11. A negative impedance converter ( NIC ) is a simple op amp circuit that has negative resistance . 12. Electric arcs have a peculiar negative resistance : the voltage drop goes down as the current increases. 13. Tunnel, Gunn and IMPATT diodes exhibit negative resistance , which is useful in microwave and switching circuits. 14. The negative resistance of the screen grid cancels the positive resistance of the tuned circuit, causing oscillations. 15. I, along with several other editors re-wrote Negative resistance page, against CF's objections. 16. However, only solutions with a positive real part are physically meaningful since passive circuits cannot exhibit negative resistance . 17. In negative resistance oscillators, a resonant circuit, such as an LC circuit, damped and decay to zero. 18. Nixies exhibit negative resistance and will maintain their glow at typically 20 V to 30 V below the strike voltage. 19. With high electric currents MoTe 2 shows negative resistance , where as the current increases the voltage across the material decreases. 20. The BARITT diode uses Injection and Transit-time properties of minority carriers to produce a negative resistance at microwave frequencies.
