A vacuum tube can also be made to exhibit negative resistance.

All of these devices exhibit the phenomenon called negative resistance.

If and are complex and of the same sign, will be a negative resistance.

Overall, the effect is a negative resistance at the emitter terminal.

On the other hand if R is replaced by a negative resistance such that,

One notices that a negative resistance would cause the oscillations to increase.

So high frequency oscillators in general are designed using negative resistance techniques.

This causes an area of a negative resistance.

This was negative resistance phenomenon, decades before the tunnel diode.

Therefore the negative resistance only occurs over a limited range of voltages.

After the turn of the century it was found that negative resistance mercury lamps could amplify, and they were used.

If the impedance yields a negative resistance term, oscillation is possible.

Any amplifier with sufficient positive feedback will present a negative resistance at its input.

The mercury vapor lamp is a negative resistance device.

Such a differential negative resistance is illustrated in Figure 1 with a resonant-tunneling diode.

The input port of the circuit can be connected into another network as if it were a negative resistance component.

When biased so that the operating point is in the negative resistance region, these devices can be used as an Amplifier.

For negative resistance to be present there must be active components in the circuit providing a source of energy.

The most important operating region for a tunnel diode is the negative resistance region.

Tunnel diodes exhibit negative resistance, which makes them useful in some types of circuits.

The sounds were created by instabilities in the current caused by the arc's negative resistance.

Passive components will have negative resistance and negative power flow

This avoids confusion over the meaning of "negative power", and particularly "negative resistance".

Unijunction transistors also have negative resistance properties when a circuit is built using other components.

The discontinuity caused by negative resistance devices (such as tunnel diodes) can also be seen.