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Questions tagged [negative-resistance]

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Is static negative resistance practically available?

I learned that negative resistance (NR) could be simulated by involving active devices like op-amps and others. I'm interested in the static/absolute NR rather than the differential NR. My question is ...
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2answers
497 views

Oscillator circuit with a Negistor

I am trying to do some experiments with the following oscillator circuit extracted from http://jlnlabs.online.fr/cnr/negosc.htm based on Esaki oscillator. I am using 2N2222 and a 10mH inductor ...
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1answer
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Negative-Gm Oscillator Biasing Conditions

I have some questions regarding the circuit below. I need to ensure two conditions are met. The output is taken from the drains of the cross-coupled pair. I think the drain voltages (1.198V) are not ...
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1answer
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Negative Effective Resistance

Assume that we have a circuit that is connected with components that have positive resistance. At this point the effective resistance between every two node is positive. (below is an example of such ...
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4answers
248 views

How does a magnetic ballast (large inductor) stabilize a negative resistive circuit (such as a fluorescent light)?

When reading about fluorescent lights, I noted many sources stating that a large inductor (the magnetic ballast) in series with a negative resistor (the light, in this case) will stabilize it by ...
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2answers
454 views

Neon lamps in parallel DC

I am making a nixie clock and wanting to use 2 neon lamps in parallel for each colon. However in my test circuit I can only get one to strike at a time. The supply voltage is 170Vdc in order to power ...
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1answer
187 views

How to simulate adjustable 'negative resistance' with active components?

I'm building a decade resistance box using 2W resistors, from 10x1M ohm to 10x0.1 ohm. However, due to some contact resistance, the 0.1 to 1 ohm resistance will likely turn out to be ~1.1 ohm to 2 ...
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342 views

A questions about negative resistance?

I would like to look at negative resistance from a practical point of view, not just theory. Would you answer my questions,please? The op-amp, R1, R2, and R3 behave as a negative resistance: Rn = - ...