chaos in negative resistance

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Bhuvanesh123

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we know voltage divider bias circuit gives the fraction of the input voltage.i seen in a book that with choosing any one of the resistance has negative ,we achieve amplification.what does that negative resistance mean.how does it affect the circuit.explain me basically
 

Don't know what's exactly written in your book, but the voltage divider with a negative resistance is theoretical construct and doesn't exist as real circuit. A pure negative resistance would need an internal energy source and isn't possible as a simple component.

Components with differential negative resistance exist, e.g. tunnel diodes https://en.wikipedia.org/wiki/Tunnel_diode or gas discharge tubes.
 

A "negative resistance" is a voltage controlled current source with a current flowing into the controlling node.
(Similarly to a "normal" positive resistor with a current that flows out of the driving voltage node.)
This has nothing to do with "chaos".
Negative resistors can be used to compensate damping effects in filters and oscillators.
 

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