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As logic memory storage device. A practical tunnel diode circuit may consist of a switch s a resistor r and a supply source v connected to a tank circuit through a tunnel diode d. What Is A Tunnel Diode Definition Symbol Construction Research Tunnel Diode Oscillator Application Of Tunnel Diode Diy After turning the switch the current that is determined by resistor r1 is applied to the resistor r2 and diode. Tunnel diode circuit . The capacitance c is the junction diffusion capacitance 1 to 10 pf and r n is the negative resistance. In relaxation oscillator circuit. The tunnel diode is a highly conductive heavily doped pn junction diode in which the current induces because of the tunnelling. The tunnel diode circuit symbol is as shown below. The resistance r s is due to the leads ohmic contact and semiconductor materials 1 5 ohm. Tunnel diodes h...