Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [unbalanced]

32 questions
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Unbalanced differential pair in NE5234

I had a question in mind. I was reading "Design and Analysis of Integrated Circuits" by Gray and Meyer... In the edition 5 there is an analysis of a Low power OpAmp NE5234... In the second stage of Amplification an unbalanced differential pair is…
Miad75
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'true' balanced audio?

I was working on the below circuit, to create a balanced audio output. But have been told this creates a differential audio output, not a 'true' balanced audio output. "A true balanced output would couple interference on one leg to the other,…
R2D2
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Unbalanced three phase system with unbalanced phase to phase voltages

I've got quite a problem here trying to solve this 3 phase system (2nd U12 should be U31) and hope you can help me: I'm trying to calculate the single phase voltages and currents for the drawn case with the connected neutral and once for the…
M. Matthias
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Measure unbalanced tri-phased power with 2-channel scope

Our robot is supplied trough our own "supply block", which is converting 3 phase AC (without neutral) into DC current and powering a 2 smaller devices directly between 2 pairs of phases. simulate this circuit – Schematic created using…
Sandro
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In which direction is the microphone signal transported?

So I understand the general principle of how the audio signal is transported. I also understand that audio signals can be distinguish between AC and DC. But let's say we have a TRRS Jack like below. I will use the names in the pictures to explain. I…
Koala
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Solving for phase currents given line currents and line voltages in 3 phase unbalanced delta load

I am given the line currents and the line voltages for an unbalanced 3-phase delta connected load but need to solve for the phase currents on the legs of the delta load. I know that: $$I_{L1} = I_{a} - I_{b}$$ $$I_{L2} = I_{b} - I_{c}$$ $$I_{L1} =…
gmartine242
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Padding/impedance matching of a phono input

My old stereo amp got coffee spilled on it. I replaced it with the latest model from the same manufacturer. I am an old-world person, and prefer simple approaches - i.e., radio buttons to select from multiple RCA inputs. My whole system is built…
eSurfsnake
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"Ideal" way of using 3-conductor cable for unbalanced audio

I am intending to make some short (<30cm) unbalanced audio cables to interconnect devices on a musical instrument pedal board. As a matter of convenience, I was thinking of using some Belden 9451 three-conductor cable for this because I have a lot…
user156429
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2 answers

What are the limitations of "fake" balanced audio cables?

I have an AV receiver providing amplified outputs and preamp outputs. The pre-amp outputs are in the form of (unbalanced) RCA jacks. My speakers are amplified and have a balanced input. I was looking for an audio transformer to convert the…
FarO
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Transfomation of impedance using a balun

I need to convert 75 ohms balanced impedance to 50 ohms unbalanced impedance using a balun. How do I do that? I am new to this and don't really understand the concept of a:1 voltage and current baluns.
Siddhartha rao kamalakara
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Solving the problem of connecting a high-current, single-phase load to a three-phase balanced network

I am an electrical technician working in a hospital. In the laundry room, all the cloth washers contain three-phase motors which are balanced loads connected to a 140 A circuit breaker. The consumption does not exceed 30 A in each phase. The…
user137684
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Unbalanced output to balanced input

I have a common mic preamp scheme based on ina217. Balanced part works, but I would want to add hi-z input (ub_buf), with gain control still done via ina217. ub_buf point is a buffered unbalanced input. Can I just connect unbalanced input (ub_buf)…
dkiselev
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Ramifications of voltage imbalance in a 3-phase motor

I have a 2.2 kW, 3-phase motor running a high pressure compressor. The supply mains voltage is very unbalanced. P1 221 V, P2 185 V, and P3 220 V under load (it should be 240 V). This is a 3rd world country and I have no ability to correct the…
SV Savannah
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What effect does a splitting an audio signal using a y-cable have on that audio signal?

Given a clean instrument-level audio signal of reasonable amplitude passing from point A to point B via a TR/unbalanced cable, what effect would replacing that cable with a TR to dual TR cable running from point A to points B and C have on the…
Undistraction
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How power system handle unbalanced load?

how a delta connected primary winding of three phase distribution transformer tackle unbalanced load of three phase 4 wire unbalanced load(unbalanced load is quite common due to supply of single phase equipment using neutral wire)?
Zarzis Rony
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