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Old 11-06-2017, 05:21 AM   #1
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Default Barkhausen criteria

Just out of curiosity I want to know what is Barkhausen criteria? Any suggestions.
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Old 11-06-2017, 07:01 AM   #2
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Quote:
Originally Posted by Sanjeev Nanda View Post
Just out of curiosity I want to know what is Barkhausen criteria? Any suggestions.
I'm not the one to ask.
I kinda go back and forth on the definition.
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Old 11-06-2017, 07:38 AM   #3
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Quote:
Originally Posted by Sanjeev Nanda View Post
Just out of curiosity I want to know what is Barkhausen criteria? Any suggestions.
Do you want me to google it for you?
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Old 11-06-2017, 07:38 AM   #4
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Do you want me to google it for you?
Quote:
Originally Posted by Sanjeev Nanda View Post
Just out of curiosity I want to know what is Barkhausen criteria? Any suggestions.
Do you want me to google it for you?
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Old 11-06-2017, 10:24 AM   #5
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I don't know what the hell it has to do with electrical construction but it's a design consideration for a feedback loop. Either positive or negative. But I always use a bandsaw.
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Old 11-06-2017, 04:58 PM   #6
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In electronics, the Barkhausen stability criterion is a mathematical condition to determine when a linear electronic circuit will oscillate. It was put forth in 1921 by German physicist Heinrich Georg Barkhausen (18811956).

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Old 11-06-2017, 05:07 PM   #7
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courtesy wikipedia:

Quote:
He discovered in 1919 an effect named after him, the Barkhausen effect, which provided evidence for the magnetic domain theory of ferromagnetism.[1][2] When the magnetic field through a piece of ferromagnetic material like iron is changing, the magnetization of the material changes in a series of tiny discontinuous jumps, which can be heard as a series of clicks in a loudspeaker attached to a coil of wire around the iron. It was later determined that these jumps were caused by the movement of the magnetic domains in the iron, as the domain walls snap past defects in the crystal lattice. The energy lost in these dissipative events is responsible for the shape of the hysteresis curve of iron and other ferromagnets. This effect is widely used in research, and physics education as a simple experiment to demonstrate the reality of magnetic domains.
interesting stuff, that

additionally, also from wiki:

Quote:
In 1920 with K. Kurz he invented the Barkhausen-Kurz oscillator,[2] the first vacuum tube electronic oscillator to use electron transit-time effects.[2][3] It was the first vacuum tube oscillator that could operate at ultrahigh frequency, up to 300 MHz,[3] and inspired later microwave transit-time tubes such as the klystron.[1]
In 1921 he derived the first mathematical conditions for oscillation in electrical circuits, now called the Barkhausen stability criterion. It is widely used today in the design of electronic oscillators, and general feedback amplifier circuits.
In 1933 Barkhausen signed the Loyalty Oath of German Professors to Adolf Hitler and the National Socialist State.
https://en.wikipedia.org/wiki/Heinrich_Barkhausen
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Old 11-06-2017, 06:35 PM   #8
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I know that if you fcuk up the PID parameters for a low lift pump feeding the filters, that the filters will flood, then drain, then flood, then drain......etc

For some reason the plant engineer starts screaming that air is in the filter media, and they have to shut down the plant.

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Old 11-06-2017, 06:43 PM   #9
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When I first set my eyes on the title of this OP , I s**t you not ,
I thought this was going to be about brewing beer.
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