 views
Resolution of FRR Function
I am working with a oscilloscope GWINSTEK gds-2074a. As per the time resolution is concerned, turning the dial all the way down, it shows that it can go down to 1 ns. There is a Delay function in the ...
0
votes
2answers
122 views
How can I make a phase shift in an audio signal without changing the frequency response too much?
I have the following problem: I have two amplifiers, one is a mono amp for a subwoofer and the other is a stereo amp for two two-way speaker enclosures.
The subwoofer and two-way enclosures have a ...
0
votes
0answers
35 views
Creating a 90 deg. circular polarized phased array using two Yagi
Imagine two 2.4Ghz Yagi (WiFi), one mounted with blades horizontal, the other's blades vertical, both aimed at the same target. Each has the same leg of its coax cable (Xmeasurement) longer (either ...
0
votes
0answers
27 views
Effect of impedance mismatch on phase of the signal
The effect of impedance mismatch on voltage measurement is known but is it possible for impedance mismatch between a oscilloscope and function generator to cause a phase difference? In my setup I have ...
0
votes
1answer
49 views
asymmetric signal split at SMA Tee (wires of different lengths)
I set up a circuit, as shown in the schematic below, to see firsthand how the signal paths of different lengths could lead to a phase difference.
I am using an SMA Tee and there is no reason to ...
0
votes
1answer
143 views
What is phase ripple and how is it measured?
Whilst reading up on phase response, I came across a reference to "phase ripple". Specifically, I was reading this article by Keysight, on phase measurements. From my understanding of the article, ...
0
votes
6answers
185 views
How do I set my speakers out of phase?
A little bit of context:
I'm doing a project for my physics class where I could choose the topic, and I chose to do phases in sound and noise cancellation (wavelengths and frequencies). Essentially, ...
1
vote
4answers
706 views
Why is there no Phase Shift in CC and CB Configuration
I am curious why in common base and common collector configurations there is no phase shift between output and input (at low frequencies, where stray capacitance doesn't "kick in" yet)?
I get it why ...
1
vote
1answer
191 views
Can someone help me understand this transistor circuit?
I believe the purpose of this circuit is to perform SQ decoding.
It is supposed to shift the phase 90 from 100Hz to 10Khz.
I'm interested in listening to the quad version of the Pink Floyd Animals LP, ...
0
votes
1answer
135 views
Measuring phase shift between current and voltage with microcontroller
I am trying to understand how this design is used to measure phase shift between current and voltage of an AC signal. From my understand there should be a PWM signal generated on the output. Resistors ...
1
vote
2answers
98 views
Is there a circuit that can create dispersion?
I'm wondering if there's a circuit that would create dispersion effects. Essentially, I'd like to create a circuit which can do the following:
Spread out a high frequency pulse. For example, put in a ...
0
votes
1answer
115 views
Is there an analog circuit or filter that can produce constant phase shift over a specific bandwidth?
I need to match the phase of two signals coming from a pair of transducers over the 10Hz to 4 KHz range, the difference between the two transducers is really close, however one of the transducer lags ...
1
vote
0answers
74 views
Physical significance of positive group delay with negative phase delay
This question is an addendum to: Is group delay the same as the delay of a certain frequency?
Lately, I've been going back to basics to better understand the concepts of group and phase delay, so I ...
0
votes
1answer
55 views
4th order (active) filter, I want constant phase shift band
I'm needing to improve an existing fourth order active filter design.
The filter amplifies 10-100 kHz signals as desired, however the phase shift is causing problems. 10 kHz signals are phase shifted ...
2
votes
2answers
250 views
Is group delay the same as the delay of a certain frequency?
I know that group delay is the delay of the envelope, or the derivative of the phase with respect to \$\omega\$. What I want to know is what exactly happens in the time domain.
For instance take the ...
0
votes
1answer
156 views
Log-Taper Variable Resistor from Linear-Taper
I'll start by saying: I've read quite a bit about how to make a "log taper potentiometer" using a resistor and linear-taper potentiometer, but I'm not sure if that will work in my case.
I'm working ...
2
votes
0answers
78 views
Beam Steering range of a phased array antenna system
What is the beam steering range of a phased array dependent on? For example, if I use an antenna array of Nx1, with a phase shifter resolution of \$\frac{2\pi}{k}\$ and the antenna elements spaced at \...
0
votes
0answers
54 views
90 degree phase difference in current between inductors
The schematic is a circuit I am designing. The current through the leg with the inductor and capacitor in series must be 90 degrees offset from the other leg. The rectified current pulses through both ...
1
vote
0answers
61 views
Phase Shift Oscillator Feedback Gain
I'm having trouble getting to the result of the feedback gain (β) of the following phase shift oscillator:
Is the circuit correctly designed?
How do I calculate the feedback gain?
Edit: Is it ...
0
votes
3answers
124 views
Do Quadrature and Bubba oscillators count as phase-shift oscillators?
I need this information for my school report. Do these oscillators count as phase-shift? I found some references here at the Texas Instruments website, but I'm not quite sure:
https://www.ti.com/lit/...
