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Voltage and Current Baluns
Рет қаралды 8,442
10 ай бұрын#204 In this video I continue looking at baluns by exploring what exactly makes the current balun different from the voltage balun. Both are commonly used, and both have similar end proprieties - they link a balanced signal to an unbalanced one, but what exactly makes them different?
Balun series:
Ep1 - Communication lines and baluns • Communication lines an...
Ep2 - Voltage and Current baluns • Voltage and Current Ba...
Ep3 - Energy coupling • Energy transfer in Baluns
Ep4 - Transmission line baluns • Transmission-Line Baluns
Ep5 - Transmission line experiments: • Experiments with Trans...
Ep6 - The Ruthroff Transformer: • The Ruthroff Impedance...
Ep7 - The Guanella Transformers: • Analyzing Guanella Imp...
EP8 - LC baluns: • Building INDUCTOR-CAPA...
Further reading:
blog.minicircu...
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@mr1enrollment 10 ай бұрын
Just want tho thank and praise you for the excellent videos. I am a retired EE, and your videos provide welcome refreshing of my 50 years past education. These past two videos in particular have FINALLY impressed upon me the difference and use of Voltage versus Current Baluns - So Thanks!
@alaricsnellpym 10 ай бұрын
In amateur radio circles, the operation of baluns is often hand-waved other, so for somebody such as myself who needs to know how something REALLY works to understand it... This video is helping a lot :-D
@ghlscitel6714 10 ай бұрын
Next subject for this topic will be impedance.
@epleace 10 ай бұрын
this is the first presentation of the differences between the balun types that has made sense to me - thanks for your excellent videos.
@paulp1204 10 ай бұрын
Great video Fesz. I haven't had to use baluns much before, but expect that to change now I've picked up the Han radio bug. Thank you.
@andrew-qf4xl 10 ай бұрын
great video, and thank you for providing a source for further reading.
@layt01 10 ай бұрын
I think it is more usual to have pure differential load, without RC grounding in the middle. I am looking forward to the next episodes.
@Mike-H_UK 10 ай бұрын
Excellent video. I always find the topic of transmission line transformers very interesting. When one first looks at them one is tempted to think 'how can they work?' because there is no magnetic field outside of a coax line. However, that is only when the currents are balanced, when getting to be balanced there is a field! I've read a books by Jerry Sevick and articles by Chris Trask, and made a dozen or so twisted pair transformers myself, but your perspective on this (one that I respect) would also be very interesting.
@BusDriverRFI 2 ай бұрын
In your first computer simulation, you have a 50 ohm source feeding a 100 ohm resistor in series with a 100 ohm resistor in parallel with a 1 ohm/1uF to ground. Where did you come up with this model for the simulation? Where's the necessary inductance? Is it already cancelled out? How do you reconcile this model with the antenna circuit definition of R+jX? How do you unbalance a resistor in series with an inductor and capacitor? You are familiar with R+jX, right?
@aduedc 9 ай бұрын
Thanks for good presentation. @7:47 I do not undersand why you connected single ended Voltage Source to Voltage Balun?!
@FesZElectronics 9 ай бұрын
To generate a balanced signal - maybe I didn't understand the question... the voltage source is unbalanced, but by using the balun, I created a balanced signal from it.
@lakshminarayanaaithal1081 10 ай бұрын
Can you make an detailed video on Ethernet transformer/Magnetics including CMC and Measuring it on oscilloscope. Please
@urgtuiop5455 10 ай бұрын
what frequency do things start to work?
@Cynthia_Cantrell 10 ай бұрын
That depends on the magnetic materials of the choke or transformer. You'll need to pick the one that fits your application - audio for low frequencies, or RF for higher frequencies. A transformer's useful frequency range will be provided on its data sheet. Some applications will involve a DC blocking cap in series with it, so that may reduce the operating range as well.
@urgtuiop5455 10 ай бұрын
I couldn't see that level of choice complexity in the circuit model.