In electronics, negative resistance (NR) is a property of some electrical circuits and devices in which an increase in voltage across the device's terminals...

negative resistance characteristic in early tetrode vacuum tubes, caused by a process called secondary emission. It was the first negative resistance...

terminal) devices with negative resistance, such as magnetron tubes, tunnel diodes, IMPATT diodes and Gunn diodes. Negative-resistance oscillators are usually...

levels. The current–voltage characteristic often exhibits negative differential resistance regions. All types of tunneling diodes make use of quantum...

service for some time. After the turn of the century it was found that negative resistance mercury lamps could amplify, and were also tried in repeaters, with...

Certain systems can achieve negative thermodynamic temperature; that is, their temperature can be expressed as a negative quantity on the Kelvin or Rankine...

which worked by a new principle; negative resistance (some of the prewar microwave tubes had also used negative resistance). The feedback oscillator and...

chordal line is negative, have negative static resistance. Passive devices, which have no source of energy, cannot have negative static resistance. However active...

that positive current enters the device through the negative voltage terminal, power and resistance are given by p = − v i {\displaystyle p=-vi\,}    and   ...

voltage, the negative resistance of the diode can cancel the positive resistance of the circuit, creating a circuit with zero AC resistance, in which spontaneous...

{\displaystyle V_{\text{S}}} , and the circuit acts like a resistor with negative resistance R in ≜ V S I S = − R 3 R 1 R 2 . {\displaystyle R_{\text{in}}\triangleq...

provides a positive resistance or reactance that limits the current. The ballast provides for the proper operation of the negative-resistance device by limiting...

lower figure). A "locally active resistor" is a device that has negative resistance and is active (it can amplify), providing the power to generate the...

reactions lies between 2 and 3. Most ceramics exhibit negative temperature dependence of resistance behaviour. This effect is governed by an Arrhenius equation...

variation of conductivity with temperature, as well as occasional negative resistance. Such disordered materials lack the rigid crystalline structure of...

Esaki diode is a type of semiconductor diode that has effectively "negative resistance" due to the quantum mechanical effect called tunneling. It was invented...

diode, a two-terminal semiconductor electronic component, with negative differential resistance, used in high-frequency electronics. It is based on the "Gunn...

port neglecting any reactive components. If the impedance yields a negative resistance term, oscillation is possible. This method will be used here to determine...

nonlinear resistance, such as a diode. In this type the resistance varies with the applied voltage or current. Negative resistance vs positive resistance: If...

the gate junction reverse-biased. The UJT is a current-controlled negative resistance device. The device has a unique characteristic in that when it is...

Semiconductor Laboratory in the late 1950s. The Shockley diode has a negative resistance characteristic. It was largely superseded by the diac. Unlike other...

practical applications such as electroluminescence. He explored negative resistance in semiconductor junctions, and was first to use them practically...

used in high-frequency microwave electronics devices. They have negative resistance and are used as oscillators and amplifiers at microwave frequencies...

connecting two negative impedance converters in parallel. A negative impedance converter (NIC) is a simple op amp circuit that has negative resistance. Another...

(light-emitting diodes). Tunnel, Gunn and IMPATT diodes exhibit negative resistance, which is useful in microwave and switching circuits. Diodes, both...

Gram-positive and Gram-negative bacteria can evade or 'escape' commonly used antibiotics due to their increasing multi-drug resistance (MDR). As a result...

band Voivod Negatron, a four element vacuum tube which displays a negative resistance characteristic This disambiguation page lists articles associated...

Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial...

relay, op amp, or a negative resistance device like a tunnel diode, that repetitively charges a capacitor or inductor through a resistance until it reaches...

into a two-terminal device that exhibits an area of differential negative resistance much like a tunnel diode. The term refers to the shape of the V–I...