0
votes
2answers
51 views
Finding phase angle of AC
After solving for a system of complex equations, I got the following currents:
$$I1= -.80669-.35675j$$
$$I2= -1.8546+1.30730j$$
Firstly, I found the current magnitude:
$$|I_1|=.88205A$$
$$|I_2|=2....
5
votes
5answers
2k views
90 Degree Phase shift at few MHz
I have a seemingly simple question but I've been doing a lot of searching and can't find an answer.
What is a simple or standard way to achieve a 90 degree phase shift of an RF signal in the ...
0
votes
2answers
81 views
Help with identifying a transfer function - with neuroscience application
This is a question for you electrical network engineers. The problem has arisen in a neuroscience study I am working on, but I hope to be able to glean some insight from other domains that deal with ...
1
vote
2answers
385 views
Phase shift in an LCR circuit
In a capacitive circuit the voltage lags current by 90 degrees. In an inductive circuit voltage leads current by 90 degrees. In a resistive circuit voltage and current are in phase. If we have a ...
0
votes
1answer
122 views
Simplest phase-shifted gate drive for two mosfets
I have two inverters, driven by two IRF530 mosfets. I need to drive them with a specific phase shift. What is the simplest, most basic way to do it, for simple prototyping? (I am neglecting PWM ...
1
vote
2answers
450 views
Transfer function of phase change controlled with capacitance
We have an RLC series circuit with sinusoidal voltage source of frequency \$\omega\$. The normal transfer function of current to voltage is:
$$ G(s) = \frac{I(s)}{V(s)} = \frac{1}{R+s L+ \frac{1}{s C}}...
0
votes
2answers
189 views
When finding impedance of an RC circuit, why do you multiply with -j and not j?
I understand the concept that the voltage lags behind the current in a capacitor, which is why we have to use imaginary numbers to find the impedance of a simple Series RC-circuit like this:
Which ...
0
votes
2answers
551 views
Is an all-pass filter a linear phase shift filter?
Im in need of an application that needs to add linear phase shift to a signal similary to the one produced by a Bessel Filter, meaning constant delay, my question is: does a standard 1st order all ...
0
votes
2answers
177 views
Voltage controlled phase shifter?
I want to build a real-time phase error correction circuit to correct the phase degree error of a feedback loop to prevent oscillation.
For this I need an electronically controlled phase shifter for ...
0
votes
1answer
152 views
CE BJT amplifier phase shift
I built simple CE amplifier in Multisim:
and make AC analysis, the phase are:
What is the reverse near 10 kHz? I make the identical circuit in LTSpice but there is no any equal to Multisim on phase ...
0
votes
0answers
130 views
Phase difference between two waves from wave equation
I need to calculate phase angle between
$$i_1 = -4\sin(377t + 55) \hspace{0.2cm}\quad \mathrm{and}\quad \hspace{0.2cm} i_2 = 5\cos(377t - 65)$$
I need to determine which one is leading too.
My ...
0
votes
2answers
477 views
Phase Shift in Audio Amplifier
I am trying to design a desktop audio amplifier, and I'd like to better understand the effects of phase shift on my output. I'm trying to design this amplifier to be of the highest quality I can, and ...
1
vote
1answer
6k views
Derivation of cutoff frequency and phase shift for RC low pass filter
I've been having some problems with how to find the cutoff frequency and the phase shift for a simple RC low pass filter circuit. I've read this post, but I need a better understanding of what ...
1
vote
1answer
282 views
Less than 180 phase shift in inverting amplifier
I'm simulating (click here) a standard BJT - CE inverting amplifier.
However, as you can see in the plot, the phase shift between voltage at the resistor and signal voltage is very different from 180 ...
0
votes
1answer
233 views
RHP zero with a positive phase shift
All books and references I read say that RHP zero gives a negative phase shift.
I can infer that by plot the phase of the function \$w_{z}-s\$ where \$w_{z}>0\$.
With this function, when frequency ...
0
votes
1answer
87 views
Criteria for considering transmission line effects due to phase delay
Below drawing illustrates a transmission line where the source voltage is:
Vs(t) = V0 x sin(ωt)
After reading some texts about the subject, I concluded how to decide whether one must consider ...
-1
votes
1answer
140 views
How to add a phase shifter to a Wien bridge oscillator
I need to add a variable phase shift circuit to my Wien Oscillator, I have done some research, but have only found phase shift oscillators made with 3 RC stages that generate a 180º shift. However, I ...
0
votes
1answer
62 views
Scattering parameters of a phase shifter
I connected a phase shifter to a VNA and measured S11 and S21. Upon setting the angle (phase) to a 100 degrees and measuring the phase of S11 I obtained the following graph, whereas theoretically S11=...
0
votes
0answers
75 views
Necessary phase shift of op amp
My lecturer said that, for any system where the amplitude response varies with frequency, such as for an op amp, there will necessarily be a frequency-dependent phase shift between the input and ...
