Questions tagged [phase]
For questions about AC phases (e.g. three-phase systems) or phase in the context of waves, transfer functions, etc. Consider using in conjunction with related tags such as "three-phase", "transfer-function", etc., as applicable.
367 questions
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Control Loop response of Buck Converters - Why?
In buck converters, control loop analysis involves injecting a small AC signal into the output feedback path to assess how the loop responds. This method helps evaluate the stability and dynamic ...
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How to express the instantaneous current of each phase winding for a multi-phase motor?
I am working on an application of conformal mapping to the computation of the magnetic field in motors based on this paper, but I have trouble understanding how to compute the instantaneous current of ...
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Bode Plot Analysis - Determine parameters
I'm designing a digital boost converter and need help analyzing this Bode plot. Could you please help me determine the following parameters:
Crossover Frequency
Phase Margin
Gain Margin
My conclusions ...
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What is the difference between line and phase voltage?
In a three phase system, I’ve heard line voltage described as the RMS of the voltage difference between two lines coming from the power source and phase voltage is RMS voltage of a particular line ...
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Phase coherence problem between two RTL-SDR's (V3 & V4)
Im currently trying to acheive some rough phase coherence between two rtl-sdr dongles, the dongles share a single 28.8 MHz clock signal (from V4 to V3). However, there seems to be some phase drift ...
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Why is the collector voltage of Q3 inverted in this differential amplifier circuit?
I’m working with a differential amplifier built with two NPN BJTs (Q3 and Q4, both MPSA06) and an active current source implemented using MOSFETs (Q1 and Q2, both BS170). The schematic is shown below:
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Why do electrical engineers prefer "phase shift" instead of "time shift"?
Humans experience time, not phase.
Imagine the childhood game of message passing between a wire connected to two cups, one person talking at one end of the cup and the other person listening. The ...
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Oscillations in a transimpedance amplifier
I have been having a hard time understanding why oscillations are caused in a transimpedance amplifier (to clarify, I am just trying to understand the theory behind all of it)
Cin representing the ...
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Understanding Voltage and Current Phase Difference
I am having trouble understanding the concept of voltage and current having a phase difference in AC circuits. I have recently begun exploring AC circuits and have just started delving into the ...
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Need a simple circuit to do threshold tests against a 220V circuit being varied by phase-cut lighting dimmer
I am looking for a way to test to see if a phase cut dimmer on a 220V AC circuit is set to over a certain approximate percentage of full power, and use the output of that test to trigger a relay ...
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Flicker and Noise Floor
https://www.ti.com/lit/an/sbaa661/sbaa661.pdf?ts=1745596081730&ref_url=https%253A%252F%252Fwww.google.com%252F
This document talks about the impact of slew rate of reference source on PLL. Few ...
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Circuit for voltage controlled sawtooth phase shifting (0 to 360 degrees)
I'm looking for an analog circuit that can phase shift a sawtooth wave from 0 to 360 degrees.It needs to work with frequencies from say 1 Hz to 20 kHz.
I found one here https://modwiggler.com/forum/...
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Weird phase shift values even for simple circuits in LTSpice
I simulated some complicated circuits to solve why an oscilator is not oscilating (strange Murphys law - emitter follower is oscilating, but oscilator not :)) ) and still had a strange phase shift ...
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PMU vs PLL in power system
I have been reading a lot about power systems lately, and am confused regarding the difference between phasor measurement units and phase locked loop? Firstly, are they different. PMU as I have read ...
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Old single phase motor
I am trying to figure out how to wire this old Stayrite 3hp single phase motor. I have attached a picture of the terminals but that’s all the info I have. I am not sure if there is a capacitor ...
